CELL GENESYS INC
S-8, 1998-07-22
PHARMACEUTICAL PREPARATIONS
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<PAGE>   1


AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 22, 1998
                                                        REGISTRATION NO. 333-
 ===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                   ----------

                                    FORM S-8
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
         
                               CELL GENESYS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                                   ----------

       DELAWARE                                          94-3061375
       --------                                          ---------- 
(STATE OF INCORPORATION)                    (I.R.S. EMPLOYER IDENTIFICATION NO.)

          

                               342 LAKESIDE DRIVE
                              FOSTER CITY, CA 94404
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
  
                                   ----------
 
                            1998 INCENTIVE STOCK PLAN
                            (FULL TITLE OF THE PLAN)

                                   ----------
                              KATHLEEN SEREDA GLAUB
                SENIOR VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
                               CELL GENESYS, INC.
                               342 LAKESIDE DRIVE
                          FOSTER CITY, CALIFORNIA 94404
                                 (650) 425-4400
            (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                                   ----------

                                   Copies to:

                              BARRY E. TAYLOR, ESQ.
                            TREVOR J. CHAPLICK, ESQ.
                        WILSON SONSINI GOODRICH & ROSATI
                            PROFESSIONAL CORPORATION
                               650 PAGE MILL ROAD
                            PALO ALTO, CA 94304-1050
                                 (650) 493-9300


<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------
        TITLE OF SECURITIES            AMOUNT TO BE         PROPOSED          PROPOSED       AMOUNT OF
         TO BE REGISTERED               REGISTERED          MAXIMUM           MAXIMUM       REGISTRATION
                                                         OFFERING PRICE      AGGREGATE          FEE
                                                           PER SHARE       OFFERING PRICE
- --------------------------------------------------------------------------------------------------------
<S>                                    <C>                <C>               <C>               <C>

Common Stock, $.001 par value

- - 1998 Incentive Stock Plan          1,760,000 shares          $7.969(1)      $14,025,440(1)      $4,138
                                                                                      

        TOTAL                        1,760,000 shares          $7.969         $14,025,440         $4,138
                                                                                            
=========================================================================================================
</TABLE>


(1) Estimated in accordance with Rules 457(h) and 457(c) under the Securities
Act solely for the purpose of calculating the registration fee. The estimated
exercise price of $7.969 per share as to 1,760,000 shares subject to future
issuance under the 1998 Incentive Stock Plan is based on the average of the high
and the low prices of a share of the Company's Common Stock as reported on the
Nasdaq National Market on July 16, 1998.

<PAGE>   2


                               CELL GENESYS, INC.
                       REGISTRATION STATEMENT ON FORM S-8

                                     PART II

                 INFORMATION REQUIRED IN REGISTRATION STATEMENT

Item 3. Incorporation of Document by Reference.

        There are hereby incorporated by reference in this Registration
Statement the following documents and information previously filed with the
Securities and Exchange Commission (the "COMMISSION"):

        (a) The Company's Annual Report on Form 10-K for the fiscal year ended
December 31, 1997 filed pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934, as amended (the "EXCHANGE ACT").

        (b) The Company's Quarterly Report on Form 10-Q for the quarter ended
March 31, 1998 filed pursuant to Section 13(a) or 15(d) of the Exchange Act.

        (c) The description of the Registrant's Common Stock and associated
preferred share purchase rights, contained in the Registrant's Registration
Statement on Form 8-A filed with the Commission on March 24, 1992 and August 8,
1995, registering such shares and associated rights pursuant to Section 12 of
the Exchange Act, including any amendment or report updating such descriptions.

        All documents filed by the Company pursuant to Sections 13(a), 13(c), 14
and 15(d) of the Exchange Act subsequent to the filing of this Registration
Statement, and prior to the filing of a post-effective amendment that indicates
that all securities offered have been sold or that deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference in the
Registration Statement and to be part hereof from the date of filing such
documents.

Item 4. Description of Securities.

        Not applicable.

Item 5. Interests of Named Experts and Counsel.

        Not applicable.

Item 6. Indemnification of Directors and Officers.

        Section 145 of the Delaware General Corporation Law authorizes a court
to award or a corporation's Board of Directors to grant indemnification to
directors and officers in terms sufficiently broad to permit such
indemnification under certain circumstances for liabilities (including
reimbursement for expenses incurred) arising under the Securities Act of 1933
(the "SECURITIES ACT"), as amended. The Company has included in its Certificate
of Incorporation a provision that to the fullest extent permitted by Delaware
law, the Company's directors will not be liable for monetary damages for breach
of the directors' fiduciary duty of care to the Company and its stockholders. In
addition, the Company's Bylaws provide that the Company is required to indemnify
its officers and directors to the fullest extent permitted by Delaware law,
including those circumstances in which indemnification would otherwise be
discretionary, and that the Company is required to advance expenses to its

<PAGE>   3

officers and directors as incurred. Further, the Company intends to enter into
indemnification agreements with its officers and directors, providing such
individuals indemnification to the maximum extent permitted by the Delaware
General Corporation Law.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Company pursuant to the Delaware General Corporation Law, the foregoing Bylaw
provision or any Indemnification Agreement, the Company has been informed that
in the opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Securities Act and is therefore
unenforceable.

Item 7. Exemption from Registration Claimed.

        Not applicable.

Item 8. Exhibits.


<TABLE>
<CAPTION>
                  Exhibit                     
                  Number                Description
                  -------               -----------
                     
                   <S>        <C>                       
                    4.1      1998 Incentive Stock Plan.

                    5.1      Opinion of Wilson Sonsini Goodrich & Rosati,
                             P.C.  as  to  legality  of  securities  being
                             registered.

                   23.1      Consent of Wilson Sonsini Goodrich & Rosati,
                             P.C. (contained in Exhibit 5.1).

                   23.2      Consent of Ernst & Young LLP, Independent
                             Auditors.

                   24.1      Power of Attorney (see page II-4).
</TABLE>

Item 9. Undertakings.

        (a)    The undersigned Registrant hereby undertakes:

               (1) To file, during any period in which offers or sales are being
made, a post-effective amendment to this Registration Statement to include any
material information with respect to the plan of distribution not previously
disclosed in the Registration Statement or any material change to such
information in the Registration Statement.

               (2) That, for the purpose of determining liability under the
Securities Act, each such post-effective amendment 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.

               (3) To remove from registration by means of a post-effective
amendment any of the securities being registered that remain unsold at the
termination of the offering.


                                      II-2
<PAGE>   4

        (b) The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filling of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) 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 an initial bona
fide offering thereof.

        (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the Delaware General Corporation Law, the
Certificate of Incorporation of the Registrant, the Bylaws of the Registrant,
Indemnification Agreements entered into between the Registrant and its officers
and directors, 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 Securities 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
Securities Act and will be governed by the final adjudication of such issue.


