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                                                                    EXHIBIT 10.5

                              GENITOPE CORPORATION

                 2003 NON-EMPLOYEE DIRECTORS' STOCK OPTION PLAN

                             ADOPTED AUGUST 7, 2003
                   APPROVED BY STOCKHOLDERS AUGUST 29, 2003

1.       PURPOSES.

         (a)      ELIGIBLE OPTION RECIPIENTS. The persons eligible to receive
Options are the Non-Employee Directors of the Company.

         (b)      AVAILABLE OPTIONS. The purpose of the Plan is to provide a
means by which Non-Employee Directors may be given an opportunity to benefit
from increases in value of the Common Stock through the granting of Nonstatutory
Stock Options.

         (c)      GENERAL PURPOSE. The Company, by means of the Plan, seeks to
retain the services of its Non-Employee Directors, to secure and retain the
services of new Non-Employee Directors and to provide incentives for such
persons to exert maximum efforts for the success of the Company and its
Affiliates.

2.       DEFINITIONS.

         (a)      "ACCOUNTANT" means the independent public accountants of the
Company.

         (b)      "AFFILIATE" means any parent corporation or subsidiary
corporation of the Company, whether now or hereafter existing, as those terms
are defined in Sections 424(e) and (f), respectively, of the Code.

         (c)      "ANNUAL GRANT" means an Option granted annually to all
Non-Employee Directors who meet the specified criteria pursuant to Section 6(b).

         (d)      "ANNUAL MEETING" means the annual meeting of the stockholders
of the Company.

         (e)      "BOARD" means the Board of Directors of the Company.

         (f)      "CAPITALIZATION ADJUSTMENT" has the meaning ascribed to that
term in Section 11(a).

         (g)      "CHANGE IN CONTROL" means the occurrence, in a single
transaction or in a series of related transactions, of any one or more of the
following events:

                  (i)      any Exchange Act Person becomes the Owner, directly
or indirectly, of securities of the Company representing more than fifty percent
(50%) of the combined voting power of the Company's then outstanding securities
other than by virtue of a merger, consolidation or similar transaction.
Notwithstanding the foregoing, a Change in Control shall

                                       1.

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not be deemed to occur solely because the level of Ownership held by any
Exchange Act Person (the "Subject Person") exceeds the designated percentage
threshold of the outstanding voting securities as a result of a repurchase or
other acquisition of voting securities by the Company reducing the number of
shares outstanding, provided that if a Change in Control would occur (but for
the operation of this sentence) as a result of the acquisition of voting
securities by the Company, and after such share acquisition, the Subject Person
becomes the Owner of any additional voting securities that, assuming the
repurchase or other acquisition had not occurred, increases the percentage of
the then outstanding voting securities Owned by the Subject Person over the
designated percentage threshold, then a Change in Control shall be deemed to
occur;

                  (ii)     there is consummated a merger, consolidation or
similar transaction involving (directly or indirectly) the Company and,
immediately after the consummation of such merger, consolidation or similar
transaction, the stockholders of the Company immediately prior thereto do not
Own, directly or indirectly, outstanding voting securities representing more
than fifty percent (50%) of the combined outstanding voting power of the
surviving Entity in such merger, consolidation or similar transaction or more
than fifty percent (50%) of the combined outstanding voting power of the parent
of the surviving Entity in such merger, consolidation or similar transaction;

                  (iii)    the stockholders of the Company approve or the Board
approves a plan of complete dissolution or liquidation of the Company, or a
complete dissolution or liquidation of the Company shall otherwise occur;

                  (iv)     there is consummated a sale, lease, license or other
disposition of all or substantially all of the consolidated assets of the
Company and its Subsidiaries, other than a sale, lease, license or other
disposition of all or substantially all of the consolidated assets of the
Company and its Subsidiaries to an Entity, more than fifty percent (50%) of the
combined voting power of the voting securities of which are Owned by
stockholders of the Company in substantially the same proportions as their
Ownership of the Company immediately prior to such sale, lease, license or other
disposition; or

                  (v)      individuals who, on the date this Plan is adopted by
the Board, are members of the Board (the "Incumbent Board") cease for any reason
to constitute at least a majority of the members of the Board; (provided,
however, that if the appointment or election (or nomination for election) of any
new Board member was approved or recommended by a majority vote of the members
of the Incumbent Board then still in office, such new member shall, for purposes
of this Plan, be considered as a member of the Incumbent Board).

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

         (i)      "COMMITTEE GRANT" means an Option granted annually to all
Non-Employee Directors who meet the specified criteria pursuant to Section 6(c).

         (j)      "COMMON STOCK" means the common stock of the Company.

         (k)      "COMPANY" means Genitope Corporation, a Delaware corporation.

                                       2.

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         (l)      "CONSULTANT" means any person, including an advisor, (i)
engaged by the Company or an Affiliate to render consulting or advisory services
and who is compensated for such services or (ii) serving as a member of the
Board of Directors of an Affiliate. However, the term "Consultant" shall not
include either Directors of the Company who are not compensated by the Company
for their services as Directors or Directors of the Company who are merely paid
a director's fee by the Company for their services as Directors.

         (m)      "CONTINUOUS SERVICE" means that the Optionholder's service
with the Company or an Affiliate, whether as an Employee, Director or
Consultant, is not interrupted or terminated. The Optionholder's Continuous
Service shall not be deemed to have terminated merely because of a change in the
capacity in which the Optionholder renders service to the Company or an
Affiliate as an Employee, Consultant or Director or a change in the entity for
which the Optionholder renders such service, provided that there is no
interruption or termination of the Optionholder's Continuous Service. For
example, a change in status from a Non-Employee Director of the Company to a
Consultant of an Affiliate or an Employee of the Company will not constitute an
interruption of Continuous Service. The Board or the chief executive officer of
the Company, in that party's sole discretion, may determine whether Continuous
Service shall be considered interrupted in the case of any leave of absence
approved by that party, including sick leave, military leave or any other
personal leave.

         (n)      "CORPORATE TRANSACTION" means the occurrence, in a single
transaction or in a series of related transactions, of any one or more of the
following events:

                  (i)      a sale or other disposition of all or substantially
all, as determined by the Board in its discretion, of the consolidated assets of
the Company and its Subsidiaries;

                  (ii)     a sale or other disposition of at least ninety
percent (90%) of the outstanding securities of the Company;

                  (iii)    a merger, consolidation or similar transaction
following which the Company is not the surviving corporation; or

                  (iv)     a merger, consolidation or similar transaction
following which the Company is the surviving corporation but the shares of
Common Stock outstanding immediately preceding the merger, consolidation or
similar transaction are converted or exchanged by virtue of the merger,
consolidation or similar transaction into other property, whether in the form of
securities, cash or otherwise.

         (o)      "DIRECTOR" means a member of the Board of Directors of the
Company.

         (p)      "DISABILITY" means the inability of a person, in the opinion
of a qualified physician acceptable to the Company, to perform the major duties
of that person's position with the Company or an Affiliate of the Company
because of the sickness or injury of the person.

         (q)      "EMPLOYEE" means any person employed by the Company or an
Affiliate. Service as a Director or payment of a director's fee by the Company
or an Affiliate shall not be sufficient to constitute "employment" by the
Company or an Affiliate.

                                       3.

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         (r)      "ENTITY" means a corporation, partnership or other entity.

