1
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 27, 2001

                                                REGISTRATION NO. 333-___________
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   ----------

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                   ----------

                                GERON CORPORATION
             (Exact Name of Registrant as Specified in Its Charter)

                                   ----------

           DELAWARE                                              75-2287752
(State or Other Jurisdiction of                               (I.R.S. Employer
Incorporation or Organization)                               Identification No.)

                                   ----------

                             230 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025
                                 (650) 473-7700
               (Address, Including Zip Code and Telephone Number,
        Including Area Code, of Registrant's Principal Executive Offices)

                                   ----------

                                THOMAS B. OKARMA
                      PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                GERON CORPORATION
                             230 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025
                                 (650) 473-7700
            (Name, Address, Including Zip Code and Telephone Number,
                   Including Area Code, of Agent for Service)

                                   ----------

                                   Copies to:

                                   ----------

                             Alan C. Mendelson, Esq.
                                Latham & Watkins
                             135 Commonwealth Drive
                          Menlo Park, California 94025
                                 (650) 328-4600

                                   ----------

     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time
to time after this Registration Statement becomes effective.

                                   ----------

     If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box [ ]

                                 ---------------

                         CALCULATION OF REGISTRATION FEE


=================================================================================================================
                                                        PROPOSED MAXIMUM       PROPOSED MAXIMUM       AMOUNT OF
    TITLE OF SECURITIES TO BE       AMOUNT TO BE       OFFERING PRICE PER     AGGREGATE OFFERING    REGISTRATION
            REGISTERED              REGISTERED(1)             SHARE                 PRICE               FEE
-----------------------------------------------------------------------------------------------------------------
                                                                                        
Common Stock, par value $.001
  per share(5)                        100,000 shares        $ 9.48(2)            $  948,000           $237.00
-----------------------------------------------------------------------------------------------------------------
Common Stock issuable upon
  exercise of warrant(5)              100,000               $14.60(3)            $1,460,000           $365.00
-----------------------------------------------------------------------------------------------------------------
       Total                          200,000                                    $2,408,000           $602.00
=================================================================================================================


(1)  In the event of a stock split, stock dividend, or similar transaction
     involving Geron's common stock, in order to prevent dilution, the number of
     shares registered shall automatically be increased to cover the additional
     shares in accordance with Rule 416(a) under the Securities Act.

(2)  The offering price is estimated solely for the purpose of calculating the
     registration fee in accordance with Rule 457(c) and based upon the average
     of the high and low prices reported by Nasdaq National Market on September
     24, 2001.

(3)  The exercise price of the closing warrants was used for the purpose of
     calculating the amount of the registration fee in accordance with Rule
     457(g) under the Securities Act.

(4)  Calculated in accordance with Rule 457(o) under the Securities Act of 1933.

(5)  Each share of the registrant's common stock being registered hereunder
     includes Series A junior participating preferred stock purchase rights.
     Prior to the occurrence of certain events, the Series A junior
     participating preferred stock purchase rights will not be exercisable or
     evidenced separately from the registrant's common stock and have no value
     except as reflected in the market price of the share to which they are
     attached.

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL HEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.

================================================================================


   2

                SUBJECT TO COMPLETION, DATED SEPTEMBER 27, 2001

                             UP TO 200,000 SHARES OF

                                GERON CORPORATION

                                  COMMON STOCK

     Our common stock is traded on the Nasdaq National Market under the symbol
"GERN." On September ___, 2001, the closing price of our common stock was $____.

     This prospectus relates to the sale of up to 200,000 shares of our common
stock by University Technology Corporation. We will not receive any of the
proceeds from the sale of these shares covered by this prospectus.

     INVESTING IN OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK. SEE "RISK
FACTORS" BEGINNING ON PAGE 3.

                             ----------------------

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the
accuracy or adequacy of the prospectus. Any representation to the contrary is a
criminal offense.

                             ----------------------


                The date of this prospectus is ___________, 2001.

   3

                                TABLE OF CONTENTS

                                                                           PAGE
                                                                           ----
ABOUT GERON................................................................  1

RISK FACTORS...............................................................  1

FORWARD-LOOKING STATEMENTS................................................. 12

USE OF PROCEEDS............................................................ 13

SELLING STOCKHOLDER........................................................ 13

PLAN OF DISTRIBUTION....................................................... 14

LEGAL MATTERS.............................................................. 15

EXPERTS.................................................................... 15

LIMITATION ON LIABILITY AND DISCLOSURE OF COMMISSION POSITION ON
  INDEMNIFICATION FOR SECURITIES ACT LIABILITIES........................... 15

WHERE YOU CAN FIND MORE INFORMATION........................................ 16

CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS..................................

   4

                                   ABOUT GERON

     We are a biopharmaceutical company focused on developing and
commercializing therapeutic and diagnostic products for applications in oncology
and regenerative medicine, and research tools for drug discovery. Our product
development programs are based upon three patented core technologies:
telomerase, human embryonic stem cells and nuclear transfer.

     We were incorporated in 1990 under the laws of Delaware. Our principal
executive offices are located at 230 Constitution Drive, Menlo Park, California
94025 and our telephone number is (650) 473-7700. References in this prospectus
to "we," "us," "our," and "Geron" refer to Geron Corporation and its
subsidiaries.

                                  RISK FACTORS

OUR BUSINESS IS AT AN EARLY STAGE OF DEVELOPMENT AND WE MAY NOT DEVELOP ANY
PRODUCTS THAT REACH CLINICAL TRIALS

     The study of the mechanisms of cellular aging and cellular immortality,
including telomere biology and telomerase, the study of human embryonic stem
cells, and the process of nuclear transfer are relatively new areas of research.
Our business is at an early stage of development. We have not yet produced any
products that have progressed to clinical trials and we may never do so. Our
ability to produce products that progress to clinical trials is subject to our
ability to, among other things:

     o    continue to have success with our research and development efforts;

     o    select therapeutic compounds for development;

     o    obtain the required regulatory approvals; and

     o    manufacture and market resulting products.

     If and when potential lead drug compounds or product candidates are
identified through our research programs, they will require significant
preclinical and clinical testing prior to regulatory approval in the United
States and elsewhere. In addition, we will also need to determine whether any of
these potential products can be manufactured in commercial quantities at an
acceptable cost. Our efforts may not result in a product that can be marketed.
Because of the significant scientific, regulatory and commercial milestones that
must be reached for any of our research programs to be successful, any program
may be abandoned, even after significant resources have been expended.

WE HAVE A HISTORY OF OPERATING LOSSES AND ANTICIPATE FUTURE LOSSES; CONTINUED
LOSSES COULD IMPAIR OUR ABILITY TO SUSTAIN OPERATIONS

     We have incurred operating losses every year since our operations began in
1990. As of June 30, 2001, our accumulated deficit was approximately $163.3
million. Losses have resulted principally from costs incurred in connection with
our research and development activities and from general and administrative
costs associated with our operations. We expect to incur additional operating
losses over the next several years as our research and development efforts and
preclinical testing activities are expanded. Substantially all of our revenues
to date have been research support payments under the collaboration agreements
with Kyowa Hakko and Pharmacia. In 2001, we regained our rights to telomerase
inhibitors from Pharmacia. Kyowa Hakko provided additional research funding in
2001. We may be unsuccessful in entering into any new corporate collaboration
that results in revenues. Even if we are able to obtain new collaboration
arrangements with third parties, the revenues generated from these arrangements
will be insufficient to continue or expand our research activities and otherwise
sustain our operations.