                                      II-3
<PAGE>   5

                                   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-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Foster City, State of California, on this
22nd day of July, 1998.

                          CELL GENESYS, INC.

                          By: /s/ Kathleen Sereda Glaub
                             ------------------------------------- 
                             Kathleen Sereda Glaub
                             Chief Financial Officer

                                POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints, Kathleen Sereda Glaub, or her
attorney-in-fact, for her in any and all capacities, to sign any and all
amendments to this Registration Statement on Form S-8, and to file the same,
with exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, hereby ratifying and confirming all that
said attorney-in-fact, or her substitute may do or cause to be done by virtue
hereof.

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


<TABLE>
<CAPTION>
              Signature                                  Title                          Date
              ---------                                  -----                          -----
  
<S>                                      <C>                                         <C> 
/s/  STEPHEN A. SHERWIN, M.D.           Chairman of the Board, President, and       July 22, 1998
- ------------------------------          Chief Executive Officer (Principal
Stephen A. Sherwin, M.D.                Executive Officer)
                                                                          
/s/ KATHLEEN SEREDA GLAUB               Senior Vice President and Chief             July 22, 1998
- ------------------------------          Financial Officer (Principal Financial
Kathleen Sereda Glaub                   and Accounting Officer)
                                                                              
/s/ DAVID W. CARTER                     Director                                    July 22, 1998
- ------------------------------
David W. Carter

/s/ JAMES M. GOWER                      Director                                    July 22, 1998
- ------------------------------
James M. Gower

/s/ RAJU S. KUCHERLAPATI, PH.D.         Director                                    July 22, 1998
- -------------------------------
Raju S. Kucherlapati, Ph.D.

/s/ JOSEPH E. MAROUN                    Director                                    July 22, 1998
- -------------------------------
Joseph E. Maroun

/s/ JOHN T. POTTS, JR., M.D.            Director                                    July 22, 1998
- -------------------------------
John T. Potts, Jr., M.D.

/s/ EUGENE L. STEP                      Director                                    July 22, 1998
- -------------------------------
Eugene L. Step

/s/ INDER M. VERMA, PH.D.               Director                                    July 22, 1998
- -------------------------------
Inder M. Verma, Ph.D.
</TABLE>


                                      II-4
<PAGE>   6

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

- --------------------------------------------------------------------------------
                                   EXHIBITS
- --------------------------------------------------------------------------------
                       Registration Statement on Form S-8

                               CELL GENESYS, INC.

                                 July 22, 1998

                                INDEX TO EXHIBITS


<TABLE>
<CAPTION>
  Exhibit                      
   Number                 Description
  -------                 -----------


<S>           <C>                       
4.1           1998 Incentive Stock Plan.

5.1           Opinion of Wilson Sonsini Goodrich & Rosati,
              P.C. as to legality of securities being
              registered.

23.1          Consent of Wilson Sonsini Goodrich & Rosati,
              P.C. (contained in Exhibit 5.1).

23.2          Consent of Ernst & Young LLP, Independent
              Auditors.

24.1          Power of Attorney (see page II-4).
</TABLE>


<PAGE>   7

          (k) "Employee" means any person, including Officers and Directors,
employed by the Company or any Parent or Subsidiary of the Company. A Service
Provider shall not cease to be an Employee in the case of (i) any leave of
absence approved by the Company or (ii) transfers between locations of the
Company or between the Company, its Parent, any Subsidiary, or any successor.
For purposes of Incentive Stock Options, no such leave may exceed ninety days,
unless reemployment upon expiration of such leave is guaranteed by statute or
contract. If reemployment upon expiration of a leave of absence approved by the
Company is not so guaranteed, on the 181st day of such leave any Incentive Stock
Option held by the Optionee shall cease to be treated as an Incentive Stock
Option and shall be treated for tax purposes as a Nonstatutory Stock Option.
Neither service as a Director nor payment of a director's fee by the Company
shall be sufficient to constitute "employment" by the Company.

          (l) "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

          (m) "Fair Market Value" means, as of any date, the value of Common
stock determined as follows:

               (i)   If the Common Stock is listed on any established stock
exchange or national market system, including without limitation the Nasdaq
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its
Fair Market Value shall be the closing sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system on
the date of determination, as reported in The Wall Street Journal or such other
source as the Administrator deems reliable.

               (ii)  If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, the Fair Market Value of
a Share of Common Stock shall be the mean between the high bid and low asked
prices for the Common Stock on the date of determination, as reported in the
Wall Street Journal or such other source as the Administrator deems reliable; or

               (iii) In the absence of an established market for the Common
Stock, the Fair Market Value shall be determined in good faith by the
Administrator.

          (n) "Incentive Stock Option" means an Option intended to qualify as an
incentive stock option within the meaning of Section 422 of the Code and the
regulations promulgated thereunder.

          (o) "Nonstatutory Stock Option" means an Option not intended to
qualify as an Incentive Stock Option.

          (p) "Notice of Grant" means a written or electronic notice evidencing
certain terms and conditions of an individual Option or Stock Purchase Right
grant. The Notice of Grant is part of the Option Agreement.

          (q) "Officer" means a person who is an officer of the Company within
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.


                                      -2-
<PAGE>   8

          (r) "Option" means a stock option granted pursuant to the Plan.

          (s) "Option Agreement" means an agreement between the Company and an
Optionee evidencing the terms and conditions of an individual Option grant. The
Option Agreement is subject to the terms and conditions of the Plan.

          (t) "Option Exchange Program" means a program whereby outstanding
Options are surrendered in exchange for Options with a lower exercise price.

          (u) "Optioned Stock" means the Common Stock subject to an Option or
Stock Purchase Right.

          (v) "Optionee" means the holder of an outstanding Option or Stock
Purchase Right granted under the Plan.

          (w) "Parent" means a "parent corporation", whether now or hereafter
existing, as defined in Section 424(e) of the Code.

          (x) "Plan" means this 1998 Stock Plan.

          (y) "Restricted Stock" means shares of Common Stock acquired pursuant
to a grant of Stock Purchase Rights under Section 11 of the Plan.

          (z) "Restricted Stock Purchase Agreement" means a written agreement
between the Company and the Optionee evidencing the terms and restrictions
applying to stock purchased under a Stock Purchase Right. The Restricted Stock
Purchase Agreement is subject to the terms and conditions of the Plan and the
Notice of Grant.

          (aa) "Rule 16b-3" means Rule 16b-3 of the Exchange Act or any
successor to Rule 16b-3, as in effect when discretion is being exercised with
respect to the Plan.

          (bb) "Section 16(b)" means Section 16(b) of the Exchange Act.

          (cc) "Service Provider" means an Employee, Director or Consultant.

          (dd) "Share" means a share of the Common Stock, as adjusted in
accordance with Section 13 of the Plan.

