Document:

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                                                                    EXHIBIT 10.2

                           INDEMNIFICATION AGREEMENT

         THIS AGREEMENT is made and entered into as of the 22nd day of May,
2002, by and between LUMINEX CORPORATION, a Delaware corporation (the
"Company"), and the undersigned (the "Indemnitee").

                                    RECITALS

         WHEREAS, it is essential to the Company that it attract and retain as
directors and officers the most capable persons available; and

         WHEREAS, both the Company and Indemnitee recognize the increased risk
of litigation and other claims being asserted against directors and officers of
public companies in the current environment; and

         WHEREAS, the Indemnitee currently is serving as a director or officer
of the Company, and the Company desires that the Indemnitee continue to serve in
such capacity. The Indemnitee is willing to continue to serve in such capacity
if the Indemnitee is adequately protected against the risks associated with such
service; and

         WHEREAS, Section 145 of the General Corporation Law of the State of
Delaware (the "DGCL"), under which law the Company is organized, empowers a
corporation to indemnify a person serving as a director or officer of the
Company and a person who serves at the request of the company as a director,
officer, employee or agent of another corporation, partnership, joint venture,
trust, or other enterprise, and Section 145 of the DGCL and the Certificate of
Incorporation of the Company specify that the indemnification set forth in
Section 145 and in the Certificate of Incorporation, respectively, shall not be
deemed exclusive of any other rights to which those seeking indemnification may
be entitled under any law (common or statutory), agreement, vote of stockholders
or disinterested Directors or otherwise; and

         WHEREAS, the Company and the Indemnitee have concluded that the
indemnities available under the Company's Certificate of Incorporation, Bylaws
and any insurance now or hereafter in effect need to be supplemented to more
fully protect the Indemnitee against the risks associated with the Indemnitee's
service to the Company; and

         WHEREAS, in recognition of Indemnitee's need for additional protection
against personal liability in order to enhance Indemnitee's continued service to
the Company in an effective manner, and in order to induce Indemnitee to
continue to provide services to the Company as a director or officer thereof,
the Company wishes to provide in this Agreement for the indemnification of
Indemnitee to the fullest extent permitted by law and as set forth in this
Agreement.

         NOW THEREFORE, in consideration of the foregoing, the covenants
contained herein and Indemnitee's continued service to the Company, the Company
and Indemnitee, intending to be legally bound, hereby agree as follows:

         Section 1.     Definitions. The following terms, as used herein, shall
have the following respective meanings:

         "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting

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securities, by contract or otherwise; and the terms "controlling" and
"controlled" have meanings relative to the foregoing.

         "Change in Control" shall be deemed to have taken place if: (i) any
person or entity, including a "group" as defined in Section 13(d)(3) of the
Securities Exchange Act of 1934, other than the Company or a wholly-owned
subsidiary thereof or any employee benefit plan of the Company or any of its
subsidiaries, becomes the beneficial owner of the Company securities having 50%
or more of the combined voting power of the then outstanding securities of the
Company that may be cast for the election of directors of the Company (other
than as a result of an issuance of securities initiated by Company in the
ordinary course of business); or (ii) as the result of, or in connection with,
any cash tender or exchange offer, merger or other business combination, sale of
substantially all of the assets or contested election, or any combination of the
foregoing transactions less than a majority of the combined voting power of the
then-outstanding securities of the Company or any successor corporation or
entity entitled to vote generally in the election of the directors of the
Company or such other corporation or entity after such transaction is held in
the aggregate by the holders of the Company securities entitled to vote
generally in the election of directors of the Company immediately prior to such
transaction; or (iii) during any period of two consecutive years, individuals
who at the beginning of any such period constitute the Board of Directors of the
Company cease for any reason to constitute at least a majority thereof, unless
the election, or the nomination for election by the Company's stockholders, of
each director of the Company first elected during such period was approved by a
vote of at least two-thirds of the directors of the Company then still in office
who were directors of the Company at the beginning of any such period.

         "Claim" means (a) any threatened, pending or completed action, suit,
proceeding or arbitration or other alternative dispute resolution mechanism, or
(b) any inquiry, hearing or investigation, whether conducted by the Company or
any other Person, that Indemnitee in good faith believes might lead to the
institution of any such action, suit, proceeding or arbitration or other
alternative dispute resolution mechanism, in each case whether civil, criminal,
administrative or other (whether or not the claims or allegations therein are
groundless, false or fraudulent) and includes, without limitation, those brought
by or in the name of the Company or any director or officer of the Company.

         "Company Agent" means any director, officer, partner, employee, agent,
trustee or fiduciary of the Company, any Subsidiary or any Other Enterprise.

         "Covered Event" means any event or occurrence on or after the date of
this Agreement related to the fact that Indemnitee is or was a Company Agent or
related to anything done or not done by Indemnitee in any such capacity, and
includes, without limitation, any such event or occurrence (a) arising from
performance of the responsibilities, obligations or duties imposed by ERISA or
any similar applicable provisions of state or common law, or (b) arising from
any merger, consolidation or other business combination involving the Company,
any Subsidiary or any Other Enterprise, including without limitation any sale or
other transfer of all or substantially all of the business or assets of the
Company, any Subsidiary or any Other Enterprise; provided, however, that in any
such case, Indemnitee acted in good faith and in a manner which such Indemnitee
reasonably believed to be in or not opposed to the best interests of the
Company, and in the case of a criminal proceeding, in addition had no reasonable
cause to believe that such Indemnitee's conduct was unlawful.

         "D&O Insurance" means the directors' and officers' liability insurance
maintained by or for the benefit of the Company, its directors or officers and
any replacement or substitute policies.

         "Determination" means a determination made by (a) a majority vote of
Disinterested Directors even if less than a quorum; (b) Independent Legal
Counsel, in a written opinion addressed to the

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Company and Indemnitee; (c) the stockholders of the Company; or (d) a decision
by a court of competent jurisdiction not subject to further appeal.