         (s)      "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

         (t)      "EXCHANGE ACT PERSON" means any natural person, Entity or
"group" (within the meaning of Section 13(d) or 14(d) of the Exchange Act),
except that "Exchange Act Person" shall not include (A) the Company or any
Subsidiary of the Company, (B) any employee benefit plan of the Company or any
Subsidiary of the Company or any trustee or other fiduciary holding securities
under an employee benefit plan of the Company or any Subsidiary of the Company,
(C) an underwriter temporarily holding securities pursuant to an offering of
such securities, or (D) an Entity Owned, directly or indirectly, by the
stockholders of the Company in substantially the same proportions as their
Ownership of stock of the Company.

         (u)      "FAIR MARKET VALUE" means, as of any date, the value of the
Common Stock determined as follows:

                  (i)      If the Common Stock is listed on any established
stock exchange or traded on the Nasdaq National Market or the Nasdaq SmallCap
Market, the Fair Market Value of a share of Common Stock shall be the closing
sales price for such stock (or the closing bid, if no sales were reported) as
quoted on such exchange or market (or the exchange or market with the greatest
volume of trading in the Common Stock) on the last market trading day prior to
the day of determination, as reported in The Wall Street Journal or such other
source as the Board deems reliable.

                  (ii)     In the absence of such markets for the Common Stock,
the Fair Market Value shall be determined in good faith by the Board.

         (v)      "INITIAL GRANT" means an Option granted to a Non-Employee
Director who meets the specified criteria pursuant to Section 6(a).

         (w)      "IPO DATE" means the effective date of the initial public
offering of the Common Stock.

         (x)      "NON-EMPLOYEE DIRECTOR" means a Director who is not an
Employee.

         (y)      "NONSTATUTORY STOCK OPTION" means an Option not intended to
qualify as an incentive stock option within the meaning of Section 422 of the
Code and the regulations promulgated thereunder.

         (z)      "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.

         (aa)     "OPTION" means a Nonstatutory Stock Option granted pursuant to
the Plan.

         (bb)     "OPTION AGREEMENT" means a written agreement between the
Company and an Optionholder evidencing the terms and conditions of an individual
Option grant. Each Option Agreement shall be subject to the terms and conditions
of the Plan.

                                       4.

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         (cc)     "OPTIONHOLDER" means a person to whom an Option is granted
pursuant to the Plan or, if applicable, such other person who holds an
outstanding Option.

         (dd)     "OWN," "OWNED," "OWNER," "OWNERSHIP" A person or Entity shall
be deemed to "Own," to have "Owned," to be the "Owner" of, or to have acquired
"Ownership" of securities if such person or Entity, directly or indirectly,
through any contract, arrangement, understanding, relationship or otherwise, has
or shares voting power, which includes the power to vote or to direct the
voting, with respect to such securities.

         (ee)     "PLAN" means this Genitope Corporation 2003 Non-Employee
Directors' Stock Option Plan.

         (ff)     "RULE 16b-3" means Rule 16b-3 promulgated under the Exchange
Act or any successor to Rule 16b-3, as in effect from time to time.

         (gg)     "SECURITIES ACT" means the Securities Act of 1933, as amended.

         (hh)     "SUBSIDIARY" means, with respect to the Company, (i) any
corporation of which more than fifty percent (50%) of the outstanding capital
stock having ordinary voting power to elect a majority of the board of directors
of such corporation (irrespective of whether, at the time, stock of any other
class or classes of such corporation shall have or might have voting power by
reason of the happening of any contingency) is at the time, directly or
indirectly, Owned by the Company, and (ii) any partnership in which the Company
has a direct or indirect interest (whether in the form of voting or
participation in profits or capital contribution) of more than fifty percent
(50%).

3.       ADMINISTRATION.

         (a)      ADMINISTRATION BY BOARD. The Board shall administer the Plan.
The Board may not delegate administration of the Plan to a committee.

         (b)      POWERS OF BOARD. The Board shall have the power, subject to,
and within the limitations of, the express provisions of the Plan:

                  (i)      To determine the provisions of each Option to the
extent not specified in the Plan.

                  (ii)     To construe and interpret the Plan and Options
granted under it, and to establish, amend and revoke rules and regulations for
its administration. The Board, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan or in any Option Agreement, in a
manner and to the extent it shall deem necessary or expedient to make the Plan
fully effective.

                  (iii)    To amend the Plan or an Option as provided in Section
12.

                  (iv)     Generally, to exercise such powers and to perform
such acts as the Board deems necessary or expedient to promote the best
interests of the Company and that are not in conflict with the provisions of the
Plan.

                                       5.

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         (c)      EFFECT OF BOARD'S DECISION. All determinations,
interpretations and constructions made by the Board in good faith shall not be
subject to review by any person and shall be final, binding and conclusive on
all persons.

4.       SHARES SUBJECT TO THE PLAN.

         (a)      SHARE RESERVE. Subject to the provisions of Section 11
relating to adjustments upon changes in the Common Stock, the Common Stock that
may be issued pursuant to Options shall not exceed in the aggregate one hundred
thirty-three thousand (133,000) shares of Common Stock, plus an annual increase
for ten years beginning on January 1, 2004 and ending on (and including) January
1, 2013 equal to the number of shares subject to Options granted during the
prior calendar year. Notwithstanding the foregoing, the Board may act, prior to
the first day of any fiscal year of the Company, to increase the share reserve
by such number of shares of Common Stock as the Board shall determine, which
number shall be less than the amount described in the foregoing sentence.

         (b)      REVERSION OF SHARES TO THE SHARE RESERVE. If any Option shall
for any reason expire or otherwise terminate, in whole or in part, without
having been exercised in full, the shares of Common Stock not acquired under
such Option shall revert to and again become available for issuance under the
Plan.

         (c)      SOURCE OF SHARES. The shares of Common Stock subject to the
Plan may be unissued shares or reacquired shares, bought on the market or
otherwise.

5.       ELIGIBILITY.

         The Options, as set forth in Section 6, automatically shall be granted
under the Plan to all Non-Employee Directors who meet the criteria specified in
Section 6.

6.       NON-DISCRETIONARY GRANTS.

         (a)      INITIAL GRANTS. Without any further action of the Board, each
person who is serving as a Non-Employee Director on the IPO Date automatically
shall, on the IPO Date, be granted an Initial Grant to purchase twenty-five
thousand (25,000) shares of Common Stock on the terms and conditions set forth
herein. Additionally, without any further action of the Board, each person who
after the IPO Date is elected or appointed for the first time to be a
Non-Employee Director automatically shall, upon the date of his or her initial
election or appointment to be a Non-Employee Director, be granted an Initial
Grant to purchase twenty-five thousand (25,000) shares of Common Stock on the
terms and conditions set forth herein.

         (b)      ANNUAL GRANTS. Without any further action of the Board, on the
day following each Annual Meeting, commencing with the Annual Meeting in 2004,
each person who is then a Non-Employee Director automatically shall be granted
an Annual Grant to purchase ten thousand (10,000) shares of Common Stock on the
terms and conditions set forth herein; provided, however, that if the person has
not been serving as a Non-Employee Director for the entire period since the
preceding Annual Meeting, then the number of shares subject to such

                                       6.

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Annual Grant shall be reduced pro rata for each full quarter prior to the date
of grant during which such person did not serve as a Non- Employee Director.

         (c)      COMMITTEE GRANTS. Without any further action of the Board, on
the day following each Annual Meeting, commencing with the Annual Meeting in
2004, each Non-Employee Director automatically shall be granted a Committee
Grant to purchase one thousand (1,000) shares of Common Stock for each committee
of the Board of which such Non-Employee Director is a member as of such date on
the terms and conditions set forth herein.