          (ee) "Stock Purchase Right" means the right to purchase Common Stock
pursuant to Section 11 of the Plan, as evidenced by a Notice of Grant.

          (ff) "Subsidiary" means a "subsidiary corporation", whether now or
hereafter existing, as defined in Section 424(f) of the Code.

     3.   Stock Subject to the Plan. Subject to the provisions of Section 13 of
the Plan, the maximum aggregate number of Shares which may be optioned and sold
under the Plan is 1,760,000 Shares. The Shares may be authorized, but unissued,
or reacquired Common Stock.


                                      -3-
<PAGE>   9

             If an Option or Stock Purchase Right expires or becomes
unexercisable without having been exercised in full, or is surrendered pursuant
to an Option Exchange Program, the unpurchased Shares which were subject thereto
shall become available for future grant or sale under the Plan (unless the Plan
has terminated); provided, however, that Shares that have actually been issued
under the Plan, whether upon exercise of an Option or Right, shall not be
returned to the Plan and shall not become available for future distribution
under the Plan, except that if Shares of Restricted Stock are repurchased by the
Company at their original purchase price, such Shares shall become available for
future grant under the Plan.

     4.   Administration of the Plan.

         (a) Procedure.

               (i)   Multiple Administrative Bodies. The Plan may be
administered by different Committees with respect to different groups of Service
Providers.

               (ii)  Section 162(m). To the extent that the Administrator
determines it to be desirable to qualify Options granted hereunder as
"performance-based compensation" within the meaning of Section 162(m) of the
Code, the Plan shall be administered by a Committee of two or more "outside
directors" within the meaning of Section 162(m) of the Code.

               (iii) Rule 16b-3. To the extent desirable to qualify transactions
hereunder as exempt under Rule 16b-3, the transactions contemplated hereunder
shall be structured to satisfy the requirements for exemption under Rule 16b-3.

               (iv)  Other Administration. Other than as provided above, the
Plan shall be administered by (A) the Board or (B) a Committee, which committee
shall be constituted to satisfy Applicable Laws.

          (b) Powers of the Administrator. Subject to the provisions of the
Plan, and in the case of a Committee, subject to the specific duties delegated
by the Board to such Committee, the Administrator shall have the authority, in
its discretion:

               (i)   to determine the Fair Market Value;

               (ii)  to select the Service Providers to whom Options and Stock
Purchase Rights may be granted hereunder;

               (iii) to determine the number of shares of Common Stock to be
covered by each Option and Stock Purchase Right granted hereunder;

               (iv)  to approve forms of agreement for use under the Plan;

               (v)   to determine the terms and conditions, not inconsistent
with the terms of the Plan, of any Option or Stock Purchase Right granted
hereunder. Such terms and conditions include, but are not limited to, the
exercise price, the time or times when Options or Stock Purchase


                                      -4-
<PAGE>   10

Rights may be exercised (which may be based on performance criteria), any
vesting acceleration or waiver of forfeiture restrictions, and any restriction
or limitation regarding any Option or Stock Purchase Right or the shares of
Common Stock relating thereto, based in each case on such factors as the
Administrator, in its sole discretion, shall determine;

               (vi)   to reduce the exercise price of any Option or Stock
Purchase Right to the then current Fair Market Value if the Fair Market Value of
the Common Stock covered by such Option or Stock Purchase Right shall have
declined since the date the Option or Stock Purchase Right was granted;

               (vii)  to institute an Option Exchange Program;

               (viii) to construe and interpret the terms of the Plan and awards
granted pursuant to the Plan;

               (ix)   to prescribe, amend and rescind rules and regulations
relating to the Plan, including rules and regulations relating to sub-plans
established for the purpose of qualifying for preferred tax treatment under
foreign tax laws;

               (x)    to modify or amend each Option or Stock Purchase Right
(subject to Section 15(c) of the Plan), including the discretionary authority to
extend the post-termination exercisability period of Options longer than is
otherwise provided for in the Plan;
 
               (xi)   to allow Optionees to satisfy withholding tax obligations 
by electing to have the Company withhold from the Shares to be issued upon
exercise of an Option or Stock Purchase Right that number of Shares having a
Fair Market Value equal to the amount required to be withheld. The Fair Market
Value of the Shares to be withheld shall be determined on the date that the
amount of tax to be withheld is to be determined. All elections by an Optionee
to have Shares withheld for this purpose shall be made in such form and under
such conditions as the Administrator may deem necessary or advisable;

               (xii)  to authorize any person to execute on behalf of the
Company any instrument required to effect the grant of an Option or Stock
Purchase Right previously granted by the Administrator;

               (xiii) to make all other determinations deemed necessary or
advisable for administering the Plan.

          (c)  Effect of Administrator's Decision. The Administrator's
decisions, determinations and interpretations shall be final and binding on all
Optionees and any other holders of Options or Stock Purchase Rights.

     5.   Eligibility. Incentive Stock Options may be granted only to Employees.
Nonstatutory Stock Options and Stock Purchase Rights may be granted to Service
Providers.


                                      -5-
<PAGE>   11

     6.   Limitations.

          (a)  Each Option shall be designated in the Option Agreement as either
an Incentive Stock Option or a Nonstatutory Stock Option. However,
notwithstanding such designation, to the extent that the aggregate Fair Market
Value of the Shares with respect to which Incentive Stock Options are
exercisable for the first time by the Optionee during any calendar year (under
all plans of the Company and any Parent or Subsidiary) exceeds $100,000, such
Options shall be treated as Nonstatutory Stock Options. For purposes of this
Section 6(a), Incentive Stock Options shall be taken into account in the order
in which they were granted. The Fair Market Value of the Shares shall be
determined as of the time the Option with respect to such Shares is granted.

          (b)  Neither the Plan nor any Option or Stock Purchase Right shall
confer upon an Optionee any right with respect to continuing the Optionee's
relationship as a Service Provider with the Company, nor shall they interfere in
any way with the Optionee's right or the Company's right to terminate such
relationship at any time, with or without cause.

          (c)  The following limitations shall apply to grants of Options and
Stock Purchase Rights:

               (i)   No Service Provider shall be granted, in any fiscal year of
the Company, Options or Stock Purchase Rights to purchase more than 250,000
Shares.

               (ii)  In connection with his or her initial service, a Service
Provider may be granted Options or Stock Purchase Rights to purchase up to an
additional 250,000 Shares which shall not count against the limit set forth in
subsection (i) above.

               (iii) The foregoing limitations shall be adjusted proportionately
in connection with any change in the Company's capitalization as described in
Section 13.

               (iv)  If an Option is cancelled in the same fiscal year of the
Company in which it was granted (other than in connection with a transaction
described in Section 13), the cancelled Option will be counted against the
limits set forth in subsections (i) and (ii) above. For this purpose, if the
exercise price of an Option is reduced, the transaction will be treated as a
cancellation of the Option and the grant of a new Option.