         "Disinterested Director" shall be a director of the Company who is not
or was not a party to the Claim giving rise to the subject matter of a
Determination.

         "Expenses" includes attorneys' fees and all other costs, travel
expenses, fees of experts, transcript costs, filing fees, witness fees,
telephone charges, postage, copying costs, delivery service fees and other
expenses and obligations of any nature whatsoever paid or incurred in connection
with investigating, prosecuting or defending, being a witness in or
participating in (including on appeal), or preparing to prosecute or defend, be
a witness in or participate in any Claim, for which Indemnitee is or becomes
legally obligated to pay.

         "Independent Legal Counsel" shall mean a law firm or a member of a law
firm that (a) neither is nor in the past five years has been retained to
represent in any material matter the Company, any Subsidiary, Indemnitee or any
other party to the Claim, (b) under applicable standards of professional conduct
then prevailing would not have a conflict of interest in representing either the
Company or Indemnitee in an action to determine Indemnitee's rights to
indemnification under this Agreement and (c) is reasonably acceptable to the
Company and Indemnitee.

         "Loss" means any amount which Indemnitee is legally obligated to pay as
a result of any Claim, including, without limitation (a) all judgments,
penalties and fines, and amounts paid or to be paid in settlement, (b) all
interest, assessments and other charges paid or payable in connection therewith
and (c) any federal, state, local or foreign taxes imposed (net of the value to
Indemnitee of any tax benefits resulting from tax deductions or otherwise as a
result of the actual or deemed receipt of any payments under this Agreement,
including the creation of the Trust).

         "Other Enterprise" means any corporation (other than the Company or any
Subsidiary), partnership, joint venture, association, employee benefit plan,
trust or other enterprise or organization to which Indemnitee renders service at
the request of the Company or any Subsidiary.

         "Parent" shall have the meaning set forth in the regulations of the
Securities and Exchange Commission under the Securities Act of 1933, as amended;
provided the term "Parent" shall not include the board of directors of a
corporation in its capacity as a board of directors, and provided further that
if the other party to any transaction referred to in Section 12.1.2 has no
Parent as so defined above, "Parent" shall mean such other party.

         "Person" means any individual, corporation, partnership, joint venture,
association, joint-stock company, trust, unincorporated organization or
government (or any subdivision, department, commission or agency thereof), and
includes without limitation any "person", as such term is used in Sections 13(d)
and 14(d) of the Securities Exchange Act of 1934, as amended.

         "Potential Change in Control" shall be deemed to have occurred if (a)
the Company enters into an agreement or arrangement the consummation of which
would result in the occurrence of a Change in Control, (b) any Person (including
the Company) publicly announces an intention to take or to consider taking
actions which if consummated would constitute a Change in Control or (c) the
Board of Directors of the Company adopts a resolution to the effect that, for
purposes of this Agreement, a Potential Change in Control has occurred.
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         "Subsidiary" means any corporation of which more than 50% of the
outstanding stock having ordinary voting power to elect a majority of the board
of directors of such corporation is now or hereafter owned, directly or
indirectly, by the Company.

         "Trust" has the meaning set forth in Section 9.2.

         "Voting Securities" means any securities of the Company which vote
generally in the election of directors.

         Section 2.     Indemnification

         2.1.     General Indemnity Obligation.

                  2.1.1. Subject to the remaining provisions of this Agreement,
the Company hereby indemnifies and holds Indemnitee harmless for any Losses or
Expenses arising from any Claims relating to (or arising in whole or in part out
of) any Covered Event, including without limitation, any Claim the basis of
which is any actual or alleged breach of duty, neglect, error, misstatement,
misleading statement, omission or other act done or attempted by Indemnitee in
the capacity as a Company Agent, whether or not Indemnitee is acting or serving
in such capacity at the date of this Agreement, at the time liability is
incurred or at the time the Claim is initiated.

                  2.1.2. The obligations of the Company under this Agreement
shall apply to the fullest extent authorized or permitted by the provisions of
applicable law, as presently in effect or as changed after the date of this
Agreement, whether by statute or judicial decision (but, in the case of any
subsequent change, only to the extent that such change permits the Company to
provide broader indemnification than permitted prior to giving effect thereto).

                  2.1.3. Indemnitee shall not be entitled to indemnification
pursuant to this Agreement in connection with any Claim initiated by Indemnitee
against the Company or any director or officer of the Company, unless the
Company has joined in or consented to the initiation of such Claim; provided,
the provisions of this Section 2.1.3 shall not apply (i) following a Change in
Control to Claims seeking enforcement of this Agreement, the Certificate of
Incorporation or Bylaws of the Company or any other agreement now or hereafter
in effect relating to indemnification for Covered Events or (ii) absent a Change
in Control, to Claims seeking enforcement of this Agreement, the Certificate of
Incorporation or Bylaws of the Company or any other agreement now or hereafter
in effect relating to indemnification for Covered Events, but only if the
Indemnitee is ultimately determined to be entitled to indemnification.

                  2.1.4. If Indemnitee is entitled under any provision of this
Agreement to indemnification by the Company for some or a portion of the Losses
or Expenses paid with respect to a Claim but not, however, for the total amount
thereof, the Company shall nevertheless indemnify and hold Indemnitee harmless
against the portion thereof to which Indemnitee is entitled.

                  2.1.5. Notwithstanding any other provision of this Agreement,
to the extent that Indemnitee has been successful on the merits or otherwise in
defense of any or all Claims relating to (or arising in whole or in part out of)
a Covered Event or in defense of any issue or matter therein, including
dismissal without prejudice, the Company shall indemnify and hold Indemnitee
harmless against all Expenses incurred in connection therewith.