7.       OPTION PROVISIONS.

         Each Option shall be in such form and shall contain such terms and
conditions as required by the Plan. Each Option shall contain such additional
terms and conditions, not inconsistent with the Plan, as the Board shall deem
appropriate. Each Option shall include (through incorporation of provisions
hereof by reference in the Option or otherwise) the substance of each of the
following provisions:

         (a)      TERM. No Option shall be exercisable after the expiration of
ten (10) years from the date it was granted.

         (b)      EXERCISE PRICE. The exercise price of each Option shall be one
hundred percent (100%) of the Fair Market Value of the stock subject to the
Option on the date the Option is granted.

         (c)      CONSIDERATION. The purchase price of stock acquired pursuant
to an Option may be paid, to the extent permitted by applicable law, in any
combination of (i) cash or check, (ii) delivery to the Company of other Common
Stock or (iii) pursuant to a program developed under Regulation T as promulgated
by the Federal Reserve Board that, prior to the issuance of Common Stock,
results in either the receipt of cash (or check) by the Company or the receipt
of irrevocable instructions to pay the aggregate exercise price to the Company
from the sales proceeds. The purchase price of Common Stock acquired pursuant to
an Option that is paid by delivery to the Company of other Common Stock
acquired, directly or indirectly from the Company, shall be paid only by shares
of the Common Stock of the Company that have been held for more than six (6)
months (or such longer or shorter period of time required to avoid a charge to
earnings for financial accounting purposes).

         (d)      TRANSFERABILITY. An Option is transferable by will or by the
laws of descent and distribution. An Option also may be transferable upon
written consent of the Company if, at the time of transfer, a Form S-8
registration statement under the Securities Act is available for the exercise of
the Option and the subsequent resale of the underlying securities. In addition,
an Optionholder may, by delivering written notice to the Company, in a form
provided by or otherwise satisfactory to the Company, designate a third party
who, in the event of the death of the Optionholder, shall thereafter be entitled
to exercise the Option.

         (e)      VESTING. Options shall vest as follows:

                                       7.

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                  (i)      Initial Grants: 1/36th of the shares shall vest
monthly from the date of grant for three (3) years.

                  (ii)     Annual Grants: 1/36th of the shares shall vest
monthly from the date of grant for three (3) years.

                  (iii)    Committee Grants: 1/12th of the shares shall vest
monthly from the date of grant for one (1) year so long as the Non-Employee
Director remains a member of the Committee for which he or she was granted such
Committee Grant.

         (f)      EARLY EXERCISE. The Option may, but need not, include a
provision whereby the Optionholder may elect at any time before the
Optionholder's Continuous Service terminates to exercise the Option as to any
part or all of the shares of Common Stock subject to the Option prior to the
full vesting of the Option. Any unvested shared of Common Stock so purchased may
be subject to a repurchase option in favor of the Company or to any other
restriction the Board determines to be appropriate. The Company will not
exercise its repurchase option until at least six (6) months (or such longer or
shorter period of time required to avoid a charge to earnings for financial
accounting purposes) have elapsed following exercise of the Option unless the
Board otherwise specifically provides in the Option.

         (g)      TERMINATION OF CONTINUOUS SERVICE. In the event an
Optionholder's Continuous Service terminates (other than upon the Optionholder's
death or Disability), the Optionholder may exercise his or her Option (to the
extent that the Optionholder was entitled to exercise it as of the date of
termination) but only within such period of time ending on the earlier of (i)
the date three (3) months following the termination of the Optionholder's
Continuous Service, or (ii) the expiration of the term of the Option as set
forth in the Option Agreement. If, after termination, the Optionholder does not
exercise his or her Option within the time specified in the Option Agreement,
the Option shall terminate.

         (h)      EXTENSION OF TERMINATION DATE. If the exercise of the Option
following the termination of the Optionholder's Continuous Service (other than
upon the Optionholder's death or Disability) would be prohibited at any time
solely because the issuance of shares would violate the registration
requirements under the Securities Act, then the Option shall terminate on the
earlier of (i) the expiration of the term of the Option as set forth in the
Option Agreement or (ii) the expiration of a period of three (3) months after
the termination of the Optionholder's Continuous Service during which the
exercise of the Option would not be in violation of such registration
requirements.

         (i)      DISABILITY OF OPTIONHOLDER. In the event an Optionholder's
Continuous Service terminates as a result of the Optionholder's Disability, the
Optionholder may exercise his or her Option (to the extent that the Optionholder
was entitled to exercise it as of the date of termination), but only within such
period of time ending on the earlier of (i) the date twelve (12) months
following such termination or (ii) the expiration of the term of the Option as
set forth in the Option Agreement. If, after termination, the Optionholder does
not exercise his or her Option within the time specified herein, the Option
shall terminate.

                                       8.

<PAGE>

         (j)      DEATH OF OPTIONHOLDER. In the event (i) an Optionholder's
Continuous Service terminates as a result of the Optionholder's death or (ii)
the Optionholder dies within the three-month period after the termination of the
Optionholder's Continuous Service for a reason other than death, then the Option
may be exercised (to the extent the Optionholder was entitled to exercise the
Option as of the date of death) by the Optionholder's estate, by a person who
acquired the right to exercise the Option by bequest or inheritance or by a
person designated to exercise the Option upon the Optionholder's death, but only
within the period ending on the earlier of (1) the date eighteen (18) months
following the date of death or (2) the expiration of the term of such Option as
set forth in the Option Agreement. If, after death, the Option is not exercised
within the time specified herein, the Option shall terminate.

8.       SECURITIES LAW COMPLIANCE.

         The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
grant Options and to issue and sell shares of Common Stock upon exercise of the
Options; provided, however, that this undertaking shall not require the Company
to register under the Securities Act the Plan, any Option or any stock issued or
issuable pursuant to any such Option. If, after reasonable efforts, the Company
is unable to obtain from any such regulatory commission or agency the authority
which counsel for the Company deems necessary for the lawful issuance and sale
of stock under the Plan, the Company shall be relieved from any liability for
failure to issue and sell stock upon exercise of such Options unless and until
such authority is obtained.

9.       USE OF PROCEEDS FROM STOCK.

         Proceeds from the sale of stock pursuant to Options shall constitute
general funds of the Company.

10.      MISCELLANEOUS.

         (a)      STOCKHOLDER RIGHTS. No Optionholder shall be deemed to be the
holder of, or to have any of the rights of a holder with respect to, any shares
subject to such Option unless and until such Optionholder has satisfied all
requirements for exercise of the Option pursuant to its terms.

         (b)      NO SERVICE RIGHTS. Nothing in the Plan or any instrument
executed or Option granted pursuant thereto shall confer upon any Optionholder
any right to continue to serve the Company as a Non-Employee Director or shall
affect the right of the Company or an Affiliate to terminate (i) the employment
of an Employee with or without notice and with or without cause, (ii) the
service of a Consultant pursuant to the terms of such Consultant's agreement
with the Company or an Affiliate or (iii) the service of a Director pursuant to
the Bylaws of the Company or an Affiliate, and any applicable provisions of the
corporate law of the state in which the Company or the Affiliate is
incorporated, as the case may be.

         (c)      INVESTMENT ASSURANCES. The Company may require an
Optionholder, as a condition of exercising or acquiring stock under any Option,
(i) to give written assurances satisfactory to the Company as to the
Optionholder's knowledge and experience in financial and

                                       9.