     7.   Term of Plan. Subject to Section 19 of the Plan, the Plan shall become
effective upon its adoption by the Board. It shall continue in effect for a term
of ten (10) years unless terminated earlier under Section 15 of the Plan.


     8.   Term of Option. The term of each Option shall be stated in the Option
Agreement. In the case of an Incentive Stock Option, the term shall be ten (10)
years from the date of grant or such shorter term as may be provided in the
Option Agreement. Moreover, in the case of an Incentive Stock Option granted to
an Optionee who, at the time the Incentive Stock Option is granted, owns stock
representing more than ten percent (10%) of the total combined voting power of
all classes of stock of the Company or any Parent or Subsidiary, the term of the
Incentive Stock


                                      -6-
<PAGE>   12

Option shall be five (5) years from the date of grant or such shorter term as
may be provided in the Option Agreement.

     9.   Option Exercise Price and Consideration.

          (a)  Exercise Price. The per share exercise price for the Shares to be
issued pursuant to exercise of an Option shall be determined by the
Administrator, subject to the following:

               (i)   In the case of an Incentive Stock Option

                     (A) granted to an Employee who, at the time the Incentive
Stock Option is granted, owns stock representing more than ten percent (10%) of
the voting power of all classes of stock of the Company or any Parent or
Subsidiary, the per Share exercise price shall be no less than 110% of the Fair
Market Value per Share on the date of grant.

                     (B) granted to any Employee other than an Employee
described in paragraph (A) immediately above, the per Share exercise price shall
be no less than 100% of the Fair Market Value per Share on the date of grant.

               (ii)  In the case of a Nonstatutory Stock Option, the per Share
exercise price shall be determined by the Administrator. In the case of a
Nonstatutory Stock Option intended to qualify as "performance-based
compensation" within the meaning of Section 162(m) of the Code, the per Share
exercise price shall be no less than 100% of the Fair Market Value per Share on
the date of grant.

               (iii) Notwithstanding the foregoing, Options may be granted with
a per Share exercise price of less than 100% of the Fair Market Value per Share
on the date of grant pursuant to a merger or other corporate transaction.

          (b)  Waiting Period and Exercise Dates. At the time an Option is
granted, the Administrator shall fix the period within which the Option may be
exercised and shall determine any conditions which must be satisfied before the
Option may be exercised.

          (c)  Form of Consideration. The Administrator shall determine the
acceptable form of consideration for exercising an Option, including the method
of payment. In the case of an Incentive Stock Option, the Administrator shall
determine the acceptable form of consideration at the time of grant. Such
consideration may consist entirely of:

               (i)   cash; 

               (ii)  check;

               (iii) promissory note;

               (iv)  other Shares which (A) in the case of Shares acquired upon
exercise of an option, have been owned by the Optionee for more than six months
on the date of surrender, and


                                      -7-
<PAGE>   13

(B) have a Fair Market Value on the date of surrender equal to the aggregate
exercise price of the Shares as to which said Option shall be exercised; 

     (v)       consideration received by the Company under a cashless exercise
program implemented by the Company in connection with the Plan; 

     (vi)      a reduction in the amount of any Company liability to the
Optionee, including any liability attributable to the Optionee's participation
in any Company-sponsored deferred compensation program or arrangement; 

     (vii)     any combination of the foregoing methods of payment; or 

     (viii)    such other consideration and method of payment for the issuance
of Shares to the extent permitted by Applicable Laws.

     10.  Exercise of Option.

          (a)  Procedure for Exercise; Rights as a Stockholder. Any Option
granted hereunder shall be exercisable according to the terms of the Plan and at
such times and under such conditions as determined by the Administrator and set
forth in the Option Agreement. Unless the Administrator provides otherwise,
vesting of Options granted hereunder shall be tolled during any unpaid leave of
absence except for the following: sick leave, military leave, or any other leave
of absence approved by the Administrator; provided that such leave is for a
period of not more than 90 days or reemployment upon the expiration of such
leave is guaranteed by contract or statute. An Option may not be exercised for a
fraction of a Share.

          An Option shall be deemed exercised when the Company receives: (i)
written or electronic notice of exercise (in accordance with the Option
Agreement) from the person entitled to exercise the Option, and (ii) full
payment for the Shares with respect to which the Option is exercised. Full
payment may consist of any consideration and method of payment authorized by the
Administrator and permitted by the Option Agreement and the Plan. Shares issued
upon exercise of an Option shall be issued in the name of the Optionee or, if
requested by the Optionee, in the name of the Optionee and his or her spouse.
Until the Shares are issued (as evidenced by the appropriate entry on the books
of the Company or of a duly authorized transfer agent of the Company), no right
to vote or receive dividends or any other rights as a stockholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such Shares promptly after the
Option is exercised. No adjustment will be made for a dividend or other right
for which the record date is prior to the date the Shares are issued, except as
provided in Section 13 of the Plan.

          Exercising an Option in any manner shall decrease the number of Shares
thereafter available, both for purposes of the Plan and for sale under the
Option, by the number of Shares as to which the Option is exercised.

          (b)  Termination of Relationship as a Service Provider. If an Optionee
ceases to be a Service Provider, other than upon the Optionee's death or
Disability, the Optionee may exercise


                                      -8-
<PAGE>   14

his or her Option within such period of time as is specified in the Option
Agreement to the extent that the Option is vested on the date of termination
(but in no event later than the expiration of the term of such Option as set
forth in the Option Agreement). In the absence of a specified time in the Option
Agreement, the Option shall remain exercisable for three (3) months following
the Optionee's termination. If, on the date of termination, the Optionee is not
vested as to his or her entire Option, the Shares covered by the unvested
portion of the Option shall revert to the Plan. If, after termination, the
Optionee does not exercise his or her Option within the time specified by the
Administrator, the Option shall terminate, and the Shares covered by such Option
shall revert to the Plan.

          (c)  Disability of Optionee. If an Optionee ceases to be a Service
Provider as a result of the Optionee's Disability, the Optionee may exercise his
or her Option within such period of time as is specified in the Option Agreement
to the extent the Option is vested on the date of termination (but in no event
later than the expiration of the term of such Option as set forth in the Option
Agreement). In the absence of a specified time in the Option Agreement, the
Option shall remain exercisable for twelve (12) months following the Optionee's
termination. If, on the date of termination, the Optionee is not vested as to
his or her entire Option, the Shares covered by the unvested portion of the
Option shall revert to the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

          (d)  Death of Optionee. If an Optionee dies while a Service Provider,
the Option may be exercised within such period of time as is specified in the
Option Agreement (but in no event later than the expiration of the term of such
Option as set forth in the Notice of Grant), by the Optionee's estate or by a
person who acquires the right to exercise the Option by bequest or inheritance,
but only to the extent that the Option is vested on the date of death. In the
absence of a specified time in the Option Agreement, the Option shall remain
exercisable for twelve (12) months following the Optionee's termination. If, at
the time of death, the Optionee is not vested as to his or her entire Option,
the Shares covered by the unvested portion of the Option shall immediately
revert to the Plan. The Option may be exercised by the executor or administrator
of the Optionee's estate or, if none, by the person(s) entitled to exercise the
Option under the Optionee's will or the laws of descent or distribution. If the
Option is not so exercised within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.