         2.2.     Indemnification for Serving as Witness and Certain Other
Claims. Notwithstanding any other provision of this Agreement, the Company
hereby indemnifies and holds Indemnitee harmless for all Expenses in connection
with (a) the preparation to serve or service as a witness in any Claim in which
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Indemnitee is not a party, if such actual or proposed service as a witness arose
by reason of Indemnitee having served as a Company Agent on or after the date of
this Agreement and (b) any Claim initiated by Indemnitee on or after the date of
this Agreement (i) for recovery under any D&O Insurance; (ii) following a Change
in Control, for enforcement of the indemnification obligations of the Company
under this Agreement, the Certificate of Incorporation or Bylaws of the Company
or any other agreement now or hereafter in effect relating to indemnification
for Covered Events, regardless of whether Indemnitee ultimately is determined to
be entitled to such insurance recovery or indemnification, as the case may be;
or (iii) absent a Change in Control, for enforcement of this Agreement, the
Certificate of Incorporation or Bylaws of the Company or any other agreement now
or hereafter in effect relating to indemnification for Covered Events, but only
if the Indemnitee is ultimately determined to be entitled to indemnification.

         Section 3.     Limitation on Indemnification.

         3.1.     Coverage Limitations. No indemnification is available pursuant
to the provisions of this Agreement:

                  3.1.1. If such indemnification is not lawful;

                  3.1.2. If Indemnitee's conduct giving rise to the Claim with
respect to which indemnification is requested was knowingly fraudulent, a
knowing violation of law, deliberately dishonest or in bad faith or constituted
willful misconduct;

                  3.1.3. In respect of any Claim based upon or attributable to
Indemnitee gaining in fact any personal profit or advantage to which Indemnitee
was not legally entitled;

                  3.1.4. In respect of any Claim based upon or in connection
with a proceeding by or in the right of the Company in which Indemnitee was
adjudged liable to the Company unless and only to the extent that the Court of
Chancery of Delaware shall determine upon application that, despite the
adjudication of such liability but in view of all circumstances of the case, the
Indemnitee is fairly and reasonably entitled to indemnity for such expenses
(including attorney's fees) which the Court of Chancery of Delaware shall deem
proper; or

                  3.1.5. In respect of any Claim for an accounting of profits
made from the purchase or sale by Indemnitee of securities of the Company within
the meaning of Section 16(b) of the Securities Exchange Act of 1934, as amended.

                  3.1.6. No Duplication of Payments. The Company shall not be
liable under this Agreement to make any payment otherwise due and payable to the
extent Indemnitee has otherwise actually received payment (whether under the
Certificate of Incorporation or the Bylaws of the Company, the D&O Insurance or
otherwise) of any amounts otherwise due and payable under this Agreement.

         Section 4.     Payments and Determinations.

         4.1. Advancement and Reimbursement of Expenses. If requested by
Indemnitee, the Company shall advance to Indemnitee, no later than five business
days following any such request, any and all Expenses for which indemnification
is available under Section 2. In order to obtain such advancement or
reimbursement, the Indemnitee must also furnish to the Company a written
affirmation of his good faith belief that he has conducted himself in good faith
and that he reasonably believed that: (1) in the case of conduct in his official
capacity with the corporation, that his conduct was in its best interest; (2) in
all other cases, that his conduct was at least not opposed to its best
interests; and (3) in the case of any criminal proceeding, he had no reasonable
cause to believe his conduct was unlawful. In addition,

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Indemnitee must furnish to the Company a written undertaking, executed
personally or on his behalf, to repay the advance if it is ultimately determined
that he is not entitled to indemnification. Upon any Determination that
Indemnitee is not permitted to be indemnified for any Expenses so advanced,
Indemnitee hereby agrees to reimburse the Company (or, as appropriate, any Trust
established pursuant to Section 9.2) for all such amounts previously paid. Such
obligation of reimbursement shall be unsecured and no interest shall be charged
thereon.

         4.2.     Payment and Determination Procedures.

                  4.2.1. To obtain indemnification under this Agreement,
Indemnitee shall submit to the Company a written request, together with such
documentation and information as is reasonably available to Indemnitee and is
reasonably necessary to determine whether and to what extent Indemnitee is
entitled to indemnification. The Secretary of the Company shall, promptly upon
receipt of such a request for indemnification, advise the Board of Directors in
writing that Indemnitee has requested indemnification.

                  4.2.2. Any such indemnification of expenses shall be made
promptly, and in any event within 60 days after receipt by the Company of the
written request of the Indemnitee, unless with respect to requests submitted
pursuant to this Agreement the Company makes a Determination within the 60 day
period that the Indemnitee did not meet the applicable standard of conduct as
set forth in this Agreement. Such determination shall be made in the specific
case (a) if a Change in Control shall have occurred, as provided in Section 9.1;
and (b) if a Change in Control shall not have occurred, by (i) the Board of
Directors by a majority vote of Disinterested Directors, (ii) Independent Legal
Counsel, if either (A) there are no Disinterested Directors or (B) a majority
vote of Disinterested Directors otherwise so directs or (iii) the stockholders
of the Company (if submitted by the Board of Directors) but shares of stock
owned by or voted under the control of any Indemnitee who is at the time party
to the proceeding may not be voted.

                  4.2.3. If no Determination is made within 60 days after
receipt by the Company of a request for indemnification by Indemnitee pursuant
to Section 4.2.1, a Determination shall be deemed to have been made that
Indemnitee is entitled to the requested indemnification (and the Company shall
promptly pay the related Losses and Expenses), except where such indemnification
is not lawful; provided, however, that (a) such 60-day period may be extended
for a reasonable time, not to exceed an additional 30 days, if the Person or
Persons making the Determination in good faith require such additional time for
obtaining or evaluating the documentation and information relating thereto; and
(b) the foregoing provisions of this Section 4.2.3 shall not apply (i) if the
Determination is to be made by the stockholders of the Company and if (A) within
15 days after receipt by the Company of the request by Indemnitee pursuant to
Section 4.2.1 the Board of Directors has resolved to submit such Determination
to the stockholders at an annual meeting of the stockholders to be held within
75 days after such receipt, and such Determination is made at such annual
meeting, or (B) a special meeting of stockholders is called within 15 days after
such receipt for the purpose of making such Determination, such meeting is held
for such purpose within 60 days after having been so called and such
Determination is made at such special meeting, or (ii) if the Determination is
to be made by Independent Legal Counsel.

