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                                                                    EXHIBIT 10.3

                            ACLARA BIOSCIENCES, INC.
                                 1997 STOCK PLAN


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

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

             -     to provide additional incentive to Employees and
                   Consultants, and

             -     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) "Administrator" 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 legal requirements relating to the
administration of stock option plans under state corporate and securities laws
and the Code.

             (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 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 ACLARA BioSciences, Inc., a Delaware
corporation.

             (h) "Consultant" means any person, including an advisor, engaged by
the Company or a Parent or Subsidiary to render services and who is compensated
for such services. The term "Consultant" shall not include Directors who are
paid only a director's fee by the Company or who are not compensated by the
Company for their services as Directors.

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             (i) "Continuous Status as an Employee or Consultant" means that the
employment or consulting relationship with the Company, any Parent, or
Subsidiary, is not interrupted or terminated. Continuous Status as an Employee
or Consultant shall not be considered interrupted 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. A
leave of absence approved by the Company shall include sick leave, military
leave, or any other personal leave approved by an authorized representative of
the Company. For purposes of Incentive Stock Options, no such leave may exceed
90 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.

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

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

             (1) "Employee" means any person, including Officers and Directors,
employed by the Company or any Parent or Subsidiary of the Company. Neither
service as a Director nor payment of a director's fee by the Company shall be
sufficient to constitute "employment" by the Company.

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

             (n) "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 a national market system, including without limitation the Nasdaq
National Market of the National Association of Securities Dealers, Inc.
Automated Quotation ("Nasdaq") System, 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 system or exchange (or the
exchange with the greatest volume of trading in 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 Administrator deems reliable;

                   (ii) If the Common Stock is quoted on the Nasdaq System (but
not on the Nasdaq National Market thereof) or 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 last market trading day prior
to the day of determination, as reported in The Wall Street Journal or such
other source as the Administrator deems reliable;

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                   (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.

             (o) "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.

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

             (q) "Notice of Grant" means a written 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 in the case of an Option and is
accompanied by a Restricted Stock Purchase Agreement in the case of a Stock
Purchase Right.

             (r) "Office" 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.

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

             (t) "Option Agreement" means a written 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.

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

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

             (w) "Optionee" means an Employee or Consultant who holds an
outstanding Option or Stock Purchase Right.

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

             (y) "Plan" means this 1997 Stock Plan.

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

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             (aa) "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.

             (ab) "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.

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

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

             (ae) "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 sold or optioned
and sold under the Plan is 3,342,669 Shares. The Shares may be authorized, but
unissued, or reacquired Common Stock.

            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, and the original purchaser of such
Shares did not receive any benefits of ownership of such Shares, such Shares
shall become available for future grant under the Plan. For purposes of the
preceding sentence, voting rights shall not be considered a benefit of Share
ownership.

       4. Administration of the Plan.

            (a) Procedure.

                  (i) Multiple Administrative Bodies. If permitted by Rule
16b-3, the Plan may be administered by different bodies with respect to
Directors, Officers who are not Directors, and Employees who are neither
Directors nor Officers.

                  (ii) Administration With Respect to Directors and Officers
Subject to Section 16(b). With respect to Option or Stock Purchase Right grants
made to Employees who are also Officers or Directors subject to Section 16(b) of
the Exchange Act, the Plan shall be administered by (A) the Board, if the Board
may administer the Plan in compliance with the rules governing a plan intended
to qualify as a discretionary plan under Rule 16b-3, or (B) a

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committee designated by the Board to administer the Plan, which committee shall
be constituted to comply with the rules governing a plan intended to qualify as
a discretionary plan under Rule 16b-3. Once appointed, such Committee shall
continue to serve in its designated capacity until otherwise directed by the
Board. From time to time the Board may increase the size of the Committee and
appoint additional members, remove members (with or without cause) and
substitute new members, fill vacancies (however caused), and remove all members
of the Committee and thereafter directly administer the Plan, all to the extent
permitted by the rules governing a plan intended to qualify as a discretionary
plan under Rule 16b-3.

