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                                                                    EXHIBIT 10.1

                                  MYOGEN, INC.

                           2003 EQUITY INCENTIVE PLAN

                           ADOPTED: SEPTEMBER 24, 2003
                  APPROVED BY STOCKHOLDERS: SEPTEMBER 30, 2003
                      TERMINATION DATE: SEPTEMBER 23, 2013

1.       PURPOSES.

         (a)      ELIGIBLE STOCK AWARD RECIPIENTS. The persons eligible to
receive Stock Awards are the Employees, Directors and Consultants of the Company
and its Affiliates.

         (b)      AVAILABLE STOCK AWARDS. The purpose of the Plan is to provide
a means by which eligible recipients of Stock Awards may be given an opportunity
to benefit from increases in value of the Common Stock through the granting of
the following Stock Awards: (i) Incentive Stock Options, (ii) Nonstatutory Stock
Options, (iii) stock bonuses and (iv) rights to acquire restricted stock.

         (c)      GENERAL PURPOSE. The Company, by means of the Plan, seeks to
retain the services of the group of persons eligible to receive Stock Awards, to
secure and retain the services of new members of this group and to provide
incentives for such persons to exert maximum efforts for the success of the
Company and its Affiliates.

2.       DEFINITIONS.

         (a)      "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.

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

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

         (d)      "CAUSE" means the occurrence of any one or more of the
following: (i) the commission of any crime involving fraud, dishonesty or moral
turpitude; (ii) the attempted commission of or participation in a fraud or act
of dishonesty against the Company that results in (or might have reasonably
resulted in) material harm to the business of the Company; (iii) the
intentional, material violation of any contract or agreement between a
Participant and the Company or any statutory duty a Participant owes to the
Company; or (iv) conduct that constitutes gross insubordination, incompetence or
habitual neglect of duties and that results in (or might have reasonably
resulted in) material harm to the business of the Company; provided, however,
that the action or conduct described in clauses (iii) and (iv) above will
constitute "Cause" only if such action or conduct continues after the Company
has provided Participant with written notice thereof and thirty (30) days to
cure the same.

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         (e)      "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 not be deemed to occur
(A) on account of the acquisition of securities of the Company by an
institutional investor, any affiliate thereof or any other Exchange Act Person
that acquires the Company's securities in a transaction or series of related
transactions that are primarily a private financing transaction for the Company
or (B) 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

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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).

         Notwithstanding the foregoing or any other provision of this Plan, the
definition of Change in Control (or any analogous term) in an individual written
agreement between the Company or any Affiliate and the Participant shall
supersede the foregoing definition with respect to Stock Awards subject to such
agreement (it being understood, however, that if no definition of Change in
Control or any analogous term is set forth in such an individual written
agreement, the foregoing definition shall apply).

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

         (g)      "COMMITTEE" means a committee of one or more members of the
Board appointed by the Board in accordance with Section 3(c).

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

         (i)      "COMPANY" means Myogen, Inc., a Delaware corporation.

         (j)      "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 and who is compensated for such services.
However, the term "Consultant" shall not include Directors who are not
compensated by the Company for their services as Directors, and the payment of a
director's fee by the Company for services as a Director shall not cause a
Director to be considered a "Consultant" for purposes of the Plan.

         (k)      "CONTINUOUS SERVICE" means that the Participant's service with
the Company or an Affiliate, whether as an Employee, Director or Consultant, is
not interrupted or terminated. A change in the capacity in which the Participant
renders service to the Company or an Affiliate as an Employee, Consultant or
Director or a change in the entity for which the Participant renders such
service, provided that there is no interruption or termination of the
Participant's service with the Company or an Affiliate, shall not terminate a
Participant's Continuous Service. For example, a change in status from an
Employee of the Company to a Consultant of an Affiliate or a Director shall 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. Notwithstanding the foregoing, a leave of absence
shall be treated as Continuous Service for purposes of vesting in a Stock Award
only to such extent as may be provided in the Company's leave of absence policy
or in the written terms of the Participant's leave of absence.

         (l)      "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;

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                  (ii)     a sale or other disposition of more than 50% 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.

         (m)      "COVERED EMPLOYEE" means the chief executive officer and the
four (4) other highest compensated officers of the Company for whom total
compensation is required to be reported to stockholders under the Exchange Act,
as determined for purposes of Section 162(m) of the Code.

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

         (o)      "DISABILITY" means the permanent and total disability of a
person within the meaning of Section 22(e)(3) of the Code.

         (p)      "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.

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

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

         (s)      "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.

         (t)      "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

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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.

         (u)      "GOOD REASON" means that, with respect to a particular
Participant, one or more of the following are undertaken by the Company without
such Participant's express written consent: (i) the assignment to such
Participant of any duties or responsibilities that results in a material
diminution in such Participant's function as in effect immediately prior to the
effective date of the Change in Control; provided, however, that a change in
title or reporting relationships shall not provide the basis for a voluntary
termination with Good Reason; (ii) a material reduction by the Company in annual
base salary, as in effect on the effective date of the Change in Control or as
increased thereafter; provided, however, that Good Reason shall not be deemed to
have occurred in the event of a reduction in annual base salary that is pursuant
to a salary reduction program affecting substantially all of the employees of
the Company and that does not adversely affect such Participant to a greater
extent than other similarly situated employees; (iii) any failure by the Company
to continue in effect any benefit plan or program, including incentive plans or
plans with respect to the receipt of securities of the Company, in which such
Participant was participating immediately prior to the effective date of the
Change in Control (hereinafter referred to as "Benefit Plans"), or the taking of
any action by the Company that would adversely affect such Participant's
participation in or reduce such Participant's benefits under the Benefit Plans
or deprive such Participant of any fringe benefit that he/she enjoyed
immediately prior to the effective date of the Change in Control; provided,
however, that Good Reason shall not be deemed to have occurred if the Company
provides for such Participant's participation in benefit plans and programs
that, taken as a whole, are comparable to the Benefit Plans; (iv) a relocation
of such Participant's business office to a location more than fifty (50) miles
from the location at which such Participant performed his/her duties as of the
effective date of the Change in Control, except for required travel by such
Participant on the Company's business to an extent substantially consistent with
his/her business travel obligations prior to the effective date of the Change in
Control; or (v) a material breach by the Company of any provision of the Plan or
the Option Agreement or any other material agreement between such Participant
and the Company concerning the terms and conditions of his/her employment.

         (v)      "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.