         Section 5.       D & O Insurance.

         5.1. Current Policies. The Company hereby represents and warrants to
Indemnitee that Exhibit 1 contains a complete and accurate description of the
D&O Insurance and that such insurance is in full force and effect.

         5.2. Continued Coverage. The Company shall maintain, to the extent
practicable, the D&O Insurance for so long as this Agreement remains in effect.
The Company shall cause the D&O Insurance to cover Indemnitee, in accordance
with its terms and at all times such insurance is in effect, to the

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maximum extent of the coverage provided thereby for any director or officer of
the Company.

         5.3. Indemnification. In the event of any reduction in, or cancellation
of, the D&O Insurance (whether voluntary or involuntary on behalf of the
Company), the Company shall, and hereby agrees to, indemnify and hold Indemnitee
harmless against any Losses or Expenses which Indemnitee is or becomes obligated
to pay as a result of the Company's failure to maintain the D&O Insurance in
effect in accordance with the provisions of Section 5.2, to the fullest extent
permitted by applicable law, notwithstanding any provision of the Certificate of
Incorporation or the Bylaws of the Company, or any other agreement now or
hereafter in effect relating to indemnification for Covered Events. The
indemnification available under this Section 5.3 is in addition to all other
obligations of indemnification of the Company under this Agreement and shall be
the only remedy of Indemnitee for a breach by the Company of its obligations set
forth in Section 5.2.

         Section 6. Subrogation. In the event of any payment under this
Agreement to or on behalf of Indemnitee, the Company shall be subrogated to the
extent of such payment to all of the rights of recovery of Indemnitee against
any Person other than the Company or Indemnitee in respect of the Claim giving
rise to such payment. Indemnitee shall execute all papers reasonably required
and shall do everything reasonably necessary to secure such rights, including
the execution of such documents reasonably necessary to enable the Company
effectively to bring suit to enforce such rights.

         Section 7. Notification and Defense of Claims.

         7.1.     Notice by Indemnitee. Indemnitee shall give notice in writing
to the Company as soon as practicable after Indemnitee becomes aware of any
Claim with respect to which indemnification will or could be sought under this
Agreement; provided the failure of Indemnitee to give such notice, or any delay
in giving such notice, shall not relieve the Company of its obligations under
this Agreement except to the extent the Company is actually prejudiced to any
such failure or delay.

         7.2.     Insurance. The Company shall give prompt notice of the
commencement of any Claim relating to Covered Events to the insurers on the D&O
Insurance, if any, in accordance with the procedures set forth in the respective
policies in favor of Indemnitee. The Company shall thereafter take all necessary
action to cause such insurers to pay, on behalf of Indemnitee, all amounts
payable as a result of such Claims in accordance with the terms of such
policies.

         7.3.     Defense.

                  7.3.1. In the event any Claim relating to Covered Events is by
or in the right of the Company, Indemnitee may, at the option of Indemnitee,
either control the defense thereof or accept the defense provided under the D&O
Insurance; provided, however, that Indemnitee may not control the defense if
such decision would jeopardize the coverage provided by the D&O Insurance, if
any, to the Company or the other directors and officers covered thereby, and
also provided that the amounts expended by the Company shall be reimbursed to
the Company by the Indemnitee if the standards and requirements of Section 145
of the Delaware General Corporation Law so require.

                  7.3.2. In the event any Claim relating to Covered Events is
other than by or in the right of the Company, Indemnitee may, at the option of
Indemnitee, either control the defense thereof, require the Company to defend or
accept the defense provided under the D&O Insurance; provided, however, that
Indemnitee may not control the defense or require the Company to defend if such
decision would jeopardize the coverage provided by the D&O Insurance to the
Company or the other directors and officers covered thereby. In the event that
Indemnitee requires the Company to so defend, or in the event that Indemnitee
proceeds under the D&O Insurance but Indemnitee determines that such insurers
under
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the D&O Insurance are unable or unwilling to adequately defend Indemnitee
against any such Claim, the Company shall promptly undertake to defend any such
Claim, at the Company's sole cost and expense, utilizing counsel of Indemnitee's
choice who has been approved by the Company. If appropriate, the Company shall
have the right to participate in the defense of any such Claim.

                  7.3.3. In the event the Company shall fail, as required by any
election by Indemnitee pursuant to Section 7.3.2, timely to defend Indemnitee
against any such Claim, Indemnitee shall have the right to do so, including
without limitation, the right (notwithstanding Section 7.3.4) to make any
settlement thereof, and to recover from the Company, to the extent otherwise
permitted by this Agreement, all Expenses and Losses paid as a result thereof.

                  7.3.4. The Company shall have no obligation under this
Agreement with respect to any amounts paid or to be paid in settlement of any
Claim without the express prior written consent of the Company to any related
settlement. In no event shall the Company authorize any settlement imposing any
liability or other obligations on Indemnitee without the express prior written
consent of Indemnitee. Neither the Company nor Indemnitee shall unreasonably
withhold consent to any proposed settlement.

         Section 8.     Determinations and Related Matters.

         8.1.     Presumptions.

                  8.1.1. If a Change in Control shall have occurred, Indemnitee
shall be entitled to a rebuttable presumption that Indemnitee is entitled to
indemnification under this Agreement and the Company shall have the burden of
proof in rebutting such presumption.

                  8.1.2. The termination of any claim by judgment, order,
settlement (whether with or without court approval) or conviction, or upon a
plea of nolo contendere or its equivalent, shall not adversely affect either the
right of Indemnitee to indemnification under this Agreement or the presumptions
to which Indemnitee is otherwise entitled pursuant to the provisions of this
Agreement nor create a presumption that Indemnitee did not meet any particular
standard of conduct or have a particular belief or that a court has determined
that indemnification is not permitted by applicable law.