                  (iii) Administration With Respect to Other Persons. With
respect to Option or Stock Purchase Right grants made to Employees or
Consultants who are neither Directors nor Officers of the Company, the Plan
shall be administered by (A) the Board or (B) a committee designated by the
Board, which committee shall be constituted to satisfy Applicable Laws. Once
appointed, such Committee shall serve in its designated capacity until otherwise
directed by the Board. The Board may increase the size of the Committee and
appoint additional members, remove members (with or without cause) and
substitute new members, fill vacancies (however caused), and remove all members
of the Committee and thereafter directly administer the Plan, all to the extent
permitted by 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 of the Common Stock, in
accordance with Section 2(n) of the Plan;

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

                  (iii) to determine whether and to what extent Options and
Stock Purchase Rights or any combination thereof, are granted hereunder;

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

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

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

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                  (vii) 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;

                  (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 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;

                  (xii) to institute an Option Exchange Program;

                  (xiii) to determine the terms and restrictions applicable to
Options and Stock Purchase Rights and any Restricted Stock; and

                  (xiv) 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. Nonstatutory Stock Options and Stock Purchase Rights may
be granted to Employees and Consultants. Incentive Stock Options may be granted
only to Employees. If otherwise eligible, an Employee or Consultant who has been
granted an Option or Stock Purchase Right may be granted additional Options or
Stock Purchase Rights.

       6. Limitations.

             (a) Each Option shall be designated in the Notice of Grant as
either an Incentive Stock Option or a Nonstatutory Stock Option. However,
notwithstanding such designations, to the extent that the aggregate Fair Market
Value:

                  (i) of Shares subject to an Optionee's Incentive Stock Options
granted by the Company, any Parent or Subsidiary, which

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                  (ii) become exercisable for the first time during any calendar
year (under all plans of the Company or any Parent or Subsidiary) exceeds
$100,000, such excess 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, and the Fair Market Value of
the Shares shall be determined as of the time of grant.

             (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
employment or consulting relationship with the Company, nor shall they interfere
in any way with the Optionee's right or the Company's right to terminate such
employment or consulting relationship at any time, with or without cause.

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

                  (i) No Employee shall be granted, in any fiscal year of the
Company, Options and Stock Purchase Rights to purchase more than 400,000 Shares.

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

                  (iii) If an Option or Stock Purchase Right is canceled 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 canceled Option or
Stock Purchase Right will be counted against the limit set forth in Section
6(c)(i). For this purpose, if the exercise price of an Option or Stock Purchase
Right is reduced, the transaction will be treated as a cancellation of the
Option or Stock Purchase Right and the grant of a new Option or Stock Purchase
Right.

       7. Term of Plan. Subject to Section 19 of the Plan, the Plan shall become
effective upon the earlier to occur of its adoption by the Board or its approval
by the shareholders of the Company as described in Section 19 of the Plan. 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 Notice
of Grant; provided, however, that 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 Notice of Grant. 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 voting of
all classes of stock of the Company or any Parent or Subsidiary, the term of the
Incentive Stock Option shall be five (5) years from the date of grant or such
shorter term as may vided in the Notice of Grant.

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       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 I 10% 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, but shall in
no event be less than the par value per Share.

             (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. In so doing, the Administrator may specify that an
Option may not be exercised until the completion of a service period.

             (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) money order;

                  (iv)  promissory note;

                  (v) 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 (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;

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                  (vi) delivery of a properly executed exercise notice together
with such other documentation as the Administrator and the broker, if
applicable, shall require to effect an exercise of the Option and delivery to
the Company of the sale or loan proceeds required to pay the exercise price;

                  (vii) 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;

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

                  (ix) 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.

                   An Option may not be exercised for a fraction of a Share.