         (w)      "NON-EMPLOYEE DIRECTOR" means a Director who either (i) is not
a current Employee or Officer of the Company or its parent or a subsidiary, does
not receive compensation (directly or indirectly) from the Company or its parent
or a subsidiary for services rendered as a consultant or in any capacity other
than as a Director (except for an amount as to which disclosure would not be
required under Item 404(a) of Regulation S-K promulgated pursuant to the
Securities Act ("Regulation S-K")), does not possess an interest in any other
transaction as to which disclosure would be required under Item 404(a) of
Regulation S-K and is not engaged in a

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business relationship as to which disclosure would be required under Item 404(b)
of Regulation S-K; or (ii) is otherwise considered a "non-employee director" for
purposes of Rule 16b-3.

         (x)      "NONSTATUTORY STOCK OPTION" means an Option not intended to
qualify as an Incentive Stock Option.

         (y)      "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.

         (z)      "OPTION" means an Incentive Stock Option or a Nonstatutory
Stock Option granted pursuant to the Plan.

         (aa)     "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.

         (bb)     "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.

         (cc)     "OUTSIDE DIRECTOR" means a Director who either (i) is not a
current employee of the Company or an "affiliated corporation" (within the
meaning of Treasury Regulations promulgated under Section 162(m) of the Code),
is not a former employee of the Company or an "affiliated corporation" who
receives compensation for prior services (other than benefits under a
tax-qualified retirement plan) during the taxable year, was not an officer of
the Company or an "affiliated corporation" at any time, and does not currently
receive remuneration from the Company or an "affiliated corporation," either
directly or indirectly, in any capacity other than as a Director or (ii) is
otherwise considered an "outside director" for purposes of Section 162(m) of the
Code.

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

         (ff)     "PLAN" means this Myogen, Inc. 2003 Equity Incentive Plan.

         (gg)     "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.

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

         (ii)     "STOCK AWARD" means any right granted under the Plan,
including an Option, a stock bonus and a right to acquire restricted stock.

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         (jj)     "STOCK AWARD AGREEMENT" means a written agreement between the
Company and a holder of a Stock Award evidencing the terms and conditions of an
individual Stock Award grant. Each Stock Award Agreement shall be subject to the
terms and conditions of the Plan.

         (kk)     "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%).

         (ll)     "TEN PERCENT STOCKHOLDER" means a person who Owns (or is
deemed to Own pursuant to Section 424(d) of the Code) stock possessing more than
ten percent (10%) of the total combined voting power of all classes of stock of
the Company or of any of its Affiliates.

3.       ADMINISTRATION.

         (a)      ADMINISTRATION BY BOARD. The Board shall administer the Plan
unless and until the Board delegates administration to a Committee, as provided
in Section 3(c).

         (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 from time to time which of the persons
eligible under the Plan shall be granted Stock Awards; when and how each Stock
Award shall be granted; what type or combination of types of Stock Award shall
be granted; the provisions of each Stock Award granted (which need not be
identical), including the time or times when a person shall be permitted to
receive Common Stock pursuant to a Stock Award; and the number of shares of
Common Stock with respect to which a Stock Award shall be granted to each such
person.

                  (ii)     To construe and interpret the Plan and Stock Awards
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 Stock Award Agreement,
in a manner and to the extent it shall deem necessary or expedient to make the
Plan fully effective.

                  (iii)    To effect, at any time and from time to time, with
the consent of any adversely affected Optionholder, (1) the reduction of the
exercise price of any outstanding Option under the Plan, (2) the cancellation of
any outstanding Option under the Plan and the grant in substitution therefor of
(A) a new Option under the Plan covering the same or a different number of
shares of Common Stock, (B) a stock bonus, (C) the right to acquire restricted
stock, and/or (D) cash, or (3) any other action that is treated as a repricing
under generally accepted accounting principles.

                  (iv)     To amend the Plan or a Stock Award as provided in
Section 12.

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                  (v)      To terminate or suspend the Plan as provided in
Section 13.

                  (vi)     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.

         (c)      DELEGATION TO COMMITTEE.

                  (i)      GENERAL. The Board may delegate administration of the
Plan to a Committee or Committees of one (1) or more members of the Board, and
the term "Committee" shall apply to any person or persons to whom such authority
has been delegated. 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, including the power to delegate to a
subcommittee any of the administrative powers the Committee is authorized to
exercise (and references in this Plan to the Board shall thereafter be to the
Committee or subcommittee), 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.

                  (ii)     SECTION 162(m) AND RULE 16b-3 COMPLIANCE. In the
discretion of the Board, the Committee may consist solely of two or more Outside
Directors, in accordance with Section 162(m) of the Code, and/or solely of two
or more Non-Employee Directors, in accordance with Rule 16b-3. In addition, the
Board or the Committee may delegate to a committee of one or more members of the
Board the authority to grant Stock Awards to eligible persons who are either (a)
not then Covered Employees and are not expected to be Covered Employees at the
time of recognition of income resulting from such Stock Award, (b) not persons
with respect to whom the Company wishes to comply with Section 162(m) of the
Code, or (c) not then subject to Section 16 of the Exchange Act.

         (d)      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(a)
relating to Capitalization Adjustments, the shares of Common Stock that may be
issued pursuant to Stock Awards shall not exceed in the aggregate three million
nine hundred twenty-three thousand four hundred sixty-four (3,923,464) 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, 2013 (each such day,
a "Calculation Date"), equal to the lesser of (i) five percent (5%) of the
shares of Common Stock outstanding on each such Calculation Date (rounded down
to the nearest whole share); or (ii) two million five hundred thousand
(2,500,000) 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

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number of shares of Common Stock as the Board shall determine, which number
shall be less than each of (i) and (ii).

         (b)      REVERSION OF SHARES TO THE SHARE RESERVE. If any Stock Award
shall for any reason expire or otherwise terminate, in whole or in part, without
the full amount of shares of Common Stock issuable under such Stock Award having
been issued (treating shares issued subject to repurchase, forfeiture or vesting
as having been issued for this purpose), the shares of Common Stock not issued
under such Stock Award 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; provided, however, that this provision shall not be interpreted to
permit the reversion to the share reserve specified in Section 4(a) of shares
previously issued under the Plan to a Participant that are forfeited back to or
reacquired by the Company because of or in connection with the failure to meet a
contingency or condition required to vest such shares in the Participant.

5.       ELIGIBILITY.

         (a)      ELIGIBILITY FOR SPECIFIC STOCK AWARDS. Incentive Stock Options
may be granted only to Employees. Stock Awards other than Incentive Stock
Options may be granted to Employees, Directors and Consultants.