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business matters and/or to employ a purchaser representative reasonably
satisfactory to the Company who is knowledgeable and experienced in financial
and business matters and that he or she is capable of evaluating, alone or
together with the purchaser representative, the merits and risks of exercising
the Option; and (ii) to give written assurances satisfactory to the Company
stating that the Optionholder is acquiring the stock subject to the Option for
the Optionholder's own account and not with any present intention of selling or
otherwise distributing the stock. The foregoing requirements, and any assurances
given pursuant to such requirements, shall be inoperative if (1) the issuance of
the shares upon the exercise or acquisition of stock under the Option has been
registered under a then currently effective registration statement under the
Securities Act or (2) as to any particular requirement, a determination is made
by counsel for the Company that such requirement need not be met in the
circumstances under the then applicable securities laws. The Company may, upon
advice of counsel to the Company, place legends on stock certificates issued
under the Plan as such counsel deems necessary or appropriate in order to comply
with applicable securities laws, including, but not limited to, legends
restricting the transfer of the stock.

         (d)      WITHHOLDING OBLIGATIONS. The Optionholder may satisfy any
federal, state or local tax withholding obligation relating to the exercise or
acquisition of stock under an Option by any of the following means (in addition
to the Company's right to withhold from any compensation paid to the
Optionholder by the Company) or by a combination of such means: (i) tendering a
cash payment; (ii) authorizing the Company to withhold shares from the shares of
the Common Stock otherwise issuable to the Optionholder as a result of the
exercise or acquisition of stock under the Option; provided, however, that no
shares of Common Stock are withheld with a value exceeding the minimum amount of
tax required to be withheld by law; or (iii) delivering to the Company owned and
unencumbered shares of the Common Stock.

11.      ADJUSTMENTS UPON CHANGES IN COMMON STOCK.

         (a)      CAPITALIZATION ADJUSTMENTS. If any change is made in, or other
events occur with respect to, the stock subject to the Plan, or subject to any
Option, without the receipt of consideration by the Company (through merger,
consolidation, reorganization, recapitalization, reincorporation, stock
dividend, dividend in property other than cash, stock split, liquidating
dividend, combination of shares, exchange of shares, change in corporate
structure or other transaction not involving the receipt of consideration by the
Company (each a "Capitalization Adjustment")), the Plan will be appropriately
adjusted in the class(es) and maximum number of securities subject both to the
Plan pursuant to Section 4 and to the nondiscretionary Options specified in
Section 6, and the outstanding Options will be appropriately adjusted in the
class(es) and number of securities and price per share of stock subject to such
outstanding Options. The Board shall make such adjustments, and its
determination shall be final, binding and conclusive. (The conversion of any
convertible securities of the Company shall not be treated as a transaction
"without receipt of consideration" by the Company.)

         (b)      DISSOLUTION OR LIQUIDATION. In the event of a dissolution or
liquidation of the Company, then all outstanding Options shall terminate
immediately prior to the completion of such dissolution or liquidation.

                                      10.

<PAGE>

         (c)      CORPORATE TRANSACTION. In the event of a Corporate
Transaction, any surviving corporation or acquiring corporation may assume any
or all Options outstanding under the Plan or may substitute similar stock
options for Options outstanding under the Plan (it being understood that similar
stock options include, but are not limited to, options to acquire the same
consideration paid to the stockholders or the Company, as the case may be,
pursuant to the Corporate Transaction). In the event that any surviving
corporation or acquiring corporation does not assume any or all such outstanding
Options or substitute similar stock options for such outstanding Options, then
with respect to Options that have been neither assumed nor substituted and that
are held by Optionholders whose Continuous Service has not terminated prior to
the effective time of the Corporate Transaction, the vesting of such Options
(and, if applicable, the time at which such Options may be exercised) shall
(contingent upon the effectiveness of the Corporate Transaction) be accelerated
in full to a date prior to the effective time of such Corporate Transaction as
the Board shall determine (or, if the Board shall not determine such a date, to
the date that is five (5) days prior to the effective time of the Corporate
Transaction), and the Options shall terminate if not exercised (if applicable)
at or prior to such effective time. With respect to any other Options
outstanding under the Plan that have been neither assumed nor substituted, the
vesting of such Options (and, if applicable, the time at which such Options may
be exercised) shall not be accelerated unless otherwise provided in Section
11(d) or in a written agreement between the Company or any Affiliate and the
holder of such Options, and such Options shall terminate if not exercised (if
applicable) prior to the effective time of the Corporate Transaction.

         (d)      CHANGE IN CONTROL. If a Change in Control occurs and an
Optionholder's Continuous Service with the Company has not terminated
immediately prior to the effective time of the Change in Control, then,
immediately prior to the effective time of such Change in Control (and
contingent upon the effectiveness of the Change in Control), the vesting and
exercisability of an Optionholder's Options shall be accelerated in full. In the
event that an Optionholder is required to resign his or her position as a
Non-Employee Director as a condition of a Change in Control, the outstanding
Options of such Optionholder shall become fully vested and exercisable
immediately prior to the effectiveness of such resignation (and contingent upon
the effectiveness of the Change in Control).

         (e)      PARACHUTE PAYMENTS. If the acceleration of the vesting and
exercisability of Options provided for in Section 11(c), together with payments
and other benefits of an Optionholder, (collectively, the "Payment") (i)
constitute a "parachute payment" within the meaning of Section 280G of the Code,
or any comparable successor provisions, and (ii) but for this Section 11(e)
would be subject to the excise tax imposed by Section 4999 of the Code, or any
comparable successor provisions (the "Excise Tax"), then such Payment shall be
either (1) provided to such Optionholder in full, or (2) provided to such
Optionholder as to such lesser extent that would result in no portion of such
Payment being subject to the Excise Tax, whichever of the foregoing amounts,
when taking into account applicable federal, state, local and foreign income and
employment taxes, the Excise Tax, and any other applicable taxes, results in the
receipt by such Optionholder, on an after-tax basis, of the greatest amount of
the Payment, notwithstanding that all or some portion of the Payment may be
subject to the Excise Tax.

                  Unless the Company and such Optionholder otherwise agree in
writing, any determination required under this Section 11(e) shall be made in
writing in good faith by the

                                      11.

<PAGE>

Accountant. If a reduction in the Payment is to be made as provided above,
reductions shall occur in the following order unless the Optionholder elects in
writing a different order (provided, however, that such election shall be
subject to Company approval if made on or after the date that triggers the
Payment or a portion thereof): reduction of cash payments; cancellation of
accelerated vesting of Options; reduction of employee benefits. If acceleration
of vesting of Options is to be reduced, such acceleration of vesting shall be
cancelled in the reverse order of date of grant of Options (i.e., earliest
granted Option cancelled last) unless the Optionholder elects in writing a
different order for cancellation.

                  For purposes of making the calculations required by this
Section 11(e), the Accountant may make reasonable assumptions and approximations
concerning applicable taxes and may rely on reasonable, good faith
interpretations concerning the application of the Code and other applicable
legal authority. The Company and the Optionholder shall furnish to the
Accountant such information and documents as the Accountant may reasonably
request in order to make such a determination. The Company shall bear all costs
the Accountant may reasonably incur in connection with any calculations
contemplated by this Section 11(e).

                  If, notwithstanding any reduction described above, the
Internal Revenue Service (the "IRS") determines that the Optionholder is liable
for the Excise Tax as a result of the Payment, then the Optionholder shall be
obligated to pay back to the Company, within thirty (30) days after a final IRS
determination or, in the event that the Optionholder challenges the final IRS
determination, a final judicial determination, a portion of the Payment equal to
the "Repayment Amount." The Repayment Amount with respect to the Payment shall
be the smallest such amount, if any, as shall be required to be paid to the
Company so that the Optionholder's net after-tax proceeds with respect to the
Payment (after taking into account the payment of the Excise Tax and all other
applicable taxes imposed on the Payment) shall be maximized. The Repayment
Amount with respect to the Payment shall be zero if a Repayment Amount of more
than zero would not result in the Optionholder's net after-tax proceeds with
respect to the Payment being maximized. If the Excise Tax is not eliminated
pursuant to this paragraph, the Optionholder shall pay the Excise Tax.