         8.2.     Appeals; Enforcement.

                  8.2.1. In the event that (a) a Determination is made that
Indemnitee shall not be entitled to indemnification under this Agreement, (b)
any Determination to be made by Independent Legal Counsel is not made within 90
days of receipt by the Company of a request for indemnification pursuant to
Section 4.2.1 or (c) the Company fails to otherwise perform any of its
obligations under this Agreement (including, without limitation, its obligation
to make payments to Indemnitee following any Determination made or deemed to
have been made that such payments are appropriate), Indemnitee shall have the
right to commence a Claim in any court of competent jurisdiction, as
appropriate, to seek a Determination by the court, to challenge or appeal any
Determination which has been made, or to otherwise enforce this Agreement. If a
Change of Control shall have occurred, Indemnitee shall have the option to have
any such Claim conducted by a single arbitrator pursuant to the rules of the
American Arbitration Association. Any such judicial proceeding challenging or
appealing any Determination shall be deemed to be conducted de novo and without
prejudice by reason of any prior Determination to the effect that Indemnitee is
not entitled to indemnification under this Agreement. Any such Claim shall be at
the sole expense of Indemnitee except as provided in Section 9.3.

                  8.2.2. If a Determination shall have been made or deemed to
have been made pursuant to this Agreement that Indemnitee is entitled to
indemnification, the Company shall be bound by such

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Determination in any judicial proceeding or arbitration commenced pursuant to
this Section 8.2, except if such indemnification is unlawful.

                  8.2.3. The Company shall be precluded from asserting in any
judicial proceeding or arbitration commenced pursuant to this Section 8.2 that
the procedures and presumptions of this Agreement are not valid, binding and
enforceable and shall stipulate in any such court or before any such arbitrator
that the Company is bound by all the provisions of this Agreement. The Company
hereby consents to service of process and to appear in any judicial or
arbitration proceedings and shall not oppose Indemnitee's right to commence any
such proceedings.

         8.3.     Procedures. Indemnitee shall cooperate with the Company and
with any Person making any Determination with respect to any Claim for which a
claim for indemnification under this Agreement has been made, as the Company may
reasonably require. Indemnitee shall provide to the Company or the Person making
any Determination, upon reasonable advance request, any documentation or
information reasonably available to Indemnitee and necessary to (a) the Company
with respect to any such Claim or (b) the Person making any Determination with
respect thereto.

         Section 9.       Change in Control Procedures.

         9.1.   Determinations. If there is a Change in Control, any
Determination to be made under Section 4 shall be made by Independent Legal
Counsel selected by Indemnitee and approved by the Company (which approval shall
not be unreasonably withheld). The Company shall pay the reasonable fees of the
Independent Legal Counsel and indemnify fully such Independent Legal Counsel
against any and all expenses (including attorneys' fees), claims, liabilities
and damages arising out of or relating to this Agreement or the engagement of
Independent Legal Counsel pursuant hereto.

         9.2.   Establishment of Trust. Following the occurrence of any
Potential Change in Control, the Company, upon receipt of a written request from
Indemnitee, shall create a Trust (the "Trust") for the benefit of Indemnitee,
the trustee of which shall be a bank or similar financial institution with trust
powers chosen by Indemnitee. From time to time, upon the written request of
Indemnitee, the Company shall fund the Trust in amounts sufficient to satisfy
any and all Losses and Expenses reasonably anticipated at the time of each such
request to be incurred by Indemnitee for which indemnification may be available
under this Agreement. The amount or amounts to be deposited in the Trust
pursuant to the foregoing funding obligation shall be determined by mutual
agreement of Indemnitee and the Company or, if the Company and Indemnitee are
unable to reach such an agreement, or, in any event, a Change in Control has
occurred by Independent Legal Counsel (selected pursuant to Section 9.1). The
terms of the Trust shall provide that, except upon the prior written consent of
Indemnitee and the Company, (a) the Trust shall not be revoked or the principal
thereof invaded, other than to make payments to unsatisfied judgment creditors
of the Company, (b) the Trust shall continue to be funded by the Company in
accordance with the funding obligations set forth in this Section, (c) the
Trustee shall promptly pay or advance to Indemnitee any amounts to which
Indemnitee shall be entitled pursuant to this Agreement, and (d) all unexpended
funds in the Trust shall revert to the Company upon a Determination by
Independent Legal Counsel (selected pursuant to Section 9.1) or a court of
competent jurisdiction that Indemnitee has been fully indemnified under the
terms of this Agreement. All income earned on the assets held in the trust shall
be reported as income by the Company for federal, state, local and foreign tax
purposes.

         9.3.   Expenses. Following any Change in Control, the Company shall be
liable for, and shall pay the Expenses paid or incurred by Indemnitee in
connection with the making of any Determination (irrespective of the
determination as to Indemnitee's entitlement to indemnification) or the
prosecution of any Claim pursuant to Section 8.2, and the Company hereby agrees
to indemnify and hold Indemnitee harmless therefrom. If requested by counsel for
Indemnitee, the Company shall promptly give such
<PAGE>

counsel an appropriate written agreement with respect to the payment of its fees
and expenses and such other matters as may be reasonably requested by such
counsel.

         Section 10.    Period of Limitations. No legal action shall be brought
and no cause of action shall be asserted by or in the right of the Company, any
Subsidiary, any Other Enterprise or any Affiliate of the Company against
Indemnitee or Indemnitee's spouse, heirs, executors, administrators or personal
or legal representatives after the expiration of two years from the date of
accrual of such cause of action, and any claim or cause of action of the
Company, any Subsidiary, any Other Enterprise or any Affiliate of the Company
shall be extinguished and deemed released unless asserted by the timely filing
of a legal action within such two-year period; provided, however, that if any
shorter period of limitations, whether established by statute or judicial
decision, is otherwise applicable to any such cause of action such shorter
period shall govern.