         (b)      TEN PERCENT STOCKHOLDERS. A Ten Percent Stockholder shall not
be granted an Incentive Stock Option unless the exercise price of such Option is
at least one hundred ten percent (110%) of the Fair Market Value of the Common
Stock on the date of grant and the Option is not exercisable after the
expiration of five (5) years from the date of grant.

         (c)      SECTION 162(m) LIMITATION ON ANNUAL GRANTS. Subject to the
provisions of Section 11(a) relating to Capitalization Adjustments, no Employee
shall be eligible to be granted Options covering more than two million
(2,000,000) shares of Common Stock during any calendar year.

         (d)      CONSULTANTS. A Consultant shall not be eligible for the grant
of a Stock Award if, at the time of grant, a Form S-8 Registration Statement
under the Securities Act ("Form S-8") is not available to register either the
offer or the sale of the Company's securities to such Consultant because of the
nature of the services that the Consultant is providing to the Company, because
the Consultant is not a natural person, or because of any other rule governing
the use of Form S-8, unless the Company determines both (i) that such grant (A)
shall be registered in another manner under the Securities Act (e.g., on a Form
S-3 Registration Statement) or (B) does not require registration under the
Securities Act in order to comply with the requirements of the Securities Act,
if applicable, and (ii) that such grant complies with the securities laws of all
other relevant jurisdictions.

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6.       OPTION PROVISIONS.

         Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. All Options shall be separately
designated Incentive Stock Options or Nonstatutory Stock Options at the time of
grant, and, if certificates are issued, a separate certificate or certificates
shall be issued for shares of Common Stock purchased on exercise of each type of
Option. The provisions of separate Options need not be identical, but 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. Subject to the provisions of Section 5(b) regarding Ten
Percent Stockholders, no Incentive Stock Option shall be exercisable after the
expiration of ten (10) years from the date on which it was granted.

         (b)      EXERCISE PRICE OF AN INCENTIVE STOCK OPTION. Subject to the
provisions of Section 5(b) regarding Ten Percent Stockholders, the exercise
price of each Incentive Stock Option shall be not less than one hundred percent
(100%) of the Fair Market Value of the Common Stock subject to the Option on the
date the Option is granted. Notwithstanding the foregoing, an Incentive Stock
Option may be granted with an exercise price lower than that set forth in the
preceding sentence if such Option is granted pursuant to an assumption or
substitution for another option in a manner satisfying the provisions of Section
424(a) of the Code.

         (c)      EXERCISE PRICE OF A NONSTATUTORY STOCK OPTION. The exercise
price of each Nonstatutory Stock Option shall be not less than eighty-five
percent (85%) of the Fair Market Value of the Common Stock subject to the Option
on the date the Option is granted. Notwithstanding the foregoing, a Nonstatutory
Stock Option may be granted with an exercise price lower than that set forth in
the preceding sentence if such Option is granted pursuant to an assumption or
substitution for another option in a manner satisfying the provisions of Section
424(a) of the Code.

         (d)      CONSIDERATION. The purchase price of Common Stock acquired
pursuant to an Option shall be paid, to the extent permitted by applicable
statutes and regulations, either (i) in cash at the time the Option is exercised
or (ii) at the discretion of the Board at the time of the grant of the Option
(or subsequently in the case of a Nonstatutory Stock Option) (1) by delivery to
the Company of other Common Stock, (2) according to a deferred payment or other
similar arrangement with the Optionholder or (3) in any other form of legal
consideration that may be acceptable to the Board. Unless otherwise specifically
provided in the Option, 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). At any time that the Company is
incorporated in Delaware, payment of the Common Stock's "par value," as defined
in the Delaware General Corporation Law, shall not be made by deferred payment.

                                      10.

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         In the case of any deferred payment arrangement, interest shall be
compounded at least annually and shall be charged at the minimum rate of
interest necessary to avoid (1) the treatment as interest, under any applicable
provisions of the Code, of any amounts other than amounts stated to be interest
under the deferred payment arrangement and (2) the treatment of the Option as a
variable award for financial accounting purposes.

         (e)      TRANSFERABILITY OF AN INCENTIVE STOCK OPTION. An Incentive
Stock Option shall not be transferable except by will or by the laws of descent
and distribution and shall be exercisable during the lifetime of the
Optionholder only by the Optionholder. Notwithstanding the foregoing, the
Optionholder may, by delivering written notice to the Company, in a form
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.

         (f)      TRANSFERABILITY OF A NONSTATUTORY STOCK OPTION. A Nonstatutory
Stock Option shall be transferable to the extent provided in the Option
Agreement. If the Nonstatutory Stock Option does not provide for
transferability, then the Nonstatutory Stock Option shall not be transferable
except by will or by the laws of descent and distribution and shall be
exercisable during the lifetime of the Optionholder only by the Optionholder.
Notwithstanding the foregoing, the Optionholder may, by delivering written
notice to the Company, in a form 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.

         (g)      VESTING GENERALLY. The total number of shares of Common Stock
subject to an Option may, but need not, vest and therefore become exercisable in
periodic installments that may, but need not, be equal. The Option may be
subject to such other terms and conditions on the time or times when it may be
exercised (which may be based on performance or other criteria) as the Board may
deem appropriate. The vesting provisions of individual Options may vary. The
provisions of this Section 6(g) are subject to any Option provisions governing
the minimum number of shares of Common Stock as to which an Option may be
exercised.

         (h)      TERMINATION OF CONTINUOUS SERVICE. In the event that 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 such Option 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 such longer or shorter period specified in the Option
Agreement 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.

         (i)      EXTENSION OF TERMINATION DATE. An Optionholder's Option
Agreement may also provide that 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 of Common Stock 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 set forth in Section
6(a) or (ii) the expiration of a

                                      11.

<PAGE>

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.

         (j)      DISABILITY OF OPTIONHOLDER. In the event that 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 such Option 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 such longer or
shorter period specified in the Option Agreement 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.

         (k)      DEATH OF OPTIONHOLDER. In the event that (i) an Optionholder's
Continuous Service terminates as a result of the Optionholder's death or (ii)
the Optionholder dies within the period (if any) specified in the Option
Agreement 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 such 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 pursuant to Section 6(e) or 6(f), but only
within the period ending on the earlier of (1) the date twelve (12) months
following the date of death (or such longer or shorter period specified in the
Option Agreement 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.

         (l)      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 shares 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.