                  Notwithstanding any other provision of this Section 11(e), if
(i) there is a reduction in the Payment as described above, (ii) the IRS later
determines that the Optionholder is liable for the Excise Tax, the payment of
which would result in the maximization of the Optionholder's net after-tax
proceeds of the Payment (calculated as if the Payment had not previously been
reduced), and (iii) the Optionholder pays the Excise Tax, then the Company shall
pay or otherwise provide to the Optionholder that portion of the Payment that
was reduced pursuant to this Section 11(e) contemporaneously or as soon as
administratively possible after the Optionholder pays the Excise Tax so that the
Optionholder's net after-tax proceeds with respect to the Payment are maximized.

                  If the Optionholder either (i) brings any action to enforce
rights pursuant to this Section 11(e), or (ii) defends any legal challenge to
his or her rights under this Section 11(e), the Optionholder shall be entitled
to recover attorneys' fees and costs incurred in connection with such action,
regardless of the outcome of such action; provided, however, that if such action
is commenced by the Optionholder, the court finds that the action was brought in
good faith.

                                      12.

<PAGE>

12.      AMENDMENT OF THE PLAN AND OPTIONS.

         (a)      AMENDMENT OF PLAN. The Board, at any time and from time to
time, may amend the Plan. However, except as provided in Section 11 relating to
adjustments upon changes in Common Stock, no amendment shall be effective unless
approved by the stockholders of the Company to the extent stockholder approval
is necessary to satisfy the requirements of applicable laws.

         (b)      STOCKHOLDER APPROVAL. The Board, in its sole discretion, may
submit any other amendment to the Plan for stockholder approval.

         (c)      NO IMPAIRMENT OF RIGHTS. Rights under any Option granted
before amendment of the Plan shall not be impaired by any amendment of the Plan
unless (i) the Company requests the consent of the Optionholder and (ii) the
Optionholder consents in writing.

         (d)      AMENDMENT OF OPTIONS. The Board, at any time, and from time to
time, may amend the terms of any one or more Options; provided, however, that
the rights under any Option shall not be impaired by any such amendment unless
(i) the Company requests the consent of the Optionholder and (ii) the
Optionholder consents in writing.

13.      TERMINATION OR SUSPENSION OF THE PLAN.

         (a)      PLAN TERM. The Board may suspend or terminate the Plan at any
time. No Options may be granted under the Plan while the Plan is suspended or
after it is terminated.

         (b)      NO IMPAIRMENT OF RIGHTS. Suspension or termination of the Plan
shall not impair rights and obligations under any Option granted while the Plan
is in effect except with the written consent of the Optionholder.

14.      EFFECTIVE DATE OF PLAN.

         The Plan shall become effective on the IPO Date, but no Option shall be
exercised unless and until the Plan has been approved by the stockholders of the
Company, which approval shall be within twelve (12) months before or after the
date the Plan is adopted by the Board.

15.      CHOICE OF LAW.

         The law of the state of Delaware shall govern all questions concerning
the construction, validity and interpretation of this Plan, without regard to
such state's conflict of laws rules.

                                      13.<PAGE>

                                                                    EXHIBIT 10.6

                              GENITOPE CORPORATION

                        2003 EMPLOYEE STOCK PURCHASE PLAN

                             ADOPTED AUGUST 7, 2003
                   APPROVED BY STOCKHOLDERS August 29, 2003

1.       PURPOSE.

         (a)      The purpose of the Plan is to provide a means by which
Employees of the Company and certain designated Related Corporations may be
given an opportunity to purchase shares of the Common Stock of the Company.

         (b)      The Company, by means of the Plan, seeks to retain the
services of such Employees, to secure and retain the services of new Employees
and to provide incentives for such persons to exert maximum efforts for the
success of the Company and its Related Corporations.

         (c)      The Company intends that the Purchase Rights be considered
options issued under an Employee Stock Purchase Plan.

2.       DEFINITIONS.

         (a)      "BOARD" means the Board of Directors of the Company.

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

         (c)      "COMMITTEE" means a committee appointed by the Board in
accordance with Section 3(c) of the Plan.

         (d)      "COMMON STOCK" means the common stock of the Company.

         (e)      "COMPANY" means Genitope Corporation, a Delaware corporation.

         (f)      "CONTRIBUTIONS" means the payroll deductions and other
additional payments that a Participant contributes to fund the exercise of a
Purchase Right. A Participant may make payments not through payroll deductions
only if specifically provided for in the Offering, and then only if the
Participant has not already had the maximum permitted amount withheld through
payroll deductions during the Offering.

         (g)      "CORPORATE TRANSACTION" means the occurrence, in a single
transaction or in a series of related transactions, of any one or more of the
following events:

                  (i)      a sale, lease, license or other disposition of all or
substantially all of the consolidated assets of the Company;

                                       1.

<PAGE>

                  (ii)     a sale or other disposition of at least ninety
percent (90%) of the outstanding securities of the Company;

                  (iii)    a merger, consolidation or similar transaction
following which the Company is not the surviving corporation; or

                  (iv)     a merger, consolidation or similar transaction
following which the Company is the surviving corporation but the shares of
Common Stock outstanding immediately preceding the merger, consolidation or
similar transaction are converted or exchanged by virtue of the merger,
consolidation or similar transaction into other property, whether in the form of
securities, cash or otherwise.

         (h)      "DIRECTOR" means a member of the Board.

         (i)      "ELIGIBLE EMPLOYEE" means an Employee who meets the
requirements set forth in the Offering for eligibility to participate in the
Offering, provided that such Employee also meets the requirements for
eligibility to participate set forth in the Plan.

         (j)      "EMPLOYEE" means any person, including Officers and Directors,
who is employed for purposes of Section 423(b)(4) of the Code by the Company or
a Related Corporation. Neither service as a Director nor payment of a director's
fee shall be sufficient to make an individual an Employee of the Company or a
Related Corporation.

         (k)      "EMPLOYEE STOCK PURCHASE PLAN" means a plan that grants
Purchase Rights intended to be options issued under an "employee stock purchase
plan," as that term is defined in Section 423(b) of the Code.

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

         (m)      "FAIR MARKET VALUE" means the value of a security, as
determined in good faith by the Board. If the security is listed on any
established stock exchange or traded on the Nasdaq National Market or the Nasdaq
SmallCap Market, the Fair Market Value of the security, unless otherwise
determined by the Board, shall be the closing sales price (rounded up where
necessary to the nearest whole cent) for such security (or the closing bid, if
no sales were reported) as quoted on such exchange or market (or the exchange or
market with the greatest volume of trading in the relevant security of the
Company) on the Trading Day prior to the relevant determination date, as
reported in The Wall Street Journal or such other source as the Board deems
reliable.

         (n)      "OFFERING" means the grant of Purchase Rights to purchase
shares of Common Stock under the Plan to Eligible Employees.

         (o)      "OFFERING DATE" means a date selected by the Board for an
Offering to commence.

         (p)      "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>

         (q)      "PARTICIPANT" means an Eligible Employee who holds an
outstanding Purchase Right granted pursuant to the Plan.

         (r)      "PLAN" means this Genitope Corporation 2003 Employee Stock
Purchase Plan.

         (s)      "PURCHASE DATE" means one or more dates during an Offering
established by the Board on which Purchase Rights shall be exercised and as of
which purchases of shares of Common Stock shall be carried out in accordance
with such Offering.