         Section 11.    Contribution. If the indemnification provisions of this
Agreement should be unenforceable under applicable law in whole or in part or
insufficient to hold Indemnitee harmless in respect of any Losses and Expenses
incurred by Indemnitee, then for purposes of this Section 11, the Company shall
be treated as if it were, or was threatened to be made, a party defendant to the
subject Claim and the Company shall contribute to the amounts paid or payable by
Indemnitee as a result of such Losses and Expenses incurred by Indemnitee in
such proportion as is appropriate to reflect the relative benefits accruing to
the Company on the one hand and Indemnitee on the other and the relative fault
of the Company on the one hand and Indemnitee on the other in connection with
such Claim, as well as any other relevant equitable considerations. For purposes
of this Section 11 the relative benefit of the Company shall be deemed to be the
benefits accruing to it and to all of its directors, officers, employees and
agents (other than Indemnitee) on the one hand, as a group and treated as one
entity, and the relative benefit of Indemnitee shall be deemed to be an amount
not greater than the Indemnitee's yearly base salary or Indemnitee's
compensation from the Company during the first year in which the Covered Event
forming the basis for the subject Claim was alleged to have occurred. The
relative fault shall be determined by reference to, among other things, the
fault of the Company and all of its directors, officers, employees and agents
(other than Indemnitee) on the one hand, as a group and treated as one entity,
and Indemnitee's and such group's relative intent, knowledge, access to
information and opportunity to have altered or prevented the Covered Event
forming the basis for the subject Claim.

         Section 12.    Miscellaneous Provisions.

         12.1.    Successors and Assigns, Etc.

                  12.1.1.       This Agreement shall be binding upon and inure
to the benefit of (a) the Company, its successors and assigns (including any
direct or indirect successor by merger, consolidation or operation of law or by
transfer of all or substantially all of its assets) and (b) Indemnitee and the
heirs, personal and legal representatives, executors, administrators or assigns
of Indemnitee.

                  12.1.2.       The Company shall not consummate any
consolidation, merger or other business combination, nor will it transfer 50% or
more of its assets (in one or a series of related transactions), unless the
ultimate Parent of the successor to the business or assets of the Company shall
have first executed an agreement, in form and substance satisfactory to
Indemnitee, to expressly assume all obligations of the Company under this
Agreement and agree to perform this Agreement in accordance with its terms, in
the same manner and to the same extent that the Company would be required to
perform this Agreement if no such transaction had taken place; provided that, if
the Parent is not the Company, the legality of payment of indemnity by the
Parent shall be determined by reference to the fact that such indemnity is to be
paid by the Parent rather than the Company.
<PAGE>

         12.2. Severability. The provisions of this Agreement are severable. If
any provision of this Agreement shall be held by any court of competent
jurisdiction to be invalid, void or unenforceable, such provision shall be
deemed to be modified to the minimum extent necessary to avoid a violation of
law and, as so modified, such provision and the remaining provisions shall
remain valid and enforceable in accordance with their terms to the fullest
extent permitted by law.

         12.3. Rights Not Exclusive; Continuation of Right of Indemnification.
Nothing in this Agreement shall be deemed to diminish or otherwise restrict
Indemnitee's right to indemnification pursuant to any provision of the
Certificate of Incorporation or Bylaws of the Company, any agreement, vote of
stockholders or Disinterested Directors, applicable law or otherwise. This
Agreement shall be effective as of the date first above written and continue in
effect until no Claims relating to any Covered Event may be asserted against
Indemnitee and until any Claims commenced prior thereto are finally terminated
and resolved, regardless of whether Indemnitee continues to serve as a director
of the Company, any Subsidiary or any Other Enterprise.

         12.4. No Employment Agreement. Nothing contained in this Agreement
shall be construed as giving Indemnitee any right to be retained in the employ
of the Company, any Subsidiary or any Other Enterprise.

         12.5. Subsequent Amendment. No amendment, termination or repeal of any
provision of the Certificate of Incorporation or Bylaws of the Company, or any
respective successors thereto, or of any relevant provision of any applicable
law, shall affect or diminish in any way the rights of Indemnitee to
indemnification, or the obligations of the Company, arising under this
Agreement, whether the alleged actions or conduct of Indemnitee giving rise to
the necessity of such indemnification arose before or after any such amendment,
termination or repeal.

         12.6. Notices. Notices required under this Agreement shall be given in
writing and shall be deemed given when delivered in person or sent by certified
or registered mail, return receipt requested, postage prepaid. Notices shall be
directed to the Company at Luminex Corporation, 12212 Technology Boulevard,
Austin, Texas 78727, Attention: Chief Executive Officer, and to Indemnitee at
the address set forth on the signature page hereto (or such other address as
either party may designate in writing to the other).

         12.7. Governing Law. This Agreement shall be governed by and construed
and enforced in accordance with the laws of the State of Delaware applicable to
contracts made and performed in such state without giving effect to the
principles of conflict of laws.

         12.8. Headings. The headings of the Sections of this Agreement are
inserted for convenience only and shall not be deemed to discriminate part of
this Agreement or to affect the construction thereof.

         12.9. Counterparts. This Agreement may be executed in any number of
counterparts all of which taken together shall constitute one instrument.

         12.10. Modification and Waiver. No supplement, modification or
amendment of this Agreement shall be binding unless executed in writing by both
of the parties hereto. No waiver of any of the provisions of this Agreement
shall constitute, or be deemed to constitute, a waiver of any other provisions
hereof (whether or not similar) nor shall any such waiver constitute a
continuing waiver.
<PAGE>

         The parties hereto have caused this Agreement to be duly executed as of
the day and year first above written.

                                     LUMINEX CORPORATION

                                     By:
                                        ------------------------------------
                                     Title:
                                           ---------------------------------

                                     INDEMNITEE

                                     ---------------------------------------
                                     Name:

                                     Address:
                                            --------------------------------

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

                                            --------------------------------<PAGE>
                                                                    EXHIBIT 10.3

                               SUBLEASE AGREEMENT

         This Sublease is made as of the 2nd day of May, 2002 at Travis County,
Texas by and between LUMINEX CORPORATION (herein, "Sublandlord") and AMERICAN
INNOVATIONS, LTD. (herein, "Subtenant").