7.       PROVISIONS OF STOCK AWARDS OTHER THAN OPTIONS.

         (a)      STOCK BONUS AWARDS. Each stock bonus agreement shall be in
such form and shall contain such terms and conditions as the Board shall deem
appropriate. The terms and conditions of stock bonus agreements may change from
time to time, and the terms and conditions of separate stock bonus agreements
need not be identical, but each stock bonus agreement shall include (through
incorporation of provisions hereof by reference in the agreement or otherwise)
the substance of each of the following provisions:

                  (i)      CONSIDERATION. A stock bonus may be awarded in
consideration for past services actually rendered to the Company or an Affiliate
for its benefit.

                                      12.

<PAGE>

                  (ii)     VESTING. Shares of Common Stock awarded under the
stock bonus agreement may, but need not, be subject to a share repurchase option
in favor of the Company in accordance with a vesting schedule to be determined
by the Board.

                  (iii)    TERMINATION OF PARTICIPANT'S CONTINUOUS SERVICE. In
the event that a Participant's Continuous Service terminates, the Company may
reacquire any or all of the shares of Common Stock held by the Participant that
have not vested as of the date of termination under the terms of the stock bonus
agreement. 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
change to earnings for financial accounting purposes) have elapsed following
receipt of the stock bonus unless otherwise specifically provided in the stock
bonus agreement.

                  (iv)     TRANSFERABILITY. Rights to acquire shares of Common
Stock under the stock bonus agreement shall be transferable by the Participant
only upon such terms and conditions as are set forth in the stock bonus
agreement, as the Board shall determine in its discretion, so long as Common
Stock awarded under the stock bonus agreement remains subject to the terms of
the stock bonus agreement.

         (b)      RESTRICTED STOCK AWARDS. Each restricted stock purchase
agreement shall be in such form and shall contain such terms and conditions as
the Board shall deem appropriate. The terms and conditions of the restricted
stock purchase agreements may change from time to time, and the terms and
conditions of separate restricted stock purchase agreements need not be
identical, but each restricted stock purchase agreement shall include (through
incorporation of provisions hereof by reference in the agreement or otherwise)
the substance of each of the following provisions:

                  (i)      PURCHASE PRICE. The purchase price of restricted
stock awards shall not be less than eighty-five percent (85%) of the Common
Stock's Fair Market Value on the date such award is made or at the time the
purchase is consummated.

                  (ii)     CONSIDERATION. The purchase price of Common Stock
acquired pursuant to the restricted stock purchase agreement shall be paid
either: (i) in cash at the time of purchase; (ii) at the discretion of the
Board, according to a deferred payment or other similar arrangement with the
Participant; or (iii) in any other form of legal consideration that may be
acceptable to the Board in its discretion; provided, however, that at any time
that the Company is incorporated in Delaware, then payment of the Common Stock's
"par value," as defined in the Delaware General Corporation Law, shall not be
made by deferred payment.

                  (iii)    VESTING. Shares of Common Stock acquired under the
restricted stock purchase agreement may, but need not, be subject to a share
repurchase option in favor of the Company in accordance with a vesting schedule
to be determined by the Board.

                  (iv)     TERMINATION OF PARTICIPANT'S CONTINUOUS SERVICE. In
the event that a Participant's Continuous Service terminates, the Company may
repurchase or otherwise reacquire any or all of the shares of Common Stock held
by the Participant that have not vested as of the date of termination under the
terms of the restricted stock purchase agreement. The

                                      13.

<PAGE>

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 the purchase of the
restricted stock unless otherwise provided in the restricted stock purchase
agreement.

                  (v)      TRANSFERABILITY. Rights to acquire shares of Common
Stock under the restricted stock purchase agreement shall be transferable by the
Participant only upon such terms and conditions as are set forth in the
restricted stock purchase agreement, as the Board shall determine in its
discretion, so long as Common Stock awarded under the restricted stock purchase
agreement remains subject to the terms of the restricted stock purchase
agreement.

8.       COVENANTS OF THE COMPANY.

         (a)      AVAILABILITY OF SHARES. During the terms of the Stock Awards,
the Company shall keep available at all times the number of shares of Common
Stock required to satisfy such Stock Awards.

         (b)      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 Stock Awards and to issue and sell shares
of Common Stock upon exercise of the Stock Awards; provided, however, that this
undertaking shall not require the Company to register under the Securities Act
the Plan, any Stock Award or any Common Stock issued or issuable pursuant to any
such Stock Award. 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 Common Stock
under the Plan, the Company shall be relieved from any liability for failure to
issue and sell Common Stock upon exercise of such Stock Awards unless and until
such authority is obtained.

9.       USE OF PROCEEDS FROM STOCK.

         Proceeds from the sale of Common Stock pursuant to Stock Awards shall
constitute general funds of the Company.

10.      MISCELLANEOUS.

         (a)      ACCELERATION OF EXERCISABILITY AND VESTING. The Board shall
have the power to accelerate the time at which a Stock Award may first be
exercised or the time during which a Stock Award or any part thereof will vest
in accordance with the Plan, notwithstanding the provisions in the Stock Award
stating the time at which it may first be exercised or the time during which it
will vest.

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

                                      14.

<PAGE>

         (c)      NO EMPLOYMENT OR OTHER SERVICE RIGHTS. Nothing in the Plan or
any instrument executed or Stock Award granted pursuant thereto shall confer
upon any Participant any right to continue to serve the Company or an Affiliate
in the capacity in effect at the time the Stock Award was granted 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.

         (d)      INCENTIVE STOCK OPTION $100,000 LIMITATION. To the extent that
the aggregate Fair Market Value (determined at the time of grant) of Common
Stock with respect to which Incentive Stock Options are exercisable for the
first time by any Optionholder during any calendar year (under all plans of the
Company and its Affiliates) exceeds one hundred thousand dollars ($100,000), the
Options or portions thereof that exceed such limit (according to the order in
which they were granted) shall be treated as Nonstatutory Stock Options,
notwithstanding any contrary provision of any Stock Award Agreement.

         (e)      INVESTMENT ASSURANCES. The Company may require a Participant,
as a condition of exercising or acquiring Common Stock under any Stock Award,
(i) to give written assurances satisfactory to the Company as to the
Participant's knowledge and experience in financial and 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 Stock Award; and (ii) to
give written assurances satisfactory to the Company stating that the Participant
is acquiring Common Stock subject to the Stock Award for the Participant's own
account and not with any present intention of selling or otherwise distributing
the Common Stock. The foregoing requirements, and any assurances given pursuant
to such requirements, shall be inoperative if (1) the issuance of the shares of
Common Stock upon the exercise or acquisition of Common Stock under the Stock
Award 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 Common Stock.