     We are unable to estimate at this time the level of revenue to be received
from the sale of diagnostic products and telomerase-immortalized cell lines, and
do not currently expect to receive significant revenues from the sale of these
products. Our ability to continue or expand our research activities and
otherwise sustain our operations is dependent on our ability, alone or with
others to, among other things, manufacture and market therapeutic products.

   5

     We may never receive material revenues from product sales or if we do
receive revenues, such revenues may not be sufficient to continue or expand our
research activities and otherwise sustain our operations.

WE WILL NEED ADDITIONAL CAPITAL TO CONDUCT OUR OPERATIONS AND DEVELOP OUR
PRODUCTS, AND OUR ABILITY TO OBTAIN THE NECESSARY FUNDING IS UNCERTAIN

     We will require substantial capital resources in order to conduct our
operations and develop our products. While we estimate that our existing capital
resources, interest income and equipment financing arrangements will be
sufficient to fund our current level of operations through December 31, 2002, we
cannot guarantee that this will be the case. The timing and degree of any future
capital requirements will depend on many factors, including:

     o    the accuracy of the assumptions underlying our estimates for our
          capital needs in 2001 and beyond;

     o    continued scientific progress in our research and development
          programs;

     o    the magnitude and scope of our research and development programs;

     o    our ability to maintain and establish strategic arrangements for
          research, development, clinical testing, manufacturing and marketing;

     o    our progress with preclinical and clinical trials;

     o    the time and costs involved in obtaining regulatory approvals;

     o    the costs involved in preparing, filing, prosecuting, maintaining,
          defending and enforcing patent claims; and

     o    the potential for new technologies and products.

     We intend to acquire additional funding through strategic collaborations,
public or private equity financings, capital lease transactions or other
financing sources that may be available. Additional financing may not be
available on acceptable terms, or at all. Additional equity financings could
result in significant dilution to stockholders. Further, in the event that
additional funds are obtained through arrangements with collaborative partners,
these arrangements may require us to relinquish rights to some of our
technologies, product candidates or products that we would otherwise seek to
develop or commercialize ourselves. If sufficient capital is not available, we
may be required to delay, reduce the scope of or eliminate one or more of our
research or development programs, each of which could have a material adverse
effect on our business.

OUR INABILITY TO IDENTIFY A SAFE AND EFFECTIVE INHIBITOR OF TELOMERASE MAY
PREVENT US FROM DEVELOPING A VIABLE CANCER TREATMENT PRODUCT, WHICH WOULD
ADVERSELY IMPACT OUR FUTURE BUSINESS PROSPECTS

     As a result of our drug discovery efforts to date, we have identified
compounds in laboratory studies that demonstrate potential for inhibiting
telomerase in humans. Kyowa Hakko has selected one of these compounds, GRN 163,
as a lead compound for preclinical development and clinical trials as a
telomerase inhibitor for cancer. Further research is required to determine if
this compound can be fully developed as a commercially viable treatment for
cancer.

     This compound, and other compounds we have identified, may prove to have
undesirable and unintended side effects or other characteristics affecting its
safety or effectiveness that may prevent or limit its commercial use. In terms
of safety, our discoveries may result in cancer treatment solutions that cause
unacceptable side effects for the human body. Our discoveries may also not be as
effective as is necessary to market a commercially viable product for the
treatment of cancer. As a result, telomerase inhibition may need to be used in
conjunction with other cancer therapies. Accordingly, it may become extremely
difficult for us to proceed with preclinical and clinical development, to obtain
regulatory approval or to market a telomerase inhibitor for the treatment of
cancer. If we abandon our research for cancer treatment for any of these reasons
or for other reasons, our business prospects would be materially and adversely
affected.


                                       2

   6

IF OUR ACCESS TO NECESSARY TISSUE SAMPLES, INFORMATION OR LICENSED TECHNOLOGIES
IS RESTRICTED, WE WILL NOT BE ABLE TO DEVELOP OUR BUSINESS

     To continue the research and development of our therapeutic and diagnostic
products, we need access to normal and diseased human and other tissue samples,
other biological materials and related clinical and other information. We
compete with many other companies for these materials and information. We may
not be able to obtain or maintain access to these materials and information on
acceptable terms, if at all. In addition, government regulation in the United
States and foreign countries could result in restricted access to, or
prohibiting the use of, human and other tissue samples. If we lose access to
sufficient numbers or sources of tissue samples, or if tighter restrictions are
imposed on our use of the information generated from tissue samples, our
business will be materially harmed.

SOME OF OUR COMPETITORS MAY DEVELOP TECHNOLOGIES THAT ARE SUPERIOR TO OR MORE
COST-EFFECTIVE THAN OURS, WHICH MAY IMPACT THE COMMERCIAL VIABILITY OF OUR
TECHNOLOGIES AND WHICH MAY SIGNIFICANTLY DAMAGE OUR ABILITY TO SUSTAIN
OPERATIONS

     The pharmaceutical and biotechnology industries are intensely competitive.
We believe that other pharmaceutical and biotechnology companies and research
organizations currently engage in or have in the past engaged in efforts related
to the biological mechanisms of cell aging and cell immortality, including the
study of telomeres, telomerase, human embryonic stem cells and nuclear transfer.
In addition, other products and therapies that could compete directly with the
products that we are seeking to develop and market currently exist or are being
developed by pharmaceutical and biopharmaceutical companies and by academic and
other research organizations.

     Many companies are also developing alternative therapies to treat cancer
and, in this regard, are competitors of ours. Many of the pharmaceutical
companies developing and marketing these competing products have significantly
greater financial resources and expertise than we do in:

     o    research and development;

     o    manufacturing;

     o    preclinical and clinical testing;

     o    obtaining regulatory approvals; and

     o    marketing.

     Smaller companies may also prove to be significant competitors,
particularly through collaborative arrangements with large and established
companies. Academic institutions, government agencies and other public and
private research organizations may also conduct research, seek patent protection
and establish collaborative arrangements for research, clinical development and
marketing of products similar to ours. These companies and institutions compete
with us in recruiting and retaining qualified scientific and management
personnel as well as in acquiring technologies complementary to our programs.
There is also competition for access to libraries of compounds to use for
screening. Should we fail to secure and maintain access to sufficiently broad
libraries of compounds for screening potential targets, our business would be
materially harmed.

     In addition to the above factors, we expect to face competition in the
following areas:

     o    product efficacy and safety;

     o    the timing and scope of regulatory consents;

     o    availability of resources;


                                       3

   7

     o    reimbursement coverage;

     o    price; and

     o    patent position, including potentially dominant patent positions of
          others.

     As a result of the foregoing, our competitors may develop more effective or
more affordable products, or achieve earlier patent protection or product
commercialization than us. Most significantly, competitive products may render
the products that we develop obsolete.

THE ETHICAL, LEGAL AND SOCIAL IMPLICATIONS OF OUR RESEARCH USING EMBRYONIC STEM
CELLS AND NUCLEAR TRANSFER COULD PREVENT US FROM DEVELOPING OR GAINING
ACCEPTANCE FOR COMMERCIALLY VIABLE PRODUCTS IN THIS AREA

     Our programs in regenerative medicine may involve the use of human
embryonic stem cells that would be derived from human embryonic or fetal tissue.
The use of human embryonic stem cells gives rise to ethical, legal and social
issues regarding the appropriate use of these cells. In the event that our
research related to human embryonic stem cells becomes the subject of adverse
commentary or publicity, the market price for our common stock could be
significantly harmed.