         (t)      "PURCHASE PERIOD" means a period of time specified within an
Offering beginning on the Offering Date or on the next day following a Purchase
Date within an Offering and ending on a Purchase Date. An Offering may consist
of one or more Purchase Periods.

         (u)      "PURCHASE RIGHT" means an option to purchase shares of Common
Stock granted pursuant to the Plan.

         (v)      "RELATED CORPORATION" means any parent corporation or
subsidiary corporation, whether now or hereafter existing, as those terms are
defined in Sections 424(e) and (f), respectively, of the Code.

         (w)      "SECURITIES ACT" means the Securities Act of 1933, as amended.

         (x)      "TRADING DAY" means any day on which the exchange(s) or
market(s) on which shares of Common Stock are listed, whether it be an
established stock exchange, the Nasdaq National Market, the Nasdaq SmallCap
Market or otherwise, is open for trading.

3.       ADMINISTRATION.

         (a)      The Board shall administer the Plan unless and until the Board
delegates administration to a Committee, as provided in Section 3(c). Whether or
not the Board has delegated administration, the Board shall have the final power
to determine all questions of policy and expediency that may arise in the
administration of the Plan.

         (b)      The Board (or the Committee) shall have the power, subject to,
and within the limitations of, the express provisions of the Plan:

                  (i)      To determine when and how Purchase Rights to purchase
shares of Common Stock shall be granted and the provisions of each Offering of
such Purchase Rights (which need not be identical).

                  (ii)     To designate from time to time which Related
Corporations of the Company shall be eligible to participate in the Plan.

                  (iii)    To construe and interpret the Plan and Purchase
Rights, and to establish, amend and revoke rules and regulations for the
administration of the Plan. The Board, in the exercise of this power, may
correct any defect, omission or inconsistency in the Plan, in a manner and to
the extent it shall deem necessary or expedient to make the Plan fully
effective.

                                       3.
<PAGE>
                  (iv)     To amend the Plan as provided in Section 15.

                  (v)      Generally, to exercise such powers and to perform
such acts as it deems necessary or expedient to promote the best interests of
the Company and its Related Corporations and to carry out the intent that the
Plan be treated as an Employee Stock Purchase Plan.

         (c)      The Board may delegate administration of the Plan to a
Committee of the Board composed of one (1) or more members of the Board. If
administration is delegated to a Committee, the Committee shall have, in
connection with the administration of the Plan, the powers theretofore possessed
by the Board, subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the Plan. If administration is delegated to a Committee,
references to the Board in this Plan and in the Offering document shall
thereafter be deemed to be to the Board or the Committee, as the case may be.

         (d)      All determinations, interpretations and constructions made by
the Board in good faith shall not be subject to review by any person and shall
be final, binding and conclusive on all persons.

4.       SHARES OF COMMON STOCK SUBJECT TO THE PLAN.

         Subject to the provisions of Section 14 relating to adjustments upon
changes in securities, the shares of Common Stock that may be sold pursuant to
Purchase Rights shall not exceed in the aggregate one hundred thousand (100,000)
shares of Common Stock, plus an annual increase to be added on the first day of
the fiscal year of the Company for a period of ten (10) years, commencing on the
first day of the fiscal year that begins on January 1, 2004 and ending on (and
including) the first day of the fiscal year that begins on January 1, 2023 (each
such day, a "Calculation Date"), equal to the lesser of (i) one and one-half
percent (1.5%) of the shares of Common Stock outstanding on each such
Calculation Date (rounded down to the nearest whole share); or (ii) one hundred
sixty-six thousand (166,000) shares of Common Stock. Notwithstanding the
foregoing, the Board may act, prior to the first day of any fiscal year of the
Company, to increase the share reserve by such number of shares of Common Stock
as the Board shall determine, which number shall be less than each of (i) and
(ii). If any Purchase Right granted under the Plan shall for any reason
terminate without having been exercised, the shares of Common Stock not
purchased under such Purchase Right shall again become available for issuance
under the Plan.

5.       GRANT OF PURCHASE RIGHTS; OFFERING.

         (a)      The Board may from time to time grant or provide for the grant
of Purchase Rights to purchase shares of Common Stock under the Plan to Eligible
Employees in an Offering (consisting of one or more Purchase Periods) on an
Offering Date or Offering Dates selected by the Board. Each Offering shall be in
such form and shall contain such terms and conditions as the Board shall deem
appropriate, which shall comply with the requirement of Section 423(b)(5) of the
Code that all Employees granted Purchase Rights shall have the same rights and
privileges. The terms and conditions of an Offering shall be incorporated by
reference into the

                                       4.

<PAGE>

Plan and treated as part of the Plan. The provisions of separate Offerings need
not be identical, but each Offering shall include (through incorporation of the
provisions of this Plan by reference in the document comprising the Offering or
otherwise) the period during which the Offering shall be effective, which period
shall not exceed twenty-seven (27) months beginning with the Offering Date, and
the substance of the provisions contained in Sections 6 through 9, inclusive.

         (b)      If a Participant has more than one Purchase Right outstanding
under the Plan, unless he or she otherwise indicates in agreements or notices
delivered hereunder: (i) each agreement or notice delivered by that Participant
shall be deemed to apply to all of his or her Purchase Rights under the Plan,
and (ii) a Purchase Right with a lower exercise price (or an earlier-granted
Purchase Right, if different Purchase Rights have identical exercise prices)
shall be exercised to the fullest possible extent before a Purchase Right with a
higher exercise price (or a later-granted Purchase Right if different Purchase
Rights have identical exercise prices) shall be exercised.

6.       ELIGIBILITY.

         (a)      Purchase Rights may be granted only to Employees of the
Company or, as the Board may designate as provided in Section 3(b), to Employees
of a Related Corporation. Except as provided in Section 6(b), an Employee shall
not be eligible to be granted Purchase Rights under the Plan unless, on the
Offering Date, such Employee has been in the employ of the Company or the
Related Corporation, as the case may be, for such continuous period preceding
such Offering Date as the Board may require, but in no event shall the required
period of continuous employment be greater than two (2) years. In addition, the
Board may provide that no Employee shall be eligible to be granted Purchase
Rights under the Plan unless, on the Offering Date, such Employee's customary
employment with the Company or the Related Corporation is more than twenty (20)
hours per week and/or more than five (5) months per calendar year.

         (b)      The Board may provide that each person who, during the course
of an Offering, first becomes an Eligible Employee shall, on a date or dates
specified in the Offering which coincides with the day on which such person
becomes an Eligible Employee or which occurs thereafter, receive a Purchase
Right under that Offering, which Purchase Right shall thereafter be deemed to be
a part of that Offering. Such Purchase Right shall have the same characteristics
as any Purchase Rights originally granted under that Offering, as described
herein, except that:

                  (i)      the date on which such Purchase Right is granted
shall be the "Offering Date" of such Purchase Right for all purposes, including
determination of the exercise price of such Purchase Right;

                  (ii)     the period of the Offering with respect to such
Purchase Right shall begin on its Offering Date and end coincident with the end
of such Offering; and

                  (iii)    the Board may provide that if such person first
becomes an Eligible Employee within a specified period of time before the end of
the Offering, he or she shall not receive any Purchase Right under that
Offering.

                                       5.

<PAGE>

         (c)      No Employee shall be eligible for the grant of any Purchase
Rights under the Plan if, immediately after any such Purchase Rights are
granted, such Employee owns stock possessing five percent (5%) or more of the
total combined voting power or value of all classes of stock of the Company or
of any Related Corporation. For purposes of this Section 6(c), the rules of
Section 424(d) of the Code shall apply in determining the stock ownership of any
Employee, and stock which such Employee may purchase under all outstanding
Purchase Rights and options shall be treated as stock owned by such Employee.