         (f)      WITHHOLDING OBLIGATIONS. To the extent provided by the terms
of a Stock Award Agreement, the Participant may satisfy any federal, state or
local tax withholding obligation relating to the exercise or acquisition of
Common Stock under a Stock Award by any of the following means (in addition to
the Company's right to withhold from any compensation paid to the Participant by
the Company) or by a combination of such means: (i) tendering a cash payment;
(ii) authorizing the Company to withhold shares of Common Stock from the shares
of Common Stock otherwise issuable to the Participant as a result of the
exercise or acquisition of Common Stock under the Stock Award; provided,
however, that no shares of Common Stock are

                                      15.

<PAGE>

withheld with a value exceeding the minimum amount of tax required to be
withheld by law (or such lesser amount as may be necessary to avoid variable
award accounting); or (iii) delivering to the Company owned and unencumbered
shares of Common Stock.

11.      ADJUSTMENTS UPON CHANGES IN STOCK.

         (a)      CAPITALIZATION ADJUSTMENTS. If any change is made in, or other
event occurs with respect to, the Common Stock subject to the Plan or subject to
any Stock Award 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 to the Plan
pursuant to Sections 4(a) and 4(b) and the maximum number of securities subject
to award to any person pursuant to Section 5(c), and the outstanding Stock
Awards will be appropriately adjusted in the class(es) and number of securities
and price per share of Common Stock subject to such outstanding Stock Awards.
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, and
shares of Common Stock subject to the Company's repurchase option may be
repurchased by the Company notwithstanding the fact that the holder of such
stock is still in Continuous Service.

         (c)      CORPORATE TRANSACTION. In the event of a Corporate
Transaction, any surviving corporation or acquiring corporation may assume or
continue any or all Stock Awards outstanding under the Plan or may substitute
similar stock awards for Stock Awards outstanding under the Plan (it being
understood that similar stock awards include, but are not limited to, awards to
acquire the same consideration paid to the stockholders or the Company, as the
case may be, pursuant to the Corporate Transaction), and any reacquisition or
repurchase rights held by the Company in respect of Common Stock issued pursuant
to Stock Awards may be assigned by the Company to the successor of the Company
(or the successor's parent company), if any, in connection with such Corporate
Transaction. In the event that any surviving corporation or acquiring
corporation does not assume or continue any or all such outstanding Stock Awards
or substitute similar stock awards for such outstanding Stock Awards, then with
respect to Stock Awards that have been not assumed, continued or substituted and
that are held by Participants whose Continuous Service has not terminated prior
to the effective time of the Corporate Transaction, the vesting of such Stock
Awards (and, if applicable, the time at which such Stock Awards 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), the Stock Awards shall terminate
if not exercised (if applicable) at or prior to such effective time, and any
reacquisition or

                                      16.

<PAGE>

repurchase rights held by the Company with respect to such Stock Awards held by
Participants whose Continuous Service has not terminated shall (contingent upon
the effectiveness of the Corporate Transaction) lapse. With respect to any other
Stock Awards outstanding under the Plan that have not been assumed, continued or
substituted, the vesting of such Stock Awards (and, if applicable, the time at
which such Stock Award may be exercised) shall not be accelerated, unless
otherwise provided in a written agreement between the Company or any Affiliate
and the holder of such Stock Award, and such Stock Awards shall terminate if not
exercised (if applicable) prior to the effective time of the Corporate
Transaction.

         (d)      CHANGE IN CONTROL.

                  (i)      If a Change in Control occurs and on, or within
thirteen (13) months after, the effective time of such Change in Control the
Continuous Service of a Participant terminates due to an involuntary termination
(not including death or Disability) without Cause or due to a voluntary
termination with Good Reason, then, as of the date of termination of Continuous
Service, the vesting and exercisability of such Participant's Stock Awards shall
be accelerated in full. In addition, a Stock Award held by any Participant whose
Continuous Service has not terminated prior to the effective time of a Change in
Control may be subject to additional acceleration of vesting and exercisability
upon or after such event as may be provided in the Stock Award Agreement for
such Stock Award or as may be provided in any other written agreement between
the Company or any Affiliate and the Participant.

                  (ii)     If any payment or benefit a Participant would receive
hereunder pursuant to a Change in Control from the Company or otherwise
("Payment") would (i) constitute a "parachute payment" within the meaning of
Section 280G of the Code, and (ii) but for this sentence, be subject to the
excise tax imposed by Section 4999 of the Code (the "Excise Tax"), then such
Payment shall be equal to the Reduced Amount. The "Reduced Amount" shall be
either (x) the largest portion of the Payment that would result in no portion of
the Payment being subject to the Excise Tax or (y) the largest portion, up to
and including the total, of the Payment, whichever amount, after taking into
account all applicable federal, state and local employment taxes, income taxes,
and the Excise Tax (all computed at the highest applicable marginal rate),
results in such Participant's receipt, on an after-tax basis, of the greater
amount, notwithstanding that all or some portion of the Payment may be subject
to the Excise Tax. If a reduction in payments or benefits hereunder is necessary
so that the Payment equals the Reduced Amount, reduction shall occur in the
following order unless the Participant elects in writing a different order
(provided, however, that such election shall be subject to Company approval if
made on or after the date on which the event that triggers the Payment occurs):
(1) reduction in the acceleration of vesting of Stock Awards, and (2) forfeiture
of Stock Awards. In the event that acceleration of vesting of Stock Awards is to
be reduced, such acceleration of vesting shall be cancelled in the reverse order
of the date of grant of such Participant's Awards (i.e., vesting on the earliest
granted Award cancelled last) unless such Participant elects in writing a
different order for cancellation. In the event that Stock Awards are to be
forfeited, such forfeiture shall occur in the reverse order of the date of grant
of such Participant's Stock Awards (i.e., earliest granted Award forfeited last)
unless such Participant elects in writing a different order for forfeiture.

                                      17.

<PAGE>

         The accounting firm engaged by the Company for general audit purposes
as of the day prior to the effective date of the Change in Control shall perform
the foregoing calculations. If the accounting firm so engaged by the Company is
serving as accountant or auditor for the individual, entity or group effecting
the Change in Control, the Company shall appoint a nationally recognized
accounting firm to make the determinations required hereunder. The Company shall
bear all expenses with respect to the determinations by such accounting firm
required to be made hereunder.