     Some groups have voiced opposition to our technology and practices. The
concepts of cell regeneration, cell immortality, and genetic cloning have
stimulated significant ethical debates in both the social and political arenas.
We use human embryonic stem cells derived through a process that uses either
donated embryos that are no longer needed following a successful in vitro
fertilization procedure or donated fetal material as the starting material.
Further, many research institutions, including some of our scientific
collaborators, have adopted policies regarding the ethical use of human
embryonic and fetal tissue. These policies may have the effect of limiting the
scope of research conducted using human embryonic stem cells, resulting in
reduced scientific progress. In addition, the United States government and its
agencies have in recent years refused to fund research which involves the use of
human embryonic tissue. President Bush, however, announced on August 9, 2001
that he would permit federal funding of research on human embryonic stem cells
using the limited number of embryonic stem cell lines that had already been
created. A newly created president's council will monitor stem cell research,
and the guidelines and regulations it recommends may include restrictions on the
scope of research using human embryonic or fetal tissue. Our inability to
conduct research using human embryonic stem cells due to such factors as
government regulation or otherwise could have a material adverse effect on us.
Finally, we acquired Roslin Bio-Med to gain the rights to nuclear transfer
technology. The Roslin Institute produced Dolly the sheep in 1997 -- the first
mammal cloned from an adult cell in history. Geron acquired exclusive rights to
this technology for all areas except human reproductive cloning and certain
other limited applications. Although we will not be pursuing human reproductive
cloning, all of the techniques we continue to develop for use in agricultural
cloning and our nuclear transfer work for organ regeneration are directly
applicable to human cloning should some other group in the future decide to
pursue this avenue. Negative associations with any or all of these practices
could:

     o    harm our ability to establish critical partnerships and
          collaborations;

     o    prompt government regulation of our technologies;

     o    cause delays in our research and development; and

     o    cause a decrease in the price of our stock.

     Human therapeutic cloning based on nuclear transfer may be useful for the
development of our regenerative medicine applications. If human therapeutic
cloning is restricted or banned (as it would be under bill H.R. 2505 recently
passed by the U.S. House of Representatives), our ability to commercialize those
applications could be significantly harmed. Also, if regulatory bodies were to
ban nuclear transfer processes, our research using nuclear transfer technology
could be cancelled and our business could be significantly harmed.


                                       4

   8

PUBLIC ATTITUDES TOWARDS GENE THERAPY MAY NEGATIVELY AFFECT REGULATORY APPROVAL
OR PUBLIC PERCEPTION OF OUR PRODUCTS

     The commercial success of our product candidates will depend in part on
public acceptance of the use of gene therapies for the prevention or treatment
of human diseases. Public attitudes may be influenced by claims that gene
therapy is unsafe, and gene therapy may not gain the acceptance of the public or
the medical community. Adverse events in the field of gene therapy that have
occurred or may occur in the future also may result in greater governmental
regulation of our product candidates and potential regulatory delays relating to
the testing or approval of our product candidates.

     Negative public reaction to gene therapy in the development of certain of
our therapies could result in greater government regulation, stricter clinical
trial oversight, restrictive commercial product labeling requirements of gene
therapies, and could cause a decrease in the demand for any products that we may
develop. The subject of genetically modified organisms has received negative
publicity in Europe, which has aroused public debate. The adverse publicity in
Europe could lead to greater regulation and trade restrictions on imports of
genetically altered products. If similar adverse public reaction occurs in the
United States, genetic research and resultant products could be subject to
greater domestic regulation and could cause a decrease in the demand for our
potential products.

EVEN IF WE REACH CLINICAL TRIALS WITH ONE OR MORE OF OUR PRODUCTS, THEY MAY NOT
RESULT IN ANY COMMERCIALLY VIABLE PRODUCTS

     We do not expect to generate any significant revenues from product sales
for a period of several years. We may never generate revenues from product sales
or become profitable because of a variety of risks inherent in our business,
including risks that:

     o    clinical trials may not demonstrate the safety and efficacy of our
          products;

     o    completion of clinical trials may be delayed, or costs of clinical
          trials may exceed anticipated amounts;

     o    we may not be able to obtain regulatory approval of our products, or
          may experience delays in obtaining such approvals;

     o    we may not be able to manufacture our drugs economically on a
          commercial scale;

     o    we and our licensees may not be able to successfully market our
          products;

     o    physicians may not prescribe our products, or patients may not accept
          such products;

     o    others may have proprietary rights which prevent us from marketing our
          products; and

     o    competitors may sell similar, superior or lower-cost products.

IMPAIRMENT OF OUR INTELLECTUAL PROPERTY RIGHTS MAY LIMIT OUR ABILITY TO PURSUE
THE DEVELOPMENT OF OUR INTENDED TECHNOLOGIES AND PRODUCTS

     Our success will depend on our ability to obtain and enforce patents for
our discoveries; however, legal principles for biotechnology patents in the
United States and in other countries are not firmly established and the extent
to which we will be able to obtain patent coverage is uncertain.

     Protection of our proprietary compounds and technology is critically
important to our business. Our success will depend in part on our ability to
obtain and enforce our patents and maintain trade secrets, both in the United
States and in other countries. The patent positions of pharmaceutical and
biopharmaceutical companies, including ours, are highly uncertain and involve
complex legal and technical questions for which legal principles are not firmly
established. We may not continue to develop products or processes that are
patentable, and it is possible that patents will not issue from any of our
pending applications, including allowed patent applications. Further, our
current patents, or patents that issue on pending applications, may be
challenged, invalidated or circumvented, and our current or future patent rights
may not provide proprietary protection or competitive advantages to us. In the
event that we are unsuccessful in obtaining and enforcing patents, our business
would be negatively impacted.


                                       5

   9

     Patent applications filed in the United States prior to November 29, 2000,
are maintained in secrecy until patents issue. Publication of discoveries in the
scientific or patent literature tends to lag behind actual discoveries by at
least several months and sometimes several years. Therefore, the publications
may reveal in the future that the persons or entities that we or our licensors
name as inventors in our patents and patent applications may not have been the
first to invent the inventions disclosed in the patent applications or patents,
or file patent applications for these inventions. As a result, we may not be
able to obtain patents from discoveries that we otherwise would consider
patentable and that we consider to be significant to our future success.

     Patent prosecution, interference, opposition proceeding or litigation may
also be necessary to obtain patents, enforce any patents issued or licensed to
us or to determine the scope and validity of our proprietary rights or the
proprietary rights of another. We may not be successful in any patent
prosecution, interference, opposition proceeding or litigation. Patent
prosecution and litigation in general can be extremely expensive and time
consuming, even if the outcome is favorable to us. An adverse outcome in a
patent prosecution or litigation or any other proceeding in a court or patent
office could weaken our proprietary position, subject our business to
significant liabilities to other parties, require disputed rights to be licensed
from other parties or require us to cease using the disputed technology.