         (d)      As specified by Section 423(b)(8) of the Code, an Eligible
Employee may be granted Purchase Rights under the Plan only if such Purchase
Rights, together with any other rights granted under all Employee Stock Purchase
Plans of the Company and any Related Corporations, do not permit such Eligible
Employee's rights to purchase stock of the Company or any Related Corporation to
accrue at a rate which exceeds twenty five thousand dollars ($25,000) of Fair
Market Value of such stock (determined at the time such rights are granted, and
which, with respect to the Plan, shall be determined as of their respective
Offering Dates) for each calendar year in which such rights are outstanding at
any time.

         (e)      Officers of the Company and any designated Related
Corporation, if they are otherwise Eligible Employees, shall be eligible to
participate in Offerings under the Plan. Notwithstanding the foregoing, the
Board may provide in an Offering that Employees who are highly compensated
Employees within the meaning of Section 423(b)(4)(D) of the Code shall not be
eligible to participate.

7.       PURCHASE RIGHTS; PURCHASE PRICE.

         (a)      On each Offering Date, each Eligible Employee, pursuant to an
Offering made under the Plan, shall be granted a Purchase Right to purchase up
to that number of shares of Common Stock purchasable either with a percentage or
with a maximum dollar amount, as designated by the Board, but in either case not
exceeding fifteen percent (15%), of such Employee's Earnings (as defined by the
Board in each Offering) during the period that begins on the Offering Date (or
such later date as the Board determines for a particular Offering) and ends on
the date stated in the Offering, which date shall be no later than the end of
the Offering.

         (b)      The Board shall establish one (1) or more Purchase Dates
during an Offering as of which Purchase Rights granted pursuant to that Offering
shall be exercised and purchases of shares of Common Stock shall be carried out
in accordance with such Offering.

         (c)      In connection with each Offering made under the Plan, the
Board may specify a maximum number of shares of Common Stock that may be
purchased by any Participant on any Purchase Date during such Offering. In
connection with each Offering made under the Plan, the Board may specify a
maximum aggregate number of shares of Common Stock that may be purchased by all
Participants pursuant to such Offering. In addition, in connection with each
Offering that contains more than one Purchase Date, the Board may specify a
maximum aggregate number of shares of Common Stock that may be purchased by all
Participants on any Purchase Date under the Offering. If the aggregate purchase
of shares of Common Stock issuable upon exercise of Purchase Rights granted
under the Offering would exceed any such maximum aggregate number, then, in the
absence of any Board action otherwise, a pro rata

                                       6.

<PAGE>

allocation of the shares of Common Stock available shall be made in as nearly a
uniform manner as shall be practicable and equitable.

         (d)      The purchase price of shares of Common Stock acquired pursuant
to Purchase Rights shall be not less than the lesser of:

                  (i)      an amount equal to eighty-five percent (85%) of the
Fair Market Value of the shares of Common Stock on the Offering Date; or

                  (ii)     an amount equal to eighty-five percent (85%) of the
Fair Market Value of the shares of Common Stock on the applicable Purchase Date.

8.       PARTICIPATION; WITHDRAWAL; TERMINATION.

         (a)      A Participant may elect to authorize payroll deductions
pursuant to an Offering under the Plan by completing and delivering to the
Company, within the time specified in the Offering, an enrollment form (in such
form as the Company may provide). Each such enrollment form shall authorize an
amount of Contributions expressed as a percentage of the submitting
Participant's Earnings (as defined in each Offering) during the Offering (not to
exceed the maximum percentage specified by the Board). Each Participant's
Contributions shall remain the property of the Participant at all times prior to
the purchase of Common Stock, but such Contributions may be commingled with the
assets of the Company and used for general corporate purposes except where
applicable law requires that Contributions be deposited with an independent
third party. To the extent provided in the Offering, a Participant may begin
making Contributions after the beginning of the Offering. To the extent provided
in the Offering, a Participant may thereafter reduce (including to zero) or
increase his or her Contributions. To the extent specifically provided in the
Offering, in addition to making Contributions by payroll deductions, a
Participant may make Contributions through the payment by cash or check prior to
each Purchase Date of the Offering.

         (b)      During an Offering, a Participant may cease making
Contributions and withdraw from the Offering by delivering to the Company a
notice of withdrawal in such form as the Company may provide. Such withdrawal
may be elected at any time prior to the end of the Offering, except as provided
otherwise in the Offering. Upon such withdrawal from the Offering by a
Participant, the Company shall distribute to such Participant all of his or her
accumulated Contributions (reduced to the extent, if any, such Contributions
have been used to acquire shares of Common Stock for the Participant) under the
Offering, and such Participant's Purchase Right in that Offering shall thereupon
terminate. A Participant's withdrawal from an Offering shall have no effect upon
such Participant's eligibility to participate in any other Offerings under the
Plan, but such Participant shall be required to deliver a new enrollment form in
order to participate in subsequent Offerings.

         (c)      Purchase Rights granted pursuant to any Offering under the
Plan shall terminate immediately upon a Participant ceasing to be an Employee
for any reason or for no reason (subject to any post-employment participation
period required by law) or other lack of eligibility. The Company shall
distribute to such terminated or otherwise ineligible Employee all of his or her
accumulated Contributions (reduced to the extent, if any, such Contributions
have been used

                                       7.

<PAGE>

to acquire shares of Common Stock for the terminated or otherwise ineligible
Employee) under the Offering.

         (d)      Purchase Rights shall not be transferable by a Participant
otherwise than by will, the laws of descent and distribution, or a beneficiary
designation as provided in Section 13. During a Participant's lifetime, Purchase
Rights shall be exercisable only by such Participant.

         (e)      Unless otherwise specified in an Offering, the Company shall
have no obligation to pay interest on Contributions.

9.       EXERCISE.

         (a)      On each Purchase Date during an Offering, each Participant's
accumulated Contributions shall be applied to the purchase of shares of Common
Stock up to the maximum number of shares of Common Stock permitted pursuant to
the terms of the Plan and the applicable Offering, at the purchase price
specified in the Offering. No fractional shares shall be issued upon the
exercise of Purchase Rights unless specifically provided for in the Offering.

         (b)      If any amount of accumulated Contributions remains in a
Participant's account after the purchase of shares of Common Stock and such
remaining amount is less than the amount required to purchase one share of
Common Stock on the final Purchase Date of an Offering, then such remaining
amount shall be held in such Participant's account for the purchase of shares of
Common Stock under the next Offering under the Plan, unless such Participant
withdraws from such next Offering, as provided in Section 8(b), or is not
eligible to participate in such Offering, as provided in Section 6, in which
case such amount shall be distributed to such Participant after the final
Purchase Date, without interest. If the amount of Contributions remaining in a
Participant's account after the purchase of shares of Common Stock is at least
equal to the amount required to purchase one (1) whole share of Common Stock on
the final Purchase Date of the Offering, then such remaining amount shall be
distributed in full to such Participant at the end of the Offering.