         Sublandlord is the Lessee under that certain Lease, (the "Main Lease"),
by and between Aetna Life Insurance Company, as landlord, (herein, "Landlord")
and Sublandlord, as tenant, executed on or about October 19, 2001, for the
premises described in the Main Lease (herein, "Leased Premises"), a true and
correct copy of which Main Lease is attached hereto as Exhibit A and
incorporated herein by this reference.

         In consideration of the mutual promises contained herein, Sublandlord
does hereby SUBLEASE, DEMISE and SUBLET to Subtenant and Subtenant hereby
accepts that portion of the Leased Premises containing approximately 21,756
square feet in the building known as McNeil 5 (the "Building"), Suite 100 at
12112 Technology Blvd and more particularly described on Exhibit B attached
hereto (the "Subleased Premises") together with the non-exclusive right to use
the common areas of the Building and the Project, subject to the terms of the
Main Lease and subject further to the provisions of this Sublease, as follows:

1.       Subtenant hereby agrees to abide by and observe all the terms,
         covenants and conditions of the Main Lease as they apply to the
         Subleased Premises. Sublandlord represents that the Main Lease is in
         full force and effect with no amendments thereto and that no Events of
         Default (as described in Section 19 of the Main Lease) have occurred on
         Sublandlord's part under it as of the commencement of the term of this
         Sublease.

2.       The term of this Sublease shall be for a term of 60 months commencing
         on August 1, 2002 and ending July 31, 2007, provided, however, that
         this Sublease shall terminate upon the termination of the Main Lease or
         as otherwise provided herein.

3.       The terms and provisions of the Main Lease, to the extent that they do
         not conflict with specific provisions of this Sublease, are
         incorporated into this Sublease as if fully completely rewritten
         herein. Subtenant shall not commit any act that would constitute a
         default or event of default under the Main Lease. Notwithstanding
         anything in the Sublease to the contrary, the following provisions of
         the Main Lease are not incorporated into or made a part of the
         Sublease: 23.K, 26, and Exhibit E.

4.       The relationship between Subtenant and Sublandlord shall be the same as
         that between Tenant and Landlord under the Main Lease. Notwithstanding
         anything to the contrary contained herein, Sublandlord shall not be
         liable to Subtenant for any Losses (as defined in the Main Lease)
         unless such Losses are directly caused by an act or omission of
         Sublandlord.

         4.1.     Subtenant agrees that with respect to the Subleased Premises,
                  Sublandlord shall have all rights vis-a-vis Subtenant that
                  Landlord has vis-a-vis Sublandlord under the Main Lease. Such
                  rights of Sublandlord include (but are not limited to) (i) the
                  right to receive any notices that Landlord is entitled to
                  receive from Sublandlord under the Main Lease, (ii) the right
                  to require that Subtenant obtain Sublandlord's consent in any
                  and all circumstances that require the consent of Landlord
                  under the Main Lease (provided that if Landlord has granted
                  its consent to any request by Subtenant under the Main Lease,
                  Sublandlord's consent shall not be unreasonably withheld,
                  delayed or conditioned), and (iii) the right to be indemnified
                  by Subtenant against certain damages, costs and expenses as if
                  the indemnity provisions under the Main Lease applied to
                  Subtenant and Sublandlord instead of Sublandlord and Landlord,
                  respectively, and to the Subleased Premises instead of the
                  Leased Premises. Such rights also include the right to act
                  upon a default hereunder by Subtenant in the same manner that
                  Landlord would have the right to act upon a similar default by
                  Sublandlord under the Main Lease. In addition, if Subtenant
                  should fail to fully perform its obligations hereunder,
                  Sublandlord shall have the right, following the earlier of (i)
                  thirty (30) days prior written notice to Subtenant or (ii) the
                  date upon which failure to perform causes an Event of Default
                  under the Main Lease (but in no event earlier than following
                  ten (10) days prior written notice to Subtenant), to perform
                  such obligations on behalf of Subtenant and to charge
                  Subtenant all reasonable costs thereof, whether or not
                  Landlord could similarly perform such obligations on behalf of
                  Sublandlord under the Main Lease.

                  4.2.Subtenant agrees to notify Sublandlord promptly following
                  Subtenant's receipt of written notice of any claim by Landlord
                  that the Main Lease has been breached with respect to the
                  Subleased Premises. The rights of Sublandlord and obligations
                  of Subtenant set out in the other provisions of this Sublease
                  shall supplement, not be in lieu of, the rights of Sublandlord
                  and obligations of Subtenant under this paragraph.

                                      -1-
<PAGE>

5.       Subtenant agrees to pay Sublandlord, as base rent ("Base Rent") for the
         Subleased Premises, the amounts shown in the table immediately below.
         Such Base Rent shall be payable in advance on the 1st day of each
         calendar month during the term of this Sublease.
<TABLE>
<CAPTION>
----------------------- ----------------------- ------------------------- ------------------------
PERIOD                       ANNUAL RENT              MONTHLY RENT           MO. RENT/SQ. FT.
----------------------- ----------------------- ------------------------- ------------------------
<S>                     <C>                     <C>                       <C>
Months 1-3                               $0.00                     $0.00                    $0.00
----------------------- ----------------------- ------------------------- ------------------------
Months 4-36                        $169,696.80                $14,141.40                    $0.65
----------------------- ----------------------- ------------------------- ------------------------
Months 37-48                       $182,750.40                $15,229.20                    $0.70
----------------------- ----------------------- ------------------------- ------------------------
Months 49-60                       $195,804.00                $16,317.00                    $0.75
----------------------- ----------------------- ------------------------- ------------------------
</TABLE>