WE MAY BE SUBJECT TO INFRINGEMENT CLAIMS THAT ARE COSTLY TO DEFEND, AND WHICH
MAY LIMIT OUR ABILITY TO USE DISPUTED TECHNOLOGIES AND PREVENT US FROM PURSUING
RESEARCH AND DEVELOPMENT OR COMMERCIALIZATION OF POTENTIAL PRODUCTS

     Our commercial success depends significantly on our ability to operate
without infringing patents and proprietary rights of others. Our technologies
may infringe the patents or proprietary rights of others. In addition, we may
become aware of discoveries and technology controlled by third parties that are
advantageous to our research programs. In the event our technologies do infringe
on the rights of others or we require the use of discoveries and technology
controlled by third parties, we may be prevented from pursuing research,
development or commercialization of potential products or may be required to
obtain licenses to these patents or other proprietary rights or develop or
obtain alternative technologies. We may not be able to obtain alternative
technologies or any required license on commercially favorable terms, if at all.
If we do not obtain the necessary licenses or alternative technologies, we may
be delayed or prevented from pursuing the development of some potential
products. Our breach of an existing license or failure to obtain alternative
technologies or a license to any technology that we may require to develop or
commercialize our products will significantly and negatively affect our
business.

     Patent law relating to the scope and enforceability of claims in the
technology fields in which we operate is still evolving, and the degree of
future protection for any of our proprietary rights is highly uncertain. In this
regard, patents may not issue from any of our patent applications or our
existing patents may be found to be invalid by a court. In addition, our success
may become dependent on our ability to obtain licenses for using the patented
discoveries of others. We are aware of patent applications and patents that have
been filed by others with respect to our technologies and we may have to obtain
licenses to use these technologies. Moreover, other patent applications may be
granted priority over patent applications that we or any of our licensors have
filed. Furthermore, others may independently develop similar or alternative
technologies, duplicate any of our technologies or design around the patented
technologies we have developed. In the event that we are unable to acquire
licenses to critical technologies that we cannot patent ourselves, we may be
required to expend significant time and resources to develop alternative
technology, and we may not be successful in this regard. If we cannot acquire or
develop the necessary technology, we may be prevented from pursuing some of our
business objectives. Moreover, one or more of our competitors could acquire or
license the necessary technology. Any of these events could materially harm our
business.


                                       6

   10

MUCH OF THE INFORMATION AND KNOW-HOW THAT IS CRITICAL TO OUR BUSINESS IS NOT
PATENTABLE AND WE MAY NOT BE ABLE TO PREVENT OTHERS FROM OBTAINING THIS
INFORMATION AND ESTABLISHING COMPETITIVE ENTERPRISES

     We sometimes rely on trade secrets to protect our proprietary technology,
especially in circumstances in which patent protection is not believed to be
appropriate or obtainable. We attempt to protect our proprietary technology in
part by confidentiality agreements with our employees, consultants,
collaborators and contractors. We cannot assure you that these agreements will
not be breached, that we would have adequate remedies for any breach, or that
our trade secrets will not otherwise become known or be independently discovered
by competitors, any of which would harm our business significantly.

WE DEPEND ON OUR COLLABORATORS TO HELP US COMPLETE THE PROCESS OF DEVELOPING AND
TESTING OUR PRODUCTS AND OUR ABILITY TO DEVELOP AND COMMERCIALIZE PRODUCTS MAY
BE IMPAIRED OR DELAYED IF OUR COLLABORATIVE PARTNERSHIPS ARE UNSUCCESSFUL

     Our strategy for the development, clinical testing and commercialization of
our products requires entering into collaborations with corporate partners,
licensors, licensees and others. We are dependent upon the subsequent success of
these other parties in performing their respective responsibilities and the
continued cooperation of our partners. Our collaborators may not cooperate with
us or perform their obligations under our agreements with them. We cannot
control the amount and timing of our collaborators' resources that will be
devoted to our research activities related to our collaborative agreements with
them. Our collaborators may choose to pursue existing or alternative
technologies in preference to those being developed in collaboration with us.

     Our ability to successfully develop and commercialize telomerase inhibition
products depends on our corporate alliance with Kyowa Hakko. Our ability to
successfully develop and commercialize telomerase diagnostic products depends on
our corporate alliance with Roche Diagnostics. Under our collaborative
agreements with these collaborators, we rely significantly on them, among other
activities, to:

     o    design and conduct advanced clinical trials in the event that we reach
          clinical trials;

     o    fund research and development activities with us;

     o    pay us fees upon the achievement of milestones; and

     o    co-promote with us any commercial products that result from our
          collaborations.

     The development and commercialization of products from these collaborations
will be delayed if Kyowa Hakko or Roche Diagnostics fail to conduct these
collaborative activities in a timely manner or at all. In addition, Kyowa Hakko
or Roche Diagnostics could terminate their agreements with us and we may not
receive any development or milestone payments. If we do not receive research
funds or achieve milestones set forth in the agreements, or if Kyowa Hakko or
Roche Diagnostics or any of our future collaborators breach or terminate
collaborative agreements with us, our business may be materially harmed.

OUR RELIANCE ON THE RESEARCH ACTIVITIES OF OUR NON-EMPLOYEE SCIENTIFIC ADVISORS
AND OTHER RESEARCH INSTITUTIONS, WHOSE ACTIVITIES ARE NOT WHOLLY WITHIN OUR
CONTROL, MAY LEAD TO DELAYS IN TECHNOLOGICAL DEVELOPMENTS

     We rely extensively and have relationships with scientific advisors at
academic and other institutions, some of whom conduct research at our request.
These scientific advisors are not our employees and may have commitments to, or
consulting or advisory contracts with, other entities that may limit their
availability to us. We have limited control over the activities of these
advisors and, except as otherwise required by our collaboration and consulting
agreements, can expect only limited amounts of their time to be dedicated to our
activities. If our scientific advisors are unable or refuse to contribute to the
development of any of our potential discoveries, our ability to generate
significant advances in our technologies may be significantly harmed.


                                       7

   11

     In addition, we have formed research collaborations with many academic and
other research institutions throughout the world, including the Roslin
Institute. These research facilities may have commitments to other commercial
and non-commercial entities. We have limited control over the operations of
these laboratories and can expect only limited amounts of time to be dedicated
to our research goals.

THE LOSS OF KEY PERSONNEL COULD SLOW OUR ABILITY TO CONDUCT RESEARCH AND DEVELOP
PRODUCTS

     Our future success depends to a significant extent on the skills,
experience and efforts of our executive officers and key members of our
scientific staff. Competition for personnel is intense and we may be unable to
retain our current personnel or attract or assimilate other highly qualified
management and scientific personnel in the future. The loss of any or all of
these individuals could harm our business and might significantly delay or
prevent the achievement of research, development or business objectives.

     We also rely on consultants and advisors, including the members of our
Scientific Advisory Board, who assist us in formulating our research and
development strategy. We face intense competition for qualified individuals from
numerous pharmaceutical, biopharmaceutical and biotechnology companies, as well
as academic and other research institutions. We may not be able to attract and
retain these individuals on acceptable terms. Failure to do so would materially
harm our business.

WE MAY NOT BE ABLE TO OBTAIN OR MAINTAIN SUFFICIENT INSURANCE ON COMMERCIALLY
REASONABLE TERMS OR WITH ADEQUATE COVERAGE AGAINST POTENTIAL LIABILITIES IN
ORDER TO PROTECT OURSELVES AGAINST PRODUCT LIABILITY CLAIMS

     Our business exposes us to potential product liability risks that are
inherent in the testing, manufacturing and marketing of human therapeutic and
diagnostic products. We may become subject to product liability claims if the
use of our products is alleged to have injured subjects or patients. This risk
exists for products tested in human clinical trials as well as products that are
sold commercially. We currently have no clinical trial liability insurance and
we may not be able to obtain and maintain this type of insurance for any of our
clinical trials. In addition, product liability insurance is becoming
increasingly expensive. As a result, we may not be able to obtain or maintain
product liability insurance in the future on acceptable terms or with adequate
coverage against potential liabilities which could have a material adverse
effect on us.