         The accounting firm engaged to make the determinations hereunder shall
provide its calculations, together with detailed supporting documentation, to
such Participant and the Company within fifteen (15) calendar days after the
date on which such Participant's right to a Payment is triggered (if requested
at that time by such Participant or the Company) or such other time as requested
by such Participant or the Company. If the accounting firm determines that no
Excise Tax is payable with respect to a Payment, either before or after the
application of the Reduced Amount, it shall furnish such Participant and the
Company with an opinion reasonably acceptable to such Participant that no Excise
Tax will be imposed with respect to such Payment. Any good faith determinations
of the accounting firm made hereunder shall be final, binding and conclusive
upon such Participant and the Company.

12.      AMENDMENT OF THE PLAN AND STOCK AWARDS.

         (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(a) relating
to Capitalization Adjustments, 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 Section 422 of the Code.

         (b)      STOCKHOLDER APPROVAL. The Board, in its sole discretion, may
submit any other amendment to the Plan for stockholder approval, including, but
not limited to, amendments to the Plan intended to satisfy the requirements of
Section 162(m) of the Code and the regulations thereunder regarding the
exclusion of performance-based compensation from the limit on corporate
deductibility of compensation paid to Covered Employees.

         (c)      CONTEMPLATED AMENDMENTS. It is expressly contemplated that the
Board may amend the Plan in any respect the Board deems necessary or advisable
to provide eligible Employees with the maximum benefits provided or to be
provided under the provisions of the Code and the regulations promulgated
thereunder relating to Incentive Stock Options and/or to bring the Plan and/or
Incentive Stock Options granted under it into compliance therewith.

         (d)      NO IMPAIRMENT OF RIGHTS. Rights under any Stock Award 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 Participant and (ii) the
Participant consents in writing.

         (e)      AMENDMENT OF STOCK AWARDS. The Board at any time, and from
time to time, may amend the terms of any one or more Stock Awards; provided,
however, that the rights under any Stock Award shall not be impaired by any such
amendment unless (i) the Company requests the consent of the Participant and
(ii) the Participant consents in writing.

                                      18.

<PAGE>

13.      TERMINATION OR SUSPENSION OF THE PLAN.

         (a)      PLAN TERM. The Board may suspend or terminate the Plan at any
time. Unless sooner terminated, the Plan shall terminate on the day before the
tenth (10th) anniversary of the date the Plan is adopted by the Board or
approved by the stockholders of the Company, whichever is earlier. No Stock
Awards 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 Stock Award granted while the
Plan is in effect except with the written consent of the Participant.

14.      EFFECTIVE DATE OF PLAN.

         The Plan shall become effective as determined by the Board, but no
Stock Award shall be exercised (or, in the case of a stock bonus, shall be
granted) 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 Colorado shall govern all questions concerning
the construction, validity and interpretation of this Plan, without regard to
such state's conflict of laws rules.

                                      19.
<PAGE>
                                  MYOGEN, INC.
                            STOCK OPTION GRANT NOTICE
                          (2003 EQUITY INCENTIVE PLAN)

MYOGEN, INC. (the "Company"), pursuant to its 2003 EQUITY INCENTIVE PLAN (the
"Plan"), hereby grants to Optionholder an option to purchase the number of
shares of the Company's Common Stock set forth below. This option is subject to
all of the terms and conditions as set forth herein and in the Stock Option
Agreement, the Plan and the Notice of Exercise, all of which are attached hereto
and incorporated herein in their entirety.

                Optionholder:                           ________________
                Date of Grant:                          ________________
                Vesting Commencement Date:              ________________
                Number of Shares Subject to Option:     ________________
                Exercise Price (Per Share):             ________________
                Total Exercise Price:                   ________________
                Expiration Date:                        ________________

TYPE OF GRANT:      [ ] Incentive Stock Option(1)  [ ] Nonstatutory Stock Option

EXERCISE SCHEDULE:  [ ] Same as Vesting Schedule   [ ] Early Exercise Permitted

VESTING SCHEDULE:   [1/4th of the shares vest one year after the Vesting
                    Commencement Date. 1/48th of the shares vest each month
                    thereafter over the next three years.]

PAYMENT:            By one or a combination of the following items (described in
                    the Stock Option Agreement):

                    [ ] By cash or check
                    [ ] Pursuant to a Regulation T Program if the shares are
                        publicly traded
                    [ ] By delivery of already-owned shares if the shares are
                        publicly traded
                    [ ] By deferred payment

ADDITIONAL TERMS/ACKNOWLEDGEMENTS: The undersigned Optionholder acknowledges
receipt of, and understands and agrees to, this Stock Option Grant Notice, the
Stock Option Agreement and the Plan. Optionholder further acknowledges that as
of the Date of Grant, this Stock Option Grant Notice, the Stock Option Agreement
and the Plan set forth the entire understanding between Optionholder and the
Company regarding the acquisition of stock in the Company and supersede all
prior oral and written agreements on that subject with the exception of (i)
options previously granted and delivered to Optionholder under the Plan, and
(ii) the following agreements only:

         OTHER AGREEMENTS:                    __________________________________
                                              __________________________________

MYOGEN, INC.                                  OPTIONHOLDER:

By: _________________________                 __________________________________
           Signature                                       Signature

Title: ______________________                 Date: ____________________________

Date: _______________________

ATTACHMENTS: Stock Option Agreement, 2003 Equity Incentive Plan and Notice of
Exercise

-----------------------
(1)      If this is an Incentive Stock Option, it (plus other outstanding
Incentive Stock Options) cannot be first exercisable for more than $100,000 in
value (measured by exercise price) in any calendar year. Any excess over
$100,000 is a Nonstatutory Stock Option.

<PAGE>

                                  ATTACHMENT I

                             STOCK OPTION AGREEMENT

                            (INTENTIONALLY OMITTED)
<PAGE>

                                  ATTACHMENT II

                 2003 AMENDED AND RESTATED EQUITY INCENTIVE PLAN

                            (INTENTIONALLY OMITTED)
<PAGE>

                                 ATTACHMENT III

                               NOTICE OF EXERCISE

                            (INTENTIONALLY OMITTED)
<PAGE>
                                  MYOGEN, INC.
                           2003 EQUITY INCENTIVE PLAN

                             STOCK OPTION AGREEMENT
              (INCENTIVE STOCK OPTION OR NONSTATUTORY STOCK OPTION)


         Pursuant to your Stock Option Grant Notice ("Grant Notice") and this
Stock Option Agreement, MYOGEN, Inc. (the "Company") has granted you an option
under its 2003 EQUITY INCENTIVE PLAN (the "Plan") to purchase the number of
shares of the Company's Common Stock indicated in your Grant Notice at the
exercise price indicated in your Grant Notice. Defined terms not explicitly
defined in this Stock Option Agreement but defined in the Plan shall have the
same definitions as in the Plan.