                   An Option shall be deemed exercised when the Company
receives: (i) written 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 stock certificate evidencing such Shares is 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 shareholder shall exist with respect to the Optioned Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued) such stock certificate 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 stock certificate is 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 Employment or Consulting Relationship.Upon
termination of an Optionee's Continuous Status as an Employee or Consultant (but
not in the event of a change of status from Employee to Consultant (in which
case an Employee's Incentive Stock Option shall automatically convert to a
Nonstatutory Stock Option on the ninety-first

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(91st) day following such change of status) or from Consultant to Employee),
other than upon the Optionee's death or Disability, the Optionee may exercise
his or her Option, but only within such period of time as is specified in the
Notice of Grant, and only to the extent that the Optionee was entitled to
exercise it at the date of termination (but in no event later than the
expiration of the term of such Option as set forth in the Notice of Grant). In
the absence of a specified time in the Notice of Grant, the Option shall remain
exercisable for thirty (30) days following the Optionee's termination of
Continuous Status as an Employee or Consultant. In the case of an Incentive
Stock Option, such period of time shall not exceed ninety (90) days from the
date of termination. If, at the date of termination, the Optionee is not
entitled to exercise his or her entire Option, the Shares covered by the
unexercisable 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, the Option shall terminate, and the Shares covered by such Option
shall revert to the Plan.

             (c) Disability of Optionee.Notwithstanding the provisions of
Section 9(b) above, in the event of termination of an Optionee's Consulting
relationship or Continuous Status as an Employee as a result of his disability
then the period during which each outstanding option held by the Optionee is to
remain exercisable shall be limited to the six (6)-month period following the
date of such cessation of service. However, should such Disability be deemed to
constitute Permanent Disability, then the period during which each outstanding
option held by the Optionee is to remain exercisable shall be extended by an
additional six (6) months so that the exercise period shall be limited to the
twelve (12)-month period following the date of the Optionee's cessation of
Service by reason of such Permanent Disability. For the purposes of the Plan,
Disability shall mean the inability of an individual to engage in any
substantial gainful activity by reason of any medically determinable physical or
mental impairment and shall be determined by the Plan Administrator on the basis
of such medical evidence as the Plan Administrator deems warranted under the
circumstances. Disability shall be deemed to constitute Permanent Disability in
the event that such Disability is expected to result in death or has lasted or
can be expected to last for a continuous period of not less than twelve (12)
months.

             (d) Death of Optionee. In the event of the death of an Optionee,
the Option may be exercised at any time within twelve (12) months (or such other
period of time as is determined by the Administrator, with such determination in
the case of an Incentive Stock Option being made at the time of grant of the
Option) following the date of death (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 acquired the right to exercise the Option
by bequest or inheritance, but only to the extent that the Optionee was entitled
to exercise the Option at the date of death. If, at the time of death, the
Optionee was not entitled to exercise his or her entire Option, the Shares
covered by the unexercisable portion of the Option shall immediately revert to
the Plan. If, after death, the Optionee's estate or a person who acquired the
right to exercise the Option by bequest or inheritance does not exercise the
Option within the time specified herein, the Option shall terminate, and the
Shares covered by such Option shall revert to the Plan.

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             (e) Rule 16b-3. Options granted to individuals subject to Section
16 of the Exchange Act ("Insiders") must comply with the applicable provisions
of Rule 16b-3 and shall contain such additional conditions or restrictions as
may be required thereunder to qualify for the maximum exemption from Section 16
of the Exchange Act with respect to Plan transactions.

             (f) 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.
After the Administrator determines that it will offer Stock Purchase Rights
under the Plan, it shall advise the offeree in writing, 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 shall be entitled to purchase, the price
to be paid, and the time within which the offeree must accept such offer, which
shall in no event exceed thirty (30) days from the date upon which the
Administrator made the determination to grant the Stock Purchase Right. 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 Continuous Status as an Employee or Consultant 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) Rule 16b-3. Stock Purchase Rights granted to Insiders, and
Shares purchased by Insiders in connection with Stock Purchase Rights, shall be
subject to any restrictions applicable thereto in compliance with Rule 16b-3. An
Insider may only purchase Shares pursuant to the grant of a Stock Purchase
Right, and may only sell Shares purchased pursuant to the grant of a Stock
Purchase Right, during such time or times as are permitted by Rule 16b-3.

             (d) 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 including
but not limited to the per Share purchase price, which shall in no event be less
than the par value per Share. In addition, the provisions of Restricted Stock
Purchase Agreements need not be the same with respect to each purchaser.