BECAUSE WE OR OUR COLLABORATORS MUST OBTAIN REGULATORY APPROVAL TO MARKET OUR
PRODUCTS IN THE UNITED STATES AND FOREIGN JURISDICTIONS, WE CANNOT PREDICT
WHETHER OR WHEN WE WILL BE PERMITTED TO COMMERCIALIZE OUR PRODUCTS

     Federal, state and local governments in the United States and governments
in other countries have significant regulations in place that govern many of our
activities. The preclinical testing and clinical trials of the products that we
develop ourselves or that our collaborators develop are subject to intense
government regulation and may prevent us from creating commercially viable
products from our discoveries. In addition, the sale by us or our collaborators
of any commercially viable product will be subject to government regulation from
several standpoints, including the processes of:

     o    manufacturing;

     o    advertising and promoting;

     o    selling and marketing;

     o    labeling; and

     o    distributing.


                                       8

   12

     We may not obtain regulatory approval for the products we develop and our
collaborators may not obtain regulatory approval for the products they develop.
Regulatory approval may also entail limitations on the indicated uses of a
proposed product. Because certain of our product candidates involve the
application of new technologies and may be based upon a new therapeutic
approach, such products may be subject to substantial additional review by
various government regulatory authorities, and, as a result, we may obtain
regulatory approvals for such products more slowly than for products based upon
more conventional technologies. If, and to the extent that, we are unable to
comply with these regulations, our ability to earn revenues will be materially
and negatively impacted.

     The regulatory process, particularly for biopharmaceutical products like
ours, is uncertain, can take many years and requires the expenditure of
substantial resources. Any product that we or our collaborative partners develop
must receive all relevant regulatory agency approvals or clearances, if any,
before it may be marketed in the United States or other countries. Generally,
biological drugs and non-biological drugs are regulated more rigorously than
medical devices. In particular, human pharmaceutical therapeutic products,
including a telomerase inhibitor, are subject to rigorous preclinical and
clinical testing and other requirements by the Food and Drug Administration in
the United States and similar health authorities in foreign countries. The
regulatory process, which includes extensive preclinical testing and clinical
trials of each product in order to establish its safety and efficacy, is
uncertain, can take many years and requires the expenditure of substantial
resources.

     Data obtained from preclinical and clinical activities is susceptible to
varying interpretations that could delay, limit or prevent regulatory agency
approvals or clearances. In addition, delays or rejections may be encountered
based upon changes in regulatory agency policy during the period of product
development and/or the period of review of any application for regulatory agency
approval or clearance for a product. Delays in obtaining regulatory agency
approvals or clearances could:

     o    significantly harm the marketing of any products that we or our
          collaborators develop;

     o    impose costly procedures upon our activities or the activities of our
          collaborators;

     o    diminish any competitive advantages that we or our collaborative
          partners may attain; or

     o    adversely affect our ability to receive royalties and generate
          revenues and profits.

     Even if we commit the necessary time and resources, both economic and
otherwise, the required regulatory agency approvals or clearances may not be
obtained for any products developed by or in collaboration with us. If
regulatory agency approval or clearance for a new product is obtained, this
approval or clearance may entail limitations on the indicated uses for which it
may be marketed that could limit the potential commercial use of the product.
Furthermore, approved products and their manufacturers are subject to continual
review, and discovery of previously unknown problems with a product or its
manufacturer may result in restrictions on the product or manufacturer,
including withdrawal of the product from the market. Failure to comply with
regulatory requirements can result in severe civil and criminal penalties,
including but not limited to:

     o    recall or seizure of products;

     o    injunction against manufacture, distribution, sales and marketing; and

     o    criminal prosecution.

     The imposition of any of these penalties could significantly impair our
business, financial condition and results of operations.


                                       9

   13

TO BE SUCCESSFUL, OUR PRODUCTS MUST BE ACCEPTED BY THE HEALTH CARE COMMUNITY,
WHICH CAN BE VERY SLOW TO ADOPT OR UNRECEPTIVE TO NEW TECHNOLOGIES AND PRODUCTS

     Our products and those developed by our collaborative partners, if approved
for marketing, may not achieve market acceptance since physicians, patients or
the medical community in general may decide not to accept and utilize these
products. The products that we are attempting to develop may represent
substantial departures from established treatment methods and will compete with
a number of traditional drugs and therapies manufactured and marketed by major
pharmaceutical companies. The degree of market acceptance of any of our
developed products will depend on a number of factors, including:

     o    our establishment and demonstration to the medical community of the
          clinical efficacy and safety of our product candidates;

     o    our ability to create products that are superior to alternatives
          currently on the market;

     o    our ability to establish in the medical community the potential
          advantage of our treatments over alternative treatment methods; and

     o    reimbursement policies of government and third-party payors.

     If the health care community does not accept our products for any of the
foregoing reasons, or for any other reason, our business would be materially
harmed.

THE REIMBURSEMENT STATUS OF NEWLY-APPROVED HEALTH CARE PRODUCTS IS UNCERTAIN AND
FAILURE TO OBTAIN REIMBURSEMENT APPROVAL COULD SEVERELY LIMIT THE USE OF OUR
PRODUCTS

     Significant uncertainty exists as to the reimbursement status of newly
approved health care products, including pharmaceuticals. If we fail to generate
adequate third party reimbursement for the users of our potential products and
treatments, then we may be unable to maintain price levels sufficient to realize
an appropriate return on our investment in product development.

     In both domestic and foreign markets, sales of our products, if any, will
depend in part on the availability of reimbursement from third-party payors,
examples of which include:

     o    government health administration authorities;

     o    private health insurers;

     o    health maintenance organizations; and

     o    pharmacy benefit management companies.

     Both federal and state governments in the United States and foreign
governments continue to propose and pass legislation designed to contain or
reduce the cost of health care through various means. Legislation and
regulations affecting the pricing of pharmaceuticals and other medical products
may change or be adopted before any of our potential products are approved for
marketing. Cost control initiatives could decrease the price that we receive for
any product we may develop in the future. In addition, third-party payors are
increasingly challenging the price and cost-effectiveness of medical products
and services and any of our potential products and treatments may ultimately not
be considered cost effective by these third parties. Any of these initiatives or
developments could materially harm our business.

OUR ACTIVITIES INVOLVE HAZARDOUS MATERIALS AND IMPROPER HANDLING OF THESE
MATERIALS BY OUR EMPLOYEES OR AGENTS COULD EXPOSE US TO SIGNIFICANT LEGAL AND
FINANCIAL PENALTIES

     Our research and development activities involve the controlled use of
hazardous materials, chemicals and various radioactive compounds. As a
consequence, we are subject to numerous environmental and safety laws and
regulations, including those governing laboratory procedures, exposure to
blood-borne pathogens and the handling of biohazardous materials. We may be
required to incur significant costs to comply with current or future
environmental laws and regulations and may be adversely affected by the cost of
compliance with these laws and regulations.


                                       10

   14

     Although we believe that our safety procedures for using, handling, storing
and disposing of hazardous materials comply with the standards prescribed by
state and federal regulations, the risk of accidental contamination or injury
from these materials cannot be eliminated. In the event of such an accident,
state or federal authorities could curtail our use of these materials and we
could be liable for any civil damages that result, the cost of which could be
substantial. Further, any failure by us to control the use, disposal, removal or
storage of, or to adequately restrict the discharge of, or assist in the cleanup
of, hazardous chemicals or hazardous, infectious or toxic substances could
subject us to significant liabilities, including joint and several liability
under certain statutes, and any liability could exceed our resources and could
have a material adverse effect on our business, financial condition and results
of operations. Additionally, an accident could damage our research and
manufacturing facilities and operations.