          (e)  Buyout Provisions. The Administrator may at any time offer to buy
out for a payment in cash or Shares an Option previously granted based on such
terms and conditions as the Administrator shall establish and communicate to the
Optionee at the time that such offer is made.

     11.  Stock Purchase Rights.

          (a) Rights to Purchase. Stock Purchase Rights may be issued either
alone, in addition to, or in tandem with other awards granted under the Plan
and/or cash awards made outside of the Plan. After the Administrator determines
that it will offer Stock Purchase Rights under the Plan, it shall advise the
offeree in writing or electronically, by means of a Notice of Grant, of the
terms, conditions and restrictions related to the offer, including the number of
Shares that the offeree


                                      -9-
<PAGE>   15

shall be entitled to purchase, the price to be paid, and the time within which
the offeree must accept such offer. The offer shall be accepted by execution of
a Restricted Stock Purchase Agreement in the form determined by the
Administrator.

          (b)  Repurchase Option. Unless the Administrator determines otherwise,
the Restricted Stock Purchase Agreement shall grant the Company a repurchase
option exercisable upon the voluntary or involuntary termination of the
purchaser's service with the Company for any reason (including death or
Disability). The purchase price for Shares repurchased pursuant to the
Restricted Stock Purchase Agreement shall be the original price paid by the
purchaser and may be paid by cancellation of any indebtedness of the purchaser
to the Company. The repurchase option shall lapse at a rate determined by the
Administrator.

          (c)  Other Provisions. The Restricted Stock Purchase Agreement shall
contain such other terms, provisions and conditions not inconsistent with the
Plan as may be determined by the Administrator in its sole discretion.

          (d)  Rights as a Stockholder. Once the Stock Purchase Right is
exercised, the purchaser shall have the rights equivalent to those of a
stockholder, and shall be a stockholder when his or her purchase is entered upon
the records of the duly authorized transfer agent of the Company. No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the Stock Purchase Right is exercised, except as provided in Section 13
of the Plan.

     12.  Non-Transferability of Options and Stock Purchase Rights. Unless
determined otherwise by the Administrator, an Option or Stock Purchase Right may
not be sold, pledged, assigned, hypothecated, transferred, or disposed of in any
manner other than by will or by the laws of descent or distribution and may be
exercised, during the lifetime of the Optionee, only by the Optionee. If the
Administrator makes an Option or Stock Purchase Right transferable, such Option
or Stock Purchase Right shall contain such additional terms and conditions as
the Administrator deems appropriate.

     13.  Adjustments Upon Changes in Capitalization, Dissolution, Merger or
Asset Sale.

          (a)  Changes in Capitalization. Subject to any required action by the
stockholders of the Company, the number of shares of Common Stock covered by
each outstanding Option and Stock Purchase Right, and the number of shares of
Common Stock which have been authorized for issuance under the Plan but as to
which no Options or Stock Purchase Rights have yet been granted or which have
been returned to the Plan upon cancellation or expiration of an Option or Stock
Purchase Right, as well as the price per share of Common Stock covered by each
such outstanding Option or Stock Purchase Right, shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of consideration by the Company; provided, however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration". Such adjustment shall be made by the Board,
whose determination in that respect shall be final, binding and conclusive.
Except as expressly provided herein, no issuance by the Company of shares of
stock of any class, or securities


                                      -10-
<PAGE>   16

convertible into shares of stock of any class, shall affect, and no adjustment
by reason thereof shall be made with respect to, the number or price of shares
of Common Stock subject to an Option or Stock Purchase Right.

          (b)  Dissolution or Liquidation. In the event of the proposed
dissolution or liquidation of the Company, the Administrator shall notify each
Optionee as soon as practicable prior to the effective date of such proposed
transaction. The Administrator in its discretion may provide for an Optionee to
have the right to exercise his or her Option until thirty (30) days prior to
such transaction as to all of the Optioned Stock covered thereby, including
Shares as to which the Option would not otherwise be exercisable. In addition,
the Administrator may provide that any Company repurchase option applicable to
any Shares purchased upon exercise of an Option or Stock Purchase Right shall
lapse as to all such Shares, provided the proposed dissolution or liquidation
takes place at the time and in the manner contemplated. To the extent it has not
been previously exercised, an Option or Stock Purchase Right will terminate
immediately prior to the consummation of such proposed action. 

          (c)  Merger or Asset Sale. In the event of a merger of the Company
with or into another corporation, or the sale of substantially all of the assets
of the Company, each outstanding Option and Stock Purchase Right shall be
assumed or an equivalent option or right substituted by the successor
corporation or a Parent or Subsidiary of the successor corporation. In the event
that the successor corporation refuses to assume or substitute for the Option or
Stock Purchase Right, the Optionee shall fully vest in and have the right to
exercise the Option or Stock Purchase Right as to all of the Optioned Stock,
including Shares as to which it would not otherwise be vested or exercisable. If
an Option or Stock Purchase Right becomes fully vested and exercisable in lieu
of assumption or substitution in the event of a merger or sale of assets, the
Administrator shall notify the Optionee in writing or electronically that the
Option or Stock Purchase Right shall be fully vested and exercisable for a
period of thirty (30) days from the date of such notice, and the Option or Stock
Purchase Right shall terminate upon the expiration of such period. For the
purposes of this paragraph, the Option or Stock Purchase Right shall be
considered assumed if, following the merger or sale of assets, the option or
right confers the right to purchase or receive, for each Share of Optioned Stock
subject to the Option or Stock Purchase Right immediately prior to the merger or
sale of assets, the consideration (whether stock, cash, or other securities or
property) received in the merger or sale of assets by holders of Common Stock
for each Share held on the effective date of the transaction (and if holders
were offered a choice of consideration, the type of consideration chosen by the
holders of a majority of the outstanding Shares); provided, however, that if
such consideration received in the merger or sale of assets is not solely common
stock of the successor corporation or its Parent, the Administrator may, with
the consent of the successor corporation, provide for the consideration to be
received upon the exercise of the Option or Stock Purchase Right, for each Share
of Optioned Stock subject to the Option or Stock Purchase Right, to be solely
common stock of the successor corporation or its Parent equal in fair market
value to the per share consideration received by holders of Common Stock in the
merger or sale of assets.