         The details of your option are as follows:

         1. VESTING. Subject to the limitations contained herein, your option
will vest as provided in your Grant Notice, provided that vesting will cease
upon the termination of your Continuous Service.

         2. NUMBER OF SHARES AND EXERCISE PRICE. The number of shares of Common
Stock subject to your option and your exercise price per share referenced in
your Grant Notice may be adjusted from time to time for Capitalization
Adjustments.

         3. EXERCISE.

            (A) You may exercise the vested portion of your option (and the
unvested portion of your option if your Grant Notice so permits) during its term
by delivering a Notice of Exercise (in a form designated by the Company)
together with the exercise price to the Secretary of the Company, or to such
other person as the Company may designate, during regular business hours,
together with such additional documents as the Company may then require.

            (B) By exercising your option you agree that, as a condition to any
exercise of your option, the Company may require you to enter into an
arrangement providing for the payment by you to the Company of any tax
withholding obligation of the Company arising by reason of (1) the exercise of
your option, (2) the lapse of any substantial risk of forfeiture to which the
shares of Common Stock are subject at the time of exercise, or (3) the
disposition of shares of Common Stock acquired upon such exercise.

            (C) If your option is an Incentive Stock Option, by exercising your
option you agree that you will notify the Company in writing within fifteen (15)
days after the date of any disposition of any of the shares of the Common Stock
issued upon exercise of your option that occurs within two (2) years after the
date of your option grant or within one (1) year after such shares of Common
Stock are transferred to you upon exercise of your option.

         4. EXERCISE PRIOR TO VESTING ("EARLY EXERCISE"). If permitted in your
Grant Notice (i.e., the "Exercise Schedule" indicates that "Early Exercise" of
your option is permitted)



                                       1.
<PAGE>


and subject to the provisions of your option, you may elect at any time that is
both (i) during the period of your Continuous Service and (ii) during the term
of your option, to exercise all or part of your option, including the nonvested
portion of your option; provided, however, that:

            (a) a partial exercise of your option shall be deemed to cover first
vested shares of Common Stock and then the earliest vesting installment of
unvested shares of Common Stock;

            (b) any shares of Common Stock so purchased from installments that
have not vested as of the date of exercise shall be subject to the purchase
option in favor of the Company as described in the Company's form of Early
Exercise Stock Purchase Agreement; and

            (c) you shall enter into the Company's form of Early Exercise Stock
Purchase Agreement with a vesting schedule that will result in the same vesting
as if no early exercise had occurred.

         5. ISO EXERCISE LIMITATION.

            (A) The aggregate Fair Market Value of the shares of Common Stock
with respect to which you may exercise your option for the first time during any
calendar year, when added to the aggregate Fair Market Value of the shares of
Common Stock subject to any other options designated as Incentive Stock Options
and granted to you under any stock option plan of the Company or an Affiliate
prior to the Date of Grant with respect to which such options are exercisable
for the first time during the same calendar year, shall not exceed $100,000 (the
"ISO Exercise Limitation") unless applicable law requires that your option be
exercisable sooner. For purposes of this Section 5, your options designated as
Incentive Stock Options shall be taken into account in the order in which they
were granted to you, and the Fair Market Value of shares of Common Stock shall
be determined as of the time the option with respect to such shares of Common
Stock is granted. If Section 422 of the Code is amended to provide for a
different limitation from that set forth in this provision, the ISO Exercise
Limitation shall be deemed amended effective as of the date required or
permitted by such amendment to the Code.

            (B) [OPTIONAL: NOTWITHSTANDING THE PROVISIONS OF SECTION 5(a), IF
THE ISO EXERCISE LIMITATION WOULD PREVENT YOU FROM EXERCISING YOUR OPTION AS TO
VESTED SHARES, THEN THE ISO EXERCISE LIMITATION SHALL TERMINATE AS TO SUCH
VESTED SHARES AS SUCH SHARES VEST, AND YOU MAY EXERCISE YOUR OPTION AS TO SUCH
VESTED SHARES. UPON SUCH TERMINATION OF THE ISO EXERCISE LIMITATION, YOUR OPTION
SHALL BE DEEMED A NONSTATUTORY STOCK OPTION TO THE EXTENT OF THE NUMBER OF
VESTED SHARES OF COMMON STOCK SUBJECT TO YOUR OPTION THAT EXCEED THE ISO
EXERCISE LIMITATION.]

            (C) The ISO Exercise Limitation shall terminate, and you may fully
exercise your option, as to all vested shares of Common Stock subject to your
option, upon the earlier of the following events:

                (I) the date of termination of your Continuous Service;


                                       2.
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                (II) the day immediately prior to the effective date of a
Corporate Transaction; or

                (III) the day that is ten (10) days prior to the Expiration Date
of your option.

Upon such termination of the ISO Exercise Limitation, your option shall be
deemed a Nonstatutory Stock Option to the extent of the number of shares of
Common Stock subject to your option that exceed the ISO Exercise Limitation.

         6. METHOD OF PAYMENT. Payment of the exercise price is due in full upon
exercise of all or any part of your option. You may elect to make payment of the
exercise price in cash or by check or in any other manner PERMITTED BY YOUR
GRANT NOTICE, which may include one or more of the following:

            (A) In the Company's sole discretion at the time your option is
exercised and provided that at the time of exercise the Common Stock is publicly
traded and quoted regularly in The Wall Street Journal, 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.

            (B) Provided that at the time of exercise the Common Stock is
publicly traded and quoted regularly in The Wall Street Journal, by delivery of
already-owned shares of Common Stock either that you have held for the period
required to avoid a charge to the Company's reported earnings (generally six (6)
months) or that you did not acquire, directly or indirectly from the Company,
that are owned free and clear of any liens, claims, encumbrances or security
interests, and that are valued at Fair Market Value on the date of exercise.
"Delivery" for these purposes, in the sole discretion of the Company at the time
you exercise your option, shall include delivery to the Company of your
attestation of ownership of such shares of Common Stock in a form approved by
the Company. Notwithstanding the foregoing, you may not exercise your option by
tender to the Company of Common Stock to the extent such tender would violate
the provisions of any law, regulation or agreement restricting the redemption of
the Company's stock.

            (C) [OPTIONAL]Pursuant to the following deferred payment alternative
(provided that this alternative shall not be available for executive officers or
Directors of the Company, notwithstanding any Stock Option Grant Notice to the
contrary):

                (I) Not less than one hundred percent (100%) of the aggregate
exercise price, plus accrued interest, shall be due four (4) years from date of
exercise or, at the Company's election, upon termination of your Continuous
Service.