     Additional federal, state and local laws and regulations affecting us may
be adopted in the future. We may incur substantial costs to comply with and
substantial fines or penalties if we violate any of these laws or regulations.

OUR STOCK PRICE HAS HISTORICALLY BEEN VERY VOLATILE

     Stock prices and trading volumes for many biopharmaceutical companies
fluctuate widely for a number of reasons, including some reasons which may be
unrelated to their businesses or results of operations such as media coverage,
legislation and regulatory measures and the activities of various protest groups
or organizations. This market volatility, as well as general domestic or
international economic, market and political conditions, could materially and
adversely affect the market price of our common stock and your return on your
investment.

     Historically, our stock price has been extremely volatile. Between January
1998 and September 25, 2001, our stock has traded as high as $75.88 per share
and as low as $3.50 per share. The significant market price fluctuations of our
common stock are due to a variety of factors, including:

     o    depth of the market for the common stock;

     o    the experimental nature of our prospective products;

     o    fluctuations in our operating results;

     o    market conditions relating to the biopharmaceutical and pharmaceutical
          industries;

     o    any announcements of technological innovations, new commercial
          products or clinical progress or lack thereof by us, our collaborative
          partners or our competitors; and

     o    announcements concerning regulatory developments, developments with
          respect to proprietary rights and our collaborations.

     In addition, the stock market is subject to other factors outside our
control that can cause extreme price and volume fluctuations. Securities class
action litigation has often been brought against companies, including many
biotechnology companies, when they experience volatility in the market price of
their securities. Litigation brought against us could result in substantial
costs and a diversion of management's attention and resources, which could
adversely affect our business.

THE SALE OF A SUBSTANTIAL NUMBER OF SHARES, INCLUDING SHARES THAT WILL BECOME
ELIGIBLE FOR SALE IN THE NEAR FUTURE, MAY ADVERSELY AFFECT THE MARKET PRICE FOR
OUR COMMON STOCK

     Sales of substantial number of shares of our common stock in the public
market could significantly and negatively affect the market price for our common
stock. As of June 30, 2001, we had 21,845,750 shares of common stock
outstanding. Of these shares, 10,284,534 shares were issued (including shares
issuable upon conversion or exercise of convertible notes or warrants) since
December 1998 pursuant to private placements. Of these shares, 9,423,463 shares
have been registered pursuant to shelf registration statements and therefore may
be resold (if not sold prior to the date hereof) in the public market and
861,071 of the remaining shares may be resold pursuant to Rule 144 into the
public markets as early as March 9, 2002, upon the expiration of a lockup
agreement with us.


                                       11

   15

OUR UNDESIGNATED PREFERRED STOCK MAY INHIBIT POTENTIAL ACQUISITION BIDS; THIS
MAY ADVERSELY AFFECT THE MARKET PRICE OF OUR COMMON STOCK AND THE VOTING RIGHTS
OF THE HOLDERS OF COMMON STOCK

     Our certificate of incorporation provides our Board of Directors with the
authority to issue up to 3,000,000 shares of undesignated preferred stock and to
determine the rights, preferences, privileges and restrictions of these shares
without further vote or action by the stockholders. As of the date of this Form
S-3, the Board of Directors still has authority to designate and issue up to
2,950,000 shares of preferred stock. The rights of the holders of common stock
will be subject to, and may be adversely affected by, the rights of the holders
of any preferred stock that may be issued in the future. The issuance of shares
of preferred stock may delay or prevent a change in control transaction without
further action by our stockholders. As a result, the market price of our common
stock may be adversely affected. The issuance of preferred stock may also result
in the loss of voting control by others.

PROVISIONS IN OUR CHARTER AND BYLAWS, AND PROVISIONS OF DELAWARE LAW, MAY
INHIBIT POTENTIAL ACQUISITION BIDS FOR US, WHICH MAY PREVENT HOLDERS OF OUR
COMMON STOCK FROM BENEFITING FROM WHAT THEY MAY BELIEVE MAY BE THE POSITIVE
ASPECTS OF ACQUISITIONS AND TAKEOVERS

     In addition to the undesignated preferred stock, provisions of our charter
documents and bylaws may make it substantially more difficult for a third party
to acquire control of us and may prevent changes in our management, including
provisions that:

     o    prevent stockholders from taking actions by written consent;

     o    divide the Board of Directors into separate classes with terms of
          office that are structured to prevent all of the directors from being
          elected in any one year; and

     o    set forth procedures for nominating directors and submitting proposals
          for consideration at stockholders' meetings.

     Our Board of Directors has adopted a stockholder rights plan, commonly
referred to as a "poison pill". This plan entitles existing stockholders to
rights, including the right to purchase shares of common stock, in the event of
an acquisition of 15% or more of our outstanding common stock. In addition, our
Board of Directors has the authority, without further action by our
stockholders, to issue additional shares of common stock, to fix the rights and
preferences of, and to issue authorized but undesignated shares of preferred
stock.

     Provisions of Delaware law may also inhibit potential acquisition bids for
us or prevent us from engaging in business combinations. Either collectively or
individually, these provisions may prevent holders of our common stock from
benefiting from what they may believe are the positive aspects of acquisitions
and takeovers, including the potential realization of a higher rate of return on
their investment from these types of transactions.

                           FORWARD-LOOKING STATEMENTS

     This prospectus and the documents incorporated by reference into this
prospectus contain forward-looking statements that are based on current
expectations, estimates and projections about our industry, management's
beliefs, and assumptions made by management. Words such as "anticipates,"
"expects," "intends," "plans," "believes," "seeks," "estimates," and variations
of such words and similar expressions are intended to identify such
forward-looking statements. These statements are not guarantees of future
performance and are subject to certain risks, uncertainties and assumptions that
are difficult to predict; therefore, actual results may differ materially from
those expressed or forecasted in any forward-looking statements. The risks and
uncertainties include those noted in "Risk Factors" above and in the documents
incorporated by reference. We undertake no obligation to update publicly any
forward-looking statements, whether as a result of new information, future
events or otherwise.


                                       12

   16

                                 USE OF PROCEEDS

     The proceeds from the sale of the common stock sold pursuant to this
prospectus will belong to the selling stockholder. We will not receive any
proceeds from such sales.

                               SELLING STOCKHOLDER

     The following table sets forth the name of the selling stockholder, the
number of shares of common stock owned beneficially by the selling stockholder
as of September __, 2001, the number of shares which may be offered pursuant to
this prospectus and the number of shares to be owned by the selling stockholder
after this offering. The selling stockholder may sell up to 200,000 shares of
our common stock pursuant to this prospectus. Since the selling stockholder may
offer all, some or none of its common stock, no definitive estimate as to the
number of shares thereof that will be held by the selling stockholder after the
offering can be provided. In addition, since the date the selling stockholders
provided information regarding their ownership of the shares, they may have
sold, transferred or otherwise disposed of all or a portion of their shares of
common stock in transactions exempt from the registration requirements of the
Securities Act. Information concerning the selling stockholder may change from
time to time and, when necessary, any changed information will be set forth in a
prospectus supplement to this prospectus.