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             (e) Rights as a Stockholder. Once the Stock Purchase Right is
exercised, the purchaser shall have the rights equivalent to those of a
shareholder, and shall be a shareholder 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. Stock Withholding to Satisfy Withholding Tax Obligations. At the
discretion of the Administrator, Optionees may satisfy withholding obligations
as provided in this paragraph. When an Optionee incurs tax liability in
connection with an Option or Stock Purchase Right, which tax liability is
subject to tax withholding under applicable tax laws, and the Optionee is
obligated to pay the Company an amount required to be withheld under applicable
tax laws, the Optionee may satisfy the withholding tax obligation by electing to
have the Company withhold from the Shares to be issued in connection with the
Stock Purchase Right, if any, 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 (the "Tax Date").

       All elections by an Optionee to have Shares withheld for this purpose
shall be made in writing in a form acceptable to the Administrator and shall be
subject to the following restrictions:

             (a) the election must be made on or prior to the applicable Tax
Date;

             (b) once made, the election shall be irrevocable as to the
particular Shares of the Option or Right as to which the election is made;

             (c) all elections shall be subject to the consent or disapproval of
the Administrator;

             (d) if the Optionee is subject to Rule 16b-3, the election must
comply with the applicable provisions of Rule 16b-3 and shall be subject to such
additional conditions or restrictions as may be required thereunder to qualify
for the maximum exemption from Section 16 of the Exchange Act with respect to
Plan transactions.

       In the event the election to have Shares withheld is made by an Optionee
and the Tax Date is deferred under Section 83 of the Code because no election is
filed under Section 83(b) of the Code, the Optionee shall receive the full
number of Shares with respect to which the Option or Stock Purchase Right is
exercised but such Optionee shall be unconditionally obligated to tender back to
the Company the proper number of Shares on the Tax Date.

       13. Non-Transferability of Options and Stock Purchase Rights. 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.

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

             (a) Changes in Capitalization. Subject to any required action by
the shareholders 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 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 Board shall notify the Optionee
at least fifteen (15) days prior to such proposed action. To the extent it has
not been previously exercised, the 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 may be assumed
or an equivalent option or right may be substituted by the successor corporation
or a Parent or Subsidiary of the successor corporation. The Administrator may,
in lieu of such assumption or substitution, provide for the Optionee to have the
right to exercise the Option or Stock Purchase Right as to all or a portion of
the Optioned Stock, including Shares as to which it would not otherwise be
exercisable. If the Administrator makes an Option or Stock Purchase Right
exercisable in lieu of assumption or substitution in the event of a merger or
sale of assets, the Administrator shall notify the Optionee that the Option or
Stock Purchase Right shall be fully exercisable for a period of fifteen (15)
days from the date of such notice, and the Option or Stock Purchase Right will
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, 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

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<PAGE>   14

was 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.

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

       16. 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 shareholder
approval of any Plan amendment to the extent necessary and desirable to comply
with Rule 16b-3 or with Section 422 of the Code (or any successor rule or
statute or other applicable law, rule or regulation, including the requirements
of any exchange or quotation system on which the Common Stock is listed or
quoted). Such shareholder approval, if required, shall be obtained in such a
manner and to such a degree as is required by the applicable law, rule or
regulation.

             (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.

       17. 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 all relevant provisions of law, including, without limitation, the
Securities Act of 1933, as amended, the Exchange Act, the rules and regulations
promulgated thereunder, Applicable Laws, and the requirements of any stock
exchange or quotation system upon which the Shares may then be listed or quoted,
and shall be further subject to the approval of counsel for the Company with
respect to such compliance.

                                      -14-
<PAGE>   15

             (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.

       18. Liability of Company.

             (a) 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.

             (b) Grants Exceeding Allotted Shares. If the Optioned Stock covered
by an Option or Stock Purchase Right exceeds, as of the date of grant, the
number of Shares which may be issued under the Plan without additional
shareholder approval, such Option or Stock Purchase Right shall be void with
respect to such excess Optioned Stock, unless shareholder approval of an
amendment sufficiently increasing the number of Shares subject to the Plan is
timely obtained in accordance with Section 15(b) of the Plan.

       19. 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.

       20. Stockholder Approval. Continuance of the Plan shall be subject to
approval by the shareholders of the Company within twelve (12) months before or
after the date the Plan is adopted. Such shareholder approval shall be obtained
in the manner and to the degree required under applicable federal and state law.

                                      -15-