                (II) Interest shall be compounded at least annually and shall be
charged at the minimum rate of interest necessary to avoid (1) the treatment as
interest, under any applicable provisions of the Code, of any amounts other than
amounts stated to be interest under


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the deferred payment arrangement and (2) the treatment of the Option as a
variable award for financial accounting purposes.

                (III) At any time that the Company is incorporated in Delaware,
payment of the Common Stock's "par value," as defined in the Delaware General
Corporation Law, shall be made in cash and not by deferred payment.

                (IV) In order to elect the deferred payment alternative, you
must, as a part of your written notice of exercise, give notice of the election
of this payment alternative and, in order to secure the payment of the deferred
exercise price to the Company hereunder, if the Company so requests, you must
tender to the Company a promissory note and a pledge agreement covering the
purchased shares of Common Stock, both in form and substance satisfactory to the
Company, or such other or additional documentation as the Company may request.

         7. WHOLE SHARES. You may exercise your option only for whole shares of
Common Stock.

         8. SECURITIES LAW COMPLIANCE. Notwithstanding anything to the contrary
contained herein, you may not exercise your option unless the shares of Common
Stock issuable upon such exercise are then registered under the Securities Act
or, if such shares of Common Stock are not then so registered, the Company has
determined that such exercise and issuance would be exempt from the registration
requirements of the Securities Act. The exercise of your option also must comply
with other applicable laws and regulations governing your option, and you may
not exercise your option if the Company determines that such exercise would not
be in material compliance with such laws and regulations.

         9. TERM. You may not exercise your option before the commencement or
after the expiration of its term. The term of your option commences on the Date
of Grant and expires upon the earliest of the following:

            (A) three (3) months after the termination of your Continuous
Service for any reason other than your Disability or death, provided that if
during any part of such three (3) month period your option is not exercisable
solely because of the condition set forth in Section 8, your option shall not
expire until the earlier of the Expiration Date or until it shall have been
exercisable for an aggregate period of three (3) months after the termination of
your Continuous Service;

            (B) twelve (12) months after the termination of your Continuous
Service due to your Disability;

            (C) eighteen (12) months after your death if you die either during
your Continuous Service or within three (3) months after your Continuous Service
terminates;

            (D) the Expiration Date indicated in your Grant Notice; or

            (E) the day before the tenth (10th) anniversary of the Date of
Grant.


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            (F) If your option is an Incentive Stock Option, note that to obtain
the federal income tax advantages associated with an Incentive Stock Option, the
Code requires that at all times beginning on the date of grant of your option
and ending on the day three (3) months before the date of your option's
exercise, you must be an employee of the Company or an Affiliate, except in the
event of your death or Disability. The Company has provided for extended
exercisability of your option under certain circumstances for your benefit but
cannot guarantee that your option will necessarily be treated as an Incentive
Stock Option if you continue to provide services to the Company or an Affiliate
as a Consultant or Director after your employment terminates or if you otherwise
exercise your option more than three (3) months after the date your employment
with the Company or an Affiliate terminates.

         10. TRANSFERABILITY. Your option is not transferable, except by will or
by the laws of descent and distribution, and is exercisable during your life
only by you. Notwithstanding the foregoing, by delivering written notice to the
Company, in a form satisfactory to the Company, you may designate a third party
who, in the event of your death, shall thereafter be entitled to exercise your
option.

         11. OPTION NOT A SERVICE CONTRACT. Your option is not an employment or
service contract, and nothing in your option shall be deemed to create in any
way whatsoever any obligation on your part to continue in the employ of the
Company or an Affiliate, or of the Company or an Affiliate to continue your
employment. In addition, nothing in your option shall obligate the Company or an
Affiliate, their respective stockholders, Boards of Directors, Officers or
Employees to continue any relationship that you might have as a Director or
Consultant for the Company or an Affiliate.

         12. WITHHOLDING OBLIGATIONS.

             (A) At the time you exercise your option, in whole or in part, or
at any time thereafter as requested by the Company, you hereby authorize
withholding from payroll and any other amounts payable to you, and otherwise
agree to make adequate provision for (including by means of a "cashless
exercise" pursuant to a program developed under Regulation T as promulgated by
the Federal Reserve Board to the extent permitted by the Company), any sums
required to satisfy the federal, state, local and foreign tax withholding
obligations of the Company or an Affiliate, if any, which arise in connection
with the exercise of your option.

             (B) Upon your request and subject to approval by the Company, in
its sole discretion, and compliance with any applicable legal conditions or
restrictions, the Company may withhold from fully vested shares of Common Stock
otherwise issuable to you upon the exercise of your option a number of whole
shares of Common Stock having a Fair Market Value, determined by the Company as
of the date of exercise, not in excess of the minimum amount of tax required to
be withheld by law (or such lower amount as may be necessary to avoid variable
award accounting). If the date of determination of any tax withholding
obligation is deferred to a date later than the date of exercise of your option,
share withholding pursuant to the preceding sentence shall not be permitted
unless you make a proper and timely election under Section 83(b) of the Code,
covering the aggregate number of shares of Common Stock acquired upon such
exercise with respect to which such determination is otherwise deferred, to
accelerate the determination of such tax withholding obligation to the date of
exercise of your option.


                                       5.
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Notwithstanding the filing of such election, shares of Common Stock shall be
withheld solely from fully vested shares of Common Stock determined as of the
date of exercise of your option that are otherwise issuable to you upon such
exercise. Any adverse consequences to you arising in connection with such share
withholding procedure shall be your sole responsibility.

             (C) You may not exercise your option unless the tax withholding
obligations of the Company and/or any Affiliate are satisfied. Accordingly, you
may not be able to exercise your option when desired even though your option is
vested, and the Company shall have no obligation to issue a certificate for such
shares of Common Stock or release such shares of Common Stock from any escrow
provided for herein unless such obligations are satisfied.

         13. NOTICES. Any notices provided for in your option or the Plan shall
be given in writing and shall be deemed effectively given upon receipt or, in
the case of notices delivered by mail by the Company to you, five (5) days after
deposit in the United States mail, postage prepaid, addressed to you at the last
address you provided to the Company.

         14. GOVERNING PLAN DOCUMENT. Your option is subject to all the
provisions of the Plan, the provisions of which are hereby made a part of your
option, and is further subject to all interpretations, amendments, rules and
regulations, which may from time to time be promulgated and adopted pursuant to
the Plan. In the event of any conflict between the provisions of your option and
those of the Plan, the provisions of the Plan shall control.



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