     On August 30, 2001, we issued a total of 100,000 shares of our common stock
to University Technology Corporation pursuant to a common stock purchase
agreement with University Technology Corporation. On August 30, 2001, we also
issued to University Technology Corporation a warrant to purchase up to 100,000
shares of our common stock at a purchase price of $14.60 per share, pursuant to
a common stock warrant agreement dated as of August 30, 2001. The warrant is
exercisable for a period of ten years after the date of issuance. The number of
shares that we have registered is based upon the actual number of shares issued
to the selling stockholder pursuant to the common stock purchase agreement and
the maximum number issuable upon exercise of the warrant.

     To our knowledge, the stockholder named in the table has sole voting and
investment power with respect to all shares of common stock beneficially owned.
This information is based upon information provided by the selling stockholder.



                                           Shares
                                     Beneficially Owned    Shares Being   Shares Owned   After Offering
               Name                  Prior to Offering       Offered          Number       Percentage
---------------------------------    ------------------    ------------   ------------   --------------
                                                                              
University Technology Corporation         207,000(1)         200,000        207,000           *


-------------------
 *   Less than 1%

(1)  Includes 2,000 shares held by University Technology Corporation as of
     September 7, 2001, and 5,000 shares subject to warrant exercisable within
     60 days of the date hereof.


                                       13

   17

                              PLAN OF DISTRIBUTION

     We are registering 200,000 shares of our common stock on behalf of the
selling stockholder. The selling stockholder and any of its pledgees, assignees
and successors-in-interest may, from time to time, sell any or all of the shares
of common stock offered hereby on any stock exchange, market or trading facility
on which the shares are traded or in private transactions. These sales may be at
fixed or negotiated prices. The selling stockholder may use any one or more of
the following methods when selling shares:

     o    ordinary brokerage transactions and transactions in which the
          broker-dealer solicits purchasers;

     o    block trades in which the broker-dealer will attempt to sell the
          shares as agent but may position and resell a portion of the block as
          principal to facilitate the transaction;

     o    purchases by a broker-dealer as principal and resale by the
          broker-dealer for its account;

     o    an exchange distribution in accordance with the rules of the
          applicable exchange;

     o    privately negotiated transactions;

     o    short sales;

     o    broker-dealers may agree with the selling stockholder to sell a
          specified number of such shares at a stipulated price per share;

     o    a combination of any such methods of sale; and

     o    any other method permitted pursuant to applicable law.

The selling stockholder may also sell shares under Rule 144 under the Securities
Act, if available, rather than under this prospectus.

     The selling stockholder may also engage in short sales against the box,
puts and calls and other transactions in our securities or derivatives of our
securities and may sell or deliver shares in connection with these trades. The
selling stockholder may pledge its shares to its brokers under the margin
provisions of customer agreements. If the selling stockholder defaults on a
margin loan, the broker may, from time to time, offer and sell the pledged
shares. The selling stockholder has advised us that it has not entered into any
agreements, understandings or arrangements with any underwriters or
broker-dealers regarding the sale of its shares other than ordinary course
brokerage arrangements, nor is there an underwriter or coordinating broker
acting in connection with the proposed sale of shares by the selling
stockholder.

     Broker-dealers engaged by the selling stockholder may arrange for other
brokers-dealers to participate in sales. Broker-dealers may receive commissions
or discounts from the selling stockholder, or, if any broker-dealer acts as
agent for the purchaser of shares, from the purchaser, in amounts to be
negotiated. The selling stockholder does not expect these commissions and
discounts to exceed what is customary in the types of transactions involved.

     The selling stockholder and any broker-dealers or agents that are involved
in selling the shares may be deemed to be "underwriters" within the meaning of
the Securities Act in connection with such sales. In such event, any commissions
received by such broker-dealers or agents and any profit on the resale of the
shares purchased by them may be deemed to be underwriting commissions or
discounts under the Securities Act.


                                       14

   18

     Upon notification to us by the selling stockholder that any material
arrangement has been entered into with a broker-dealer for the sale of shares
through a block trade, special offering, exchange distribution or secondary
distribution or a purchase by a broker or dealer, we will file a supplement to
this prospectus, if required, pursuant to Rule 424(b) under the Securities Act,
disclosing the following:

     o    the name of the selling stockholder and of the participating
          broker-dealer(s);

     o    the number of shares involved;

     o    the price at which such shares were sold;

     o    the commissions paid or discounts or concessions allowed to such
          broker-dealer(s), where applicable;

     o    that such broker-dealer(s) did not conduct any investigation to
          verify the information set out or incorporated by reference in this
          prospectus; and

     o    other facts material to the transaction.

In addition, we will file a supplement to this prospectus when the selling
stockholder notifies us that a donee or pledgee intends to sell more than 500
shares of our common stock.

     We have advised the selling stockholder that the anti-manipulation
provisions of Regulation M promulgated under the Securities Exchange Act of 1934
may apply to their sales of our shares offered by this prospectus.

                                  LEGAL MATTERS

     Latham & Watkins will pass on the validity of the issuance of the shares of
common stock offered by this prospectus.

                                     EXPERTS

     The consolidated financial statements of Geron Corporation at December 31,
2000 and 1999, and for each of the three years in the period ended December 31,
2000 incorporated by reference in this prospectus and registration statement
have been audited by Ernst & Young LLP, independent auditors, as set forth in
their report thereon appearing elsewhere herein, and are included in reliance
upon such report given on the authority of such firm as experts in accounting
and auditing.

        LIMITATION ON LIABILITY AND DISCLOSURE OF COMMISSION POSITION ON
                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

     Our bylaws provide for indemnification of our directors and officers to the
fullest extent permitted by law. Insofar as indemnification for liabilities
under the Securities Act may be permitted to directors, officers or controlling
persons of Geron pursuant to Geron's Certificate of Incorporation, bylaws and
the Delaware General Corporation Law, Geron has been informed that in the
opinion of the SEC such indemnification is against public policy as expressed in
the Securities Act and is therefore unenforceable.


                                       15

   19

                       WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and special reports, proxy statements and other
information with the SEC. You may read and copy any document we file at the
SEC's public reference room located at 450 Fifth Street, N.W., Washington, D.C.
20549. Please call the SEC at 1-800-SEC-0330 for further information on the
public reference room. Our SEC filings are also available to the public at the
SEC's web site at http://www.sec.gov. You may also inspect copies of these
materials and other information about us at the offices of the Nasdaq Stock
Market, Inc., National Market System, 1735 K Street, N.W., Washington, D.C.
20006-1500.

     The SEC allows us to "incorporate by reference" the information we file
with them which means that we can disclose important information to you by
referring you to those documents instead of having to repeat the information in
this prospectus. The information incorporated by reference is considered to be
part of this prospectus, and later information that we file with the SEC will
automatically update and supersede this information. We incorporate by reference
the documents listed below and any future filings made with the SEC under
Sections 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934 until
the selling stockholder sells all the shares:

     o    Our annual report on Form 10-K for the fiscal year ended December 31,
          2000;

     o    Our definitive proxy statement filed pursuant to Section 14 of the
          Exchange Act in connection with our 2001 Annual Meeting of
          Stockholders;

     o    Our current reports on Form 8-K filed July 23, 2001 and August 22,
          2001;

     o    Our Quarterly Reports on Form 10-Q for the fiscal quarters ended March
          31, 2001 and June 30, 2001; and

     o    The description of our common stock set forth in our registration
          statement on Form 8-A, filed with the Commission on June 13, 1996
          (File No. 0-20859).