     14.  Date of Grant. The date of grant of an Option or Stock Purchase Right
shall be, for all purposes, the date on which the Administrator makes the
determination granting such Option or Stock Purchase Right, or such other later
date as is determined by the Administrator. Notice of the


                                      -11-
<PAGE>   17

determination shall be provided to each Optionee within a reasonable time after
the date of such grant.


     15.  Amendment and Termination of the Plan.

          (a)  Amendment and Termination. The Board may at any time amend, 
alter, suspend or terminate the Plan.

          (b)  Stockholder Approval. The Company shall obtain stockholder
approval of any Plan amendment to the extent necessary and desirable to comply
with Applicable Laws.

          (c)  Effect of Amendment or Termination. No amendment, alteration,
suspension or termination of the Plan shall impair the rights of any Optionee,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers granted to it hereunder with respect to Options granted under the
Plan prior to the date of such termination.

     16.  Conditions Upon Issuance of Shares.

          (a)  Legal Compliance. Shares shall not be issued pursuant to the
exercise of an Option or Stock Purchase Right unless the exercise of such Option
or Stock Purchase Right and the issuance and delivery of such Shares shall
comply with Applicable Laws and shall be further subject to the approval of
counsel for the Company with respect to such compliance.

          (b)  Investment Representations. As a condition to the exercise of an
Option or Stock Purchase Right, the Company may require the person exercising
such Option or Stock Purchase Right to represent and warrant at the time of any
such exercise that the Shares are being purchased only for investment and
without any present intention to sell or distribute such Shares if, in the
opinion of counsel for the Company, such a representation is required.

          (c)  Inability to Obtain Authority. The inability of the Company to
obtain authority from any regulatory body having jurisdiction, which authority
is deemed by the Company's counsel to be necessary to the lawful issuance and
sale of any Shares hereunder, shall relieve the Company of any liability in
respect of the failure to issue or sell such Shares as to which such requisite
authority shall not have been obtained.

     17.  Reservation of Shares. The Company, during the term of this Plan, will
at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

     18.  Stockholder Approval. The Plan shall be subject to approval by the
stockholders of the Company within twelve (12) months after the date the Plan is
adopted. Such stockholder approval shall be obtained in the manner and to the
degree required under Applicable Laws.


                                      -12-
<PAGE>   18

                                                       1998 INCENTIVE STOCK PLAN

                              NOTICE OF STOCK GRANT

       [Optionee's Name and Address]

       You have been granted an option to purchase Common Stock of the Company,
subject to the terms and conditions of the Plan and this Option Agreement, as
follows:

       Grant Number                         
                                            -------------------------  
       Date of Grant                        
                                            -------------------------  
       Vesting Commencement Date            
                                            -------------------------  
       Exercise Price per Share             $
                                              -----------------------  

       Total Number of Shares Granted       
                                            -------------------------  

       Total Exercise Price                 $
                                              -----------------------  

       Type of Option:                      ---   Incentive Stock Option
                                              
                                            ---   Nonstatutory Stock Option

       Term/Expiration Date:                
                                            ------------------------- 

<PAGE>   19

                                                       1998 INCENTIVE STOCK PLAN

                             STOCK OPTION AGREEMENT

       Unless otherwise defined herein, the terms defined in the Plan shall have
the same defined meanings in this Option Agreement.

I.      AGREEMENT


        1.     Grant of Option. The Plan Administrator of the Company hereby
grants to the Optionee named in the Notice of Grant attached as Part I of this
Agreement (the "Optionee") an option (the "Option") to purchase the number of
Shares, as set forth in the Notice of Grant, at the exercise price per share set
forth in the Notice of Grant (the "Exercise Price"), subject to the terms and
conditions of the Plan, which is incorporated herein by reference. Subject to
Section 15(c) of the Plan, in the event of a conflict between the terms and
conditions of the Plan and the terms and conditions of this Option Agreement,
the terms and conditions of the Plan shall prevail.

               If designated in the Notice of Grant as an Incentive Stock Option
("ISO"), this Option is intended to qualify as an Incentive Stock Option under
Section 422 of the Code. However, if this Option is intended to be an Incentive
Stock Option, to the extent that it exceeds the $100,000 rule of Code Section
422(d) it shall be treated as a Nonstatutory Stock Option ("NSO").


        2.     Exercise of Option.

               (a) Right to Exercise. This Option is exercisable during its
term in accordance with the Vesting Schedule set out in the Notice of Grant and
the applicable provisions of the Plan and this Option Agreement.

               (b) Method of Exercise. This Option is exercisable by delivery
of an exercise notice, in the form attached as Exhibit A (the "Exercise
Notice"), which shall state the election to exercise the Option, the number of
Shares in respect of which the Option is being exercised (the "Exercised
Shares"), and such other representations and agreements as may be required by
the Company pursuant to the provisions of the Plan. The Exercise Notice shall be
completed by the Optionee and delivered to the Stock Plan Administrator of the
Company. The Exercise Notice shall be accompanied by payment of the aggregate
Exercise Price as to all Exercised Shares. This Option shall be deemed to be
exercised upon receipt by the Company of such fully executed Exercise Notice
accompanied by such aggregate Exercise Price.

               No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise complies with Applicable Laws. Assuming such
compliance, for income tax purposes the Exercised Shares shall be considered
transferred to the Optionee on the date the Option is exercised with respect to
such Exercised Shares.


        3.     Method of Payment. Payment of the aggregate Exercise Price shall
be by any of the following, or a combination thereof, at the election of the
Optionee:

<PAGE>   20

               (a) cash; or

               (b) check; or

               (c) consideration received by the Company under a cashless
exercise program implemented by the Company in connection with the Plan; or

               (d) surrender of other Shares which (i) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six (6) months on the date of surrender, AND (ii) have a Fair Market Value
on the date of surrender equal to the aggregate Exercise Price of the Exercised
Shares; or

               (e) with the Administrator's consent, delivery of Optionee's
promissory note (the "Note") in the form attached hereto as Exhibit C, in the
amount of the aggregate Exercise Price of the Exercised Shares together with the
execution and delivery by the Optionee of the Security Agreement attached hereto
as Exhibit B. The Note shall bear interest at the "applicable federal rate"
prescribed under the Code and its regulations at time of purchase, and shall be
secured by a pledge of the Shares purchased by the Note pursuant to the Security
Agreement.

        4.      Non-Transferability of Option. This Option may not be
transferred in any manner otherwise than by will or by the laws of descent or
distribution and may be exercised during the lifetime of Optionee only by the
Optionee. The terms of the Plan and this Option Agreement shall be binding upon
the executors, administrators, heirs, successors and assigns of the Optionee.

        5.     Term of Option. This Option may be exercised only within the
term set out in the Notice of Grant, and may be exercised during such term only
in accordance with the Plan and the terms of this Option Agreement.