         (c)      No Purchase Rights may be exercised to any extent unless the
shares of Common Stock to be issued upon such exercise under the Plan are
covered by an effective registration statement pursuant to the Securities Act
and the Plan is in material compliance with all laws applicable to the Plan. If
on a Purchase Date during any Offering hereunder the shares of Common Stock are
not so registered or the Plan is not in such compliance, no Purchase Rights or
any Offering shall be exercised on such Purchase Date, and the Purchase Date
shall be delayed until the shares of Common Stock are subject to such an
effective registration statement and the Plan is in such compliance, except that
the Purchase Date shall not be delayed more than twelve (12) months and the
Purchase Date shall in no event be more than twenty-seven (27) months from the
Offering Date. If, on the Purchase Date under any Offering hereunder, as delayed
to the maximum extent permissible, the shares of Common Stock are not registered
and the Plan is not in such compliance, no Purchase Rights or any Offering shall
be exercised and all Contributions accumulated during the Offering (reduced to
the extent, if any, such Contributions have been used to acquire shares of
Common Stock) shall be distributed to the Participants.

                                       8.

<PAGE>

10.      COVENANTS OF THE COMPANY.

         The Company shall seek to obtain from each federal, state, foreign or
other regulatory commission or agency having jurisdiction over the Plan such
authority as may be required to issue and sell shares of Common Stock upon
exercise of the Purchase Rights. If, after commercially reasonable efforts, the
Company is unable to obtain from any such regulatory commission or agency the
authority that counsel for the Company deems necessary for the lawful issuance
and sale of shares of Common Stock under the Plan, the Company shall be relieved
from any liability for failure to issue and sell shares of Common Stock upon
exercise of such Purchase Rights unless and until such authority is obtained.

11.      USE OF PROCEEDS FROM SHARES OF COMMON STOCK.

         Proceeds from the sale of shares of Common Stock pursuant to Purchase
Rights shall constitute general funds of the Company.

12.      RIGHTS AS A STOCKHOLDER.

         A Participant shall not be deemed to be the holder of, or to have any
of the rights of a holder with respect to, shares of Common Stock subject to
Purchase Rights unless and until the Participant's shares of Common Stock
acquired upon exercise of Purchase Rights are recorded in the books of the
Company (or its transfer agent).

13.      DESIGNATION OF BENEFICIARY.

         (a)      A Participant may file a written designation of a beneficiary
who is to receive any shares of Common Stock and/or cash, if any, from the
Participant's account under the Plan in the event of such Participant's death
subsequent to the end of an Offering but prior to delivery to the Participant of
such shares of Common Stock or cash. In addition, a Participant may file a
written designation of a beneficiary who is to receive any cash from the
Participant's account under the Plan in the event of such Participant's death
during an Offering. Any such designation shall be on a form provided by or
otherwise acceptable to the Company.

         (b)      The Participant may change such designation of beneficiary at
any time by written notice to the Company. In the event of the death of a
Participant and in the absence of a beneficiary validly designated under the
Plan who is living at the time of such Participant's death, the Company shall
deliver such shares of Common Stock and/or cash to the executor or administrator
of the estate of the Participant, or if no such executor or administrator has
been appointed (to the knowledge of the Company), the Company, in its sole
discretion, may deliver such shares of Common Stock and/or cash to the spouse or
to any one or more dependents or relatives of the Participant, or if no spouse,
dependent or relative is known to the Company, then to such other person as the
Company may designate.

14.      ADJUSTMENTS UPON CHANGES IN SECURITIES; CORPORATE TRANSACTIONS.

         (a)      If any change is made in the shares of Common Stock, subject
to the Plan, or subject to any Purchase Right, without the receipt of
consideration by the Company (through merger, consolidation, reorganization,
recapitalization, reincorporation, stock dividend, dividend

                                       9.

<PAGE>

in property other than cash, stock split, liquidating dividend, combination of
shares, exchange of shares, change in corporate structure or other transaction
not involving the receipt of consideration by the Company), the Plan shall be
appropriately adjusted in the type(s), class(es) and maximum number of shares of
Common Stock subject to the Plan pursuant to Section 4(a), and the outstanding
Purchase Rights shall be appropriately adjusted in the type(s), class(es),
number of shares and purchase limits of such outstanding Purchase Rights. The
Board shall make such adjustments, and its determination shall be final, binding
and conclusive. (The conversion of any convertible securities of the Company
shall not be treated as a "transaction not involving the receipt of
consideration by the Company.")

         (b)      In the event of a Corporate Transaction, then: (i) any
surviving or acquiring corporation may continue or assume Purchase Rights
outstanding under the Plan or may substitute similar rights (including a right
to acquire the same consideration paid to stockholders in the Corporate
Transaction) for those outstanding under the Plan, or (ii) if any surviving or
acquiring corporation does not continue or assume such Purchase Rights or does
not substitute similar rights for Purchase Rights outstanding under the Plan,
then, the Participants' accumulated Contributions shall be used to purchase
shares of Common Stock within ten (10) business days prior to the Corporate
Transaction under the ongoing Offering, and the Participants' Purchase Rights
under the ongoing Offering shall terminate immediately after such purchase.

15.      AMENDMENT OF THE PLAN.

         (a)      The Board at any time, and from time to time, may amend the
Plan. However, except as provided in Section 14 relating to adjustments upon
changes in securities and except as to amendments solely to benefit the
administration of the Plan, to take account of a change in legislation or to
obtain or maintain favorable tax, exchange control or regulatory treatment for
Participants or the Company or any Related Corporation, no amendment shall be
effective unless approved by the stockholders of the Company to the extent
stockholder approval is necessary for the Plan to satisfy the requirements of
Section 423 of the Code or other applicable laws or regulations.

         (b)      It is expressly contemplated that the Board may amend the Plan
in any respect the Board deems necessary or advisable to provide Employees with
the maximum benefits provided or to be provided under the provisions of the Code
and the regulations promulgated thereunder relating to Employee Stock Purchase
Plans or to bring the Plan and/or Purchase Rights into compliance therewith.

         (c)      The rights and obligations under any Purchase Rights granted
before amendment of the Plan shall not be impaired by any amendment of the Plan
except: (i) with the consent of the person to whom such Purchase Rights were
granted, or (ii) as necessary to comply with any laws or governmental
regulations (including, without limitation, the provisions of the Code and the
regulations promulgated thereunder relating to Employee Stock Purchase Plans).

16.      TERMINATION OR SUSPENSION OF THE PLAN.

         (a)      The Board in its discretion may suspend or terminate the Plan
at any time. Unless sooner terminated, the Plan shall terminate at the time that
all of the shares of Common Stock

                                      10.

<PAGE>

reserved for issuance under the Plan, as increased and/or adjusted from time to
time, have been issued under the terms of the Plan. No Purchase Rights may be
granted under the Plan while the Plan is suspended or after it is terminated.

         (b)      Any benefits, privileges, entitlements and obligations under
any Purchase Rights while the Plan is in effect shall not be impaired by
suspension or termination of the Plan except (i) as expressly provided in the
Plan or with the consent of the person to whom such Purchase Rights were
granted, (ii) as necessary to comply with any laws, regulations, or listing
requirements, or (iii) as necessary to ensure that the Plan and/or Purchase
Rights comply with the requirements of Section 423 of the Code.

17.      EFFECTIVE DATE OF PLAN.

                  The Plan shall become effective as determined by the Board,
but no Purchase Rights shall be exercised unless and until the Plan has been
approved by the stockholders of the Company within twelve (12) months before or
after the date the Plan is adopted by the Board.

18.      MISCELLANEOUS PROVISIONS.

         (a)      The Plan and Offering do not constitute an employment
contract. Nothing in the Plan or in the Offering shall in any way alter the at
will nature of a Participant's employment or be deemed to create in any way
whatsoever any obligation on the part of any Participant to continue in the
employ of the Company or a Related Corporation, or on the part of the Company or
a Related Corporation to continue the employment of a Participant.

         (b)      The provisions of the Plan shall be governed by the laws of
the State of Delaware without resort to that state's conflicts of laws rules.

                                      11.

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