     We have filed with the SEC a registration statement on Form S-3 under the
Securities Act. This prospectus does not contain all of the information in the
registration statement. We have omitted certain parts of the registration
statement, as permitted by the rules and regulations of the SEC. You may inspect
and copy the registration statement, including exhibits, at the SEC's public
reference room or internet site. Our statements in this prospectus about the
contents of any contract or other document are not necessarily complete. You
should refer to the copy of each contract or other document we have filed as an
exhibit to the registration statement for complete information.

     We will furnish without charge to you, on written or oral request, a copy
of any or all of the documents incorporated by reference, including exhibits to
these documents. You should direct any requests for documents to David L.
Greenwood, Chief Financial Officer, Geron Corporation, 230 Constitution Drive,
Menlo Park, California 94025, telephone: (650) 473-7700.


                                       16

   20

================================================================================




                         200,000 SHARES OF COMMON STOCK

                                GERON CORPORATION

                                   PROSPECTUS

                               SEPTEMBER __, 2001








YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED OR INCORPORATED BY REFERENCE
IN THIS PROSPECTUS. WE HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH DIFFERENT
INFORMATION. YOU SHOULD NOT ASSUME THAT THE INFORMATION CONTAINED OR
INCORPORATED BY REFERENCE IN THIS PROSPECTUS IS ACCURATE AS OF ANY DATE OTHER
THAN THE DATE OF THIS PROSPECTUS. WE ARE NOT MAKING AN OFFER OF THESE SECURITIES
IN ANY STATE WHERE THE OFFER IS NOT PERMITTED.



================================================================================

   21

                                     PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

     The following sets forth the costs and expenses, all of which shall be
borne by the Registrant, in connection with the offering of the securities
pursuant to this Registration Statement:

         Registration Fee                               $   602.00
         Accounting Fees and Expenses                   $ 3,000.00*
         Legal Fees and Expenses                        $25,000.00*
         Miscellaneous                                  $ 1,500.00*
                                                        ----------
             Total                                      $30,102.00*
                                                        ==========
----------
*    Estimated

Item 15. Indemnification of Directors and Officers.

     Section 145 of the Delaware General Corporation Law allows for the
indemnification of officers, directors, and other corporate agents in terms
sufficiently broad to indemnify these persons for liabilities (including
reimbursement for expenses incurred) arising under the Securities Act. The
registrant's certificate of incorporation and bylaws provide for indemnification
of the registrant's directors, officers, employees and other agents to the
extent and under the circumstances permitted by the Delaware General Corporation
Law. The registrant has also entered into agreements with its directors and
officers that will require the registrant, among other things, to indemnify them
against liabilities that may arise by reason of their status or service as
directors to the fullest extent not prohibited by law. In addition, the
registrant carries director and officer liability insurance.

Item 16. Exhibits.

Exhibits      Description
--------      -----------
   4.1        First Amendment to Intellectual Property License Agreement dated
              July 23, 2001, by and among Registrant and University Technology
              Corporation.

   4.2        Common Stock Purchase Agreement dated as of August 30, 2001, by
              and among Registrant and University Technology Corporation.

   4.3        Common Stock Warrant Agreement issued by Registrant to University
              Technology Corporation, dated as of August 30, 2001.

   5.1*       Opinion of Latham & Watkins.

  23.1*       Consent of Latham & Watkins (included in Exhibit 5).

  23.2        Consent of Ernst & Young LLP, Independent Auditors.

  24.1        Power of Attorney (included on the signature page to this
              Registration Statement).

-------------
*  To be filed by amendment.

Item 17. Undertakings.

     (a) The undersigned registrant hereby undertakes:

          (1) To file, during any period in which it offers or sells securities,
a post-effective amendment to this registration statement to include any
additional or changed information on the plan of distribution.

          (2) That, for the purpose of determining any liability under the
Securities Act, each post-effective amendment shall be treated as a new
registration statement of the securities offered, and the offering of the
securities at that time to be deemed the initial bona fide offering.

          (3) To file a post-effective amendment to remove from registration any
of the securities that remain unsold at the end of the offering.


                                      II-1


   22

     (b) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to section 13(a) or section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     (c) The undersigned registrant hereby undertakes to deliver or cause to be
delivered with the prospectus, to each person to whom the prospectus is sent or
given, the latest annual report, to security holders that is incorporated by
reference in the prospectus and furnished pursuant to and meeting the
requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of
1934; and, where interim financial information required to be presented by
Article 3 of Regulation S-X is not set forth in the prospectus, to deliver, or
cause to be delivered to each person to whom the prospectus is sent or given,
the latest quarterly report that is specifically incorporated by reference in
the prospectus to provide such interim financial information.

     (d) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.


                                      II-2

   23

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in Menlo Park, State of California, on September 10, 2001.

                                             GERON CORPORATION


                                             By: /s/ David L. Greenwood
                                                 -----------------------------
                                                     David L. Greenwood
                                                     Senior Vice President and
                                                     Chief Financial Officer

                                POWER OF ATTORNEY

     KNOW ALL BY THESE PERSONS PRESENT, that the persons whose signatures appear
below do hereby constitute and appoint Thomas B. Okarma and David L. Greenwood,
or either of them, our true and lawful attorneys-in-fact and agents, each with
full power to sign for us or any of us in our names and in any and all
capacities, any and all amendments (including post-effective amendments) to this
Registration Statement, or any related registration statement that is to be
effective upon filing pursuant to Rule 462(b) under the Securities Act of 1933,
as amended, and to file the same, with all exhibits thereto and other documents
required in connection therewith with the Securities and Exchange Commission
hereby do ratifying and confirming all that each of said attorneys-in-fact, or
either of them, or his or her substitute or substitutes, shall do or cause to be
done by virtue thereof.

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.




Signature                                     Title                    Date
---------                                     -----                    ----
                                                          
/s/ Thomas B. Okarma            Chief Executive Officer,        September 10, 2001
------------------------------  President and Director
    Thomas B. Okarma            (principal executive officer)


/s/ David L. Greenwood          Senior Vice President and       September 10, 2001
------------------------------  Chief Financial Officer
    David L. Greenwood          (principal financial and
                                accounting officer)


/s/ Alexander E. Barkas         Director                        September 10, 2001
------------------------------
    Alexander E. Barkas, Ph.D.


/s/ Edward V. Fritzky           Director                        September 10, 2001
------------------------------
    Edward V. Fritzky


/s/ Thomas D. Kiley             Director                        September 10, 2001
------------------------------
    Thomas D. Kiley


/s/ Robert B. Stein             Director                        September 10, 2001
------------------------------
    Robert B. Stein


/s/ John P. Walker              Director                        September 10, 2001
------------------------------
    John P. Walker


/s/ Patrick J. Zenner           Director                        September 10, 2001
------------------------------
    Patrick J. Zenner



                                      S-1

   24

                                  EXHIBIT INDEX

Exhibits      Description
--------      -----------
   4.1        First Amendment to Intellectual Property License Agreement dated
              July 23, 2001, by and among Registrant and University Technology
              Corporation.

   4.2        Common Stock Purchase Agreement dated as of August 30, 2001, by
              and among Registrant and University Technology Corporation.

   4.3        Common Stock Warrant Agreement issued by Registrant to University
              Technology Corporation, dated as of August 30, 2001.

   5.1*       Opinion of Latham & Watkins.

  23.1*       Consent of Latham & Watkins (included in Exhibit 5).

  23.2        Consent of Ernst & Young LLP, Independent Auditors.

  24.1        Power of Attorney (included on the signature page to this
              Registration Statement).

----------
*  To be filed by amendment.