        6.     Termination Period. This Option may be exercised for three months
after Optionee ceases to be a Service Provider. Upon the death or Disability of
the Optionee, this Option may be exercised for six (6) months after Optionee
ceases to be a Service Provider. In no event shall this Option be exercised
later than the Term/Expiration Date as provided above.

        7.     Tax Consequences. Some of the federal tax consequences relating
to this Option, as of the date of this Option, are set forth below. THIS SUMMARY
IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO
CHANGE. THE OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION
OR DISPOSING OF THE SHARES.

               (a) Exercising the Option.

                    (i) Nonstatutory Stock Option. The Optionee may incur
regular federal income tax liability upon exercise of a NSO. The Optionee will
be treated as having received compensation income (taxable at ordinary income
tax rates) equal to the excess, if any, of the Fair Market Value of the
Exercised Shares on the date of exercise over their aggregate Exercise Price. If
the Optionee is an Employee or a former Employee, the Company will be required
to withhold from


                                      -2-
<PAGE>   21

his or her compensation or collect from Optionee and pay to the applicable
taxing authorities an amount in cash equal to a percentage of this compensation
income at the time of exercise, and may refuse to honor the exercise and refuse
to deliver Shares if such withholding amounts are not delivered at the time of
exercise.

                    (ii) Incentive Stock Option. If this Option qualifies as an
ISO, the Optionee will have no regular federal income tax liability upon its
exercise, although the excess, if any, of the Fair Market Value of the Exercised
Shares on the date of exercise over their aggregate Exercise Price will be
treated as an adjustment to alternative minimum taxable income for federal tax
purposes and may subject the Optionee to alternative minimum tax in the year of
exercise. In the event that the Optionee ceases to be an Employee but remains a
Service Provider, any Incentive Stock Option of the Optionee that remains
unexercised shall cease to qualify as an Incentive Stock Option and will be
treated for tax purposes as a Nonstatutory Stock Option on the date three (3)
months and one (1) day following such change of status.

               (b) Disposition of Shares.

                    (i)   NSO. If the Optionee holds NSO Shares for at least one
year, any gain realized on disposition of the Shares will be treated as
long-term capital gain for federal income tax purposes.

                    (ii)  ISO. If the Optionee holds ISO Shares for at least one
year after exercise and two years after the grant date, any gain realized on
disposition of the Shares will be treated as long-term capital gain for federal
income tax purposes. If the Optionee disposes of ISO Shares within one year
after exercise or two years after the grant date, any gain realized on such
disposition will be treated as compensation income (taxable at ordinary income
rates) to the extent of the excess, if any, of the lesser of (A) the difference
between the Fair Market Value of the Shares acquired on the date of exercise and
the aggregate Exercise Price, or (B) the difference between the sale price of
such Shares and the aggregate Exercise Price. Any additional gain will be taxed
as capital gain, short-term or long-term depending on the period that the ISO
Shares were held.

               (c) Notice of Disqualifying Disposition of ISO Shares. If the
Optionee sells or otherwise disposes of any of the Shares acquired pursuant to
an ISO on or before the later of (i) two years after the grant date, or (ii) one
year after the exercise date, the Optionee shall immediately notify the Company
in writing of such disposition. The Optionee agrees that he or she may be
subject to income tax withholding by the Company on the compensation income
recognized from such early disposition of ISO Shares by payment in cash or out
of the current earnings paid to the Optionee.

        8.     Vesting Acceleration Upon Certain Terminations of Employment or
Consulting Relationship Following a Change of Control.


               (a) Vesting Acceleration for Optionees With One Year or More of
Service. If Optionee has served as an Employee of the Company for one (1) year
or more as of the date of a "Change of Control" and following such "Change of
Control" Optionee's Continuous Status as an Employee terminates as a result of
"Involuntary Termination" other than for "Cause" at any time


                                      -3-
<PAGE>   22

within twenty-four (24) months following such "Change of Control", then one
hundred percent (100%) of this Option shall automatically be accelerated in full
so as to become completely vested and fully exercisable (all quoted terms as
defined below).

               (b) Change of Control. "Change of Control" means the occurrence
of any of the following events:

                    (i)   Any "person" (as such term is used in Sections 13(d)
and 14(d) of the Securities Exchange Act of 1934, as amended) is or becomes the
"beneficial owner" (as defined in Rule 13d-3 under said Act), directly or
indirectly, of securities of the Company representing 50% or more of the total
voting power represented by the Company's then outstanding voting securities; or

                    (ii)  A change in the composition of the Board occurring
within a two-year period, as a result of which fewer than a majority of the
directors are Incumbent Directors. "Incumbent Directors" shall mean directors
who either (A) are directors of the Company as of the date hereof, or (B) are
elected, or nominated for election, to the Board with the affirmative votes of
at least a majority of the Incumbent Directors at the time of such election or
nomination (but shall not include an individual whose election or nomination is
in connection with an actual or threatened proxy contest relating to the
election of directors to the Company); or 

                    (iii) The stockholders of the Company approve a merger or
consolidation of the Company with any other corporation, other than a merger or
consolidation which would result in the voting securities of the Company
outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into voting securities of the
surviving entity) at least fifty percent (50%) of the total voting power
represented by the voting securities of the total voting power represented by
the voting securities of the Company of such surviving entity outstanding
immediately after such merger or consolidation, or the stockholders of the
Company approve a plan of complete liquidation of the Company or an agreement
for the sale or disposition by the Company of all substantially all the
Company's assets.

               (c) Involuntary Termination. "Involuntary Termination" shall mean
(i) the elimination of Optionee's job position or a material reduction of the
Optionee's job position or a material reduction of the Optionee's duties,
authority or responsibilities, relative to the Optionee's job position or
duties, authority or responsibilities as in effect immediately prior to such
reduction; (ii) a reduction by the Company in the base salary of the Optionee as
in effect immediately prior to such reduction; (iii) a material reduction by the
Company in the kind of level of employee benefits, including bonuses, to which
the Optionee was entitled immediately prior to such reduction with the result
that the Optionee's overall benefits package is materially reduced; or (iv) the
relocation of the Optionee to a facility or a location more than (30) miles from
the Optionee's then present location; or (v) any other involuntary termination
of the Optionee's employment without Cause except in the event of Disability.

               (d) Cause. "Cause" shall mean (i) any act of personal dishonesty,
fraud or misrepresentation taken by the Optionee in connection with his
responsibilities as an employee and intended to result in substantial gain or
personal enrichment of the Optionee at the expense of Company, (ii) the
Optionee's conviction of a felony, (iii) improper disclosure of the Company's


                                      -4-
<PAGE>   23

confidential or proprietary information by the Optionee; or (iv) the Optionee's
continued failure to substantially perform his principal duties in a reasonable
period of time after receipt of written notice from the Company.

               (e) Voluntary Resignation; Termination For Cause;
Non-Termination. If, following a Change of Control, the Optionee's Continuous
Status as an Employee terminates by reason of the Optionee's voluntary
resignation (and is not an Involuntary Termination), or if the Optionee's
Continuous Status as an Employee does not terminate, then the Optionee shall not
be entitled to receive accelerated Option vesting under Section 7(a) hereof.

        9.     Entire Agreement; Governing Law. The Plan is incorporated herein
by reference. The Plan and this Option Agreement constitute the entire agreement
of the parties with respect to the subject matter hereof and supersede in their
entirety all prior undertakings and agreements of the Company and Optionee with
respect to the subject matter hereof, and may not be modified adversely to the
Optionee's interest except by means of a writing signed by the Company and
Optionee. This agreement is governed by the internal substantive laws, but not
the choice of law rules, of Delaware.

          10.  NO GUARANTEE OF CONTINUED SERVICE. OPTIONEE ACKNOWLEDGES AND
AGREES THAT THE VESTING OF SHARES PURSUANT TO THE VESTING SCHEDULE HEREOF IS
EARNED ONLY BY CONTINUING AS A SERVICE PROVIDER AT THE WILL OF THE COMPANY (AND
NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED AN OPTION OR PURCHASING SHARES
HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE
TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO
NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS A
SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND SHALL
NOT INTERFERE WITH OPTIONEE'S RIGHT OR THE COMPANY'S RIGHT TO TERMINATE
OPTIONEE'S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME, WITH OR WITHOUT
CAUSE.


                                      -5-
<PAGE>   24

        By your signature and the signature of the Company's representative
below, you and the Company agree that this Option is granted under and governed
by the terms and conditions of the Plan and this Option Agreement. Optionee has
reviewed the Plan and this Option Agreement in their entirety, has had an
opportunity to obtain the advice of counsel prior to executing this Option
Agreement and fully understands all provisions of the Plan and Option Agreement.
Optionee hereby agrees to accept as binding, conclusive and final all decisions
or interpretations of the Administrator upon any questions relating to the Plan
and Option Agreement. Optionee further agrees to notify the Company upon any
change in the residence address indicated below.

OPTIONEE:                                          CELL GENESYS, INC.



- --------------------------                        ----------------------------- 
Signature                                          By

- ---------------------------                       ----------------------------- 
Print Name                                         Title

- ---------------------------
Residence Address


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


                                CONSENT OF SPOUSE


        The undersigned spouse of Optionee has read and hereby approves the
terms and conditions of the Plan and this Option Agreement. In consideration of
the Company's granting his or her spouse the right to purchase Shares as set
forth in the Plan and this Option Agreement, the undersigned hereby agrees to be
irrevocably bound by the terms and conditions of the Plan and this Option
Agreement and further agrees that any community property interest shall be
similarly bound. The undersigned hereby appoints the undersigned's spouse as
attorney-in-fact for the undersigned with respect to any amendment or exercise
of rights under the Plan or this Option Agreement.


                                                  ----------------------------- 
                                                   Spouse of Optionee


                                      -6-

<PAGE>   1
                                                                     EXHIBIT 4.1

                               CELL GENESYS, INC.
                            1998 INCENTIVE STOCK PLAN

     1.   Purposes of the Plan. The purposes of this Stock Plan are:

          o   to attract and retain the best available personnel for positions
              of substantial responsibility,

          o   to provide additional incentive to Employee, Directors and
              Consultants, and

          o   to promote the success of the Company's business.

        Options granted under the Plan may be Incentive Stock Options or
Nonstatutory Stock Options, as determined by the Administrator at the time of
grant. Stock Purchase Rights may also be granted under the Plan.

     2. Definitions. As used herein, the following definitions shall apply:

          (a) "Administer" means the Board or any of its Committees as shall be
administering the Plan, in accordance with Section 4 of the Plan.

          (b) "Applicable Laws" means the requirements relating to the
administration of stock plans under U.S. state corporate laws, U.S. federal and
state securities laws, the Code, any stock exchange or quotation system on which
the Common Stock is listed or quoted and the applicable laws of any foreign
country or jurisdiction where Options or Stock Purchase Rights are, or will be,
granted under the Plan.

          (c) "Board" means the Board of Directors of the Company.

          (d) "Code" means the Internal Revenue Code of 1986, as amended.

          (e) "Committee" means a committee of Directors appointed by the Board
in accordance with Section 4 of the Plan.

          (f) "Common Stock" means the common stock of the Company. (g)
"Company" means Cell Genesys, Inc., a Delaware corporation.

          (h) "Consultant" means any person, including an advisor, engaged by
the Company or a Parent or Subsidiary to render services to such entity.

          (i) "Director" means a member of the Board.

          (j) "Disability" means total and permanent disability as defined in
Section 22(e)(3) of the Code.


                                      -1-

<PAGE>   1
                                                               EXHIBIT 5.1

                        WILSON SONSINI GOODRICH & ROSATI
                               650 Page Mill Road
                        Palo Alto, California 94304-1050
              Telephone: (650) 493-9300 Facsimile: (650) 493-6811

                                 July 22, 1998


Cell Genesys, Inc.
342 Lakeside Drive
Foster City, California  94404

        RE:    REGISTRATION STATEMENT ON FORM S-8

Gentlemen:

        We have examined the Registration Statement on Form S-8 to be filed by
you with the Securities and Exchange Commission on July 22, 1998 (the
"Registration Statement"), in connection with the registration under the
Securities Act of 1933, as amended, of 1,760,000 shares of your Common Stock
reserved for issuance under the 1998 Incentive Stock Plan. As your legal
counsel, we have examined the proceedings taken and are familiar with the
proceedings proposed to be taken by you in connection with the sale and issuance
of such Common Stock under the Plan.

        It is our opinion that, when issued and sold in the manner referred to
in the Plan and pursuant to the agreements which accompany the Plan, the Common
Stock issued and sold thereby will be legally and validly issued, fully paid and
non-assessable.

        We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to the use of our name wherever appearing in the
Registration Statement, including any Prospectus constituting a part thereof,
and any amendments thereto.

                                          Very truly yours,

                                          WILSON SONSINI GOODRICH & ROSATI
                                          Professional Corporation

                                          /s/ WILSON SONSINI GOODRICH & ROSATI


<PAGE>   1

                                                                    EXHIBIT 23.2


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

        We consent to the incorporation by reference in the Registration
Statement (Form S-8) pertaining to the 1998 Incentive Stock Plan of Cell
Genesys, Inc. of our report dated January 28, 1998, with respect to the
consolidated financial statements of Cell Genesys, Inc. included in its Annual
Report on Form 10-K for the year ended December 31, 1997, filed with the
Securities and Exchange Commission.

ERNST & YOUNG LLP
Palo Alto, California

July 22, 1998


                                      


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