6.       The Base Rent payable by Subtenant shall be increased by an amount
         ("Additional Rent") equal to Subtenant's Pro Rata Share of the Main
         Lease Obligations. For purposes of this Sublease, "Main Lease
         Obligations" shall mean the share of Tenant Costs (as defined in the
         Main Lease) and all other amounts that Sublandlord is obligated to pay
         under the Main Lease for the term of this Sublease, except for
         Sublandlord's obligation to pay Base Rent as specified in Section 2A of
         the Main Lease. "Subtenant's Pro Rata Share" shall mean (i) the
         percentage (calculated based on the ratio of the square footage of the
         Subleased Premised to the Leased Premises) of all Main Lease
         Obligations other than Main Lease Obligations that become due because
         of a default by Sublandlord under the Main Lease or failure of
         Sublandlord to timely perform any obligation under the Main Lease, (ii)
         l00% with respect to any Main Lease Obligations that become due solely
         because of a default by Sublandlord under the Main Lease if such
         default is caused solely by Subtenant's failure to abide by the terms
         of this Sublease, and (iii) 0% with respect to any Main Lease
         Obligations that become due because of a default by Sublandlord under
         the Main Lease, if such default is not caused by Subtenant's failure to
         abide by the terms of this Sublease. Following receipt of a timely
         request from Subtenant, Sublandlord shall exercise its right to conduct
         an audit as provided under the Main Lease and Subtenant shall pay
         Subtenant's Pro Rata Share of the cost of such audit.

7.       All payments of Base Rent and Additional Rent shall be paid to
         Sublandlord at the address specified in this Sublease or elsewhere as
         designated from time to time by written notice from Sublandlord to
         Subtenant; provided, however, if Landlord wishes to collect such
         payments directly from Subtenant and credit Sublandlord therefore under
         the Main Lease, then Subtenant, following at least ten (10) days prior
         written notice from Landlord, will pay such amounts to Landlord at the
         address of Landlord specified in the Main Lease and will simultaneously
         send evidence of such payment to Sublandlord.

8.       Within three (3) business days after Subtenant receives a fully
         executed original of this Sublease, Subtenant shall deposit with
         Sublandlord the sum of eighteen thousand five hundred dollars
         ($18,500.00) as a security deposit to be held by Sublandlord pursuant
         to the provisions of the Main Lease.

9.       Sublandlord agrees to provide Subtenant with an allowance (the
         "Sublease Allowance") for the construction of tenant improvements
         within the Subleased Premises (the "Sublease Tenant Improvements").
         Such Sublease Allowance and Sublease Tenant Improvements shall be
         approved, administered and disbursed in accordance with Exhibit C of
         the Main Lease, provided that the per square foot value of the Sublease
         Allowance shall be $6.00. All Sublease Tenant Improvements must be
         approved by Sublandlord and Landlord in accordance with the procedures
         set forth in the Main Lease. Subtenant shall remain liable at all times
         for its obligations under this Sublease despite any delay in completion
         of the Sublease Tenant Improvements (unless any such delay is
         attributable solely to Sublandlord's acts or omissions).

10.      If at any time during the term of this Sublease, Sublandlord receives a
         bona fide offer to sublease all or any portion of Sublandlord's
         remaining space in the Building, which offer Sublandlord intends to
         accept, Sublandlord shall give Subtenant written notice of such offer
         and give Subtenant five (5) business days to accept such offer. Should
         Subtenant fail to exercise its right to sublease such space within such
         five (5) business day period, Sublandlord shall have the right to
         sublease the space upon the terms contained within such offer.
         Subtenant's right of first refusal as set forth herein is subject to
         the condition that on the date that Subtenant delivers its notice
         exercising its right of first refusal, no uncured event of default
         exists and is continuing hereunder. If the offer on such space is for a
         term that ends on or before the expiration date of this Sublease, then
         Subtenant's sublease of any such space will be coterminous with the
         term of this Sublease. If the offer on such space is for a term that
         ends after the expiration date of this Sublease, then Subtenant may, at
         its option, extend the term of this Sublease to be coterminous with the
         term of any such space. In such event, the Base Rent for the extended
         term of this Sublease shall be the Base Rent payable under the Main
         Lease with respect to the Subleased Premises.

                                      -2-
<PAGE>

11.      Sublandlord and Subtenant each warrant to the other that it has not
         dealt with any broker or agent in connection with this Lease other than
         Colliers Oxford Commercial ("Colliers") and Endeavor Real Estate Group
         ("Endeavor"). If but only if, the parties to this Sublease validly
         execute and deliver this Sublease and Landlord delivers its consent to
         this Sublease (the date of completion of such items, the "Valid
         Agreement Date"), Sublandlord shall pay to Endeavor a commission equal
         to 4% of the Base Rent, taxes, insurance and common area maintenance
         expenses due under this Sublease (the "Commission"), payable as
         follows: (a) 50% of the Commission by the date which is 30 days
         following the Valid Agreement Date, and (b) the remaining 50% of the
         Commission by the date which is 30 days following the occupancy of
         Subtenant in the Subleased Premises and the commencement of Subtenant's
         payment of Base Rent hereunder. Subtenant and Sublandlord shall each
         indemnify the other against all costs, legal fees, and other
         liabilities for commissions or other compensation claimed by any broker
         or agent (other than the Colliers and Endeavor) claiming the same by,
         through, or under the indemnifying party.

12.      Time is of the essence of this Sublease, and each and all the terms
         hereof.

13.      Any notice or other communication required or permitted to be given
         under this Sublease or under the Main Lease shall be in writing and
         shall be deemed to be delivered on the date it is hand delivered to the
         party to whom such notice is given, at the address set forth below, or
         if such notice is mailed, on the date on which it is deposited in the
         United States Mail, postage prepaid, certified or registered mail,
         return receipt requested, addressed to the party to whom such notice is
         directed, at the address set forth below:

         IF TO SUBLANDLORD:                IF TO SUBTENANT:

         Luminex Corporation               American Innovations, Ltd.
         12212 Technology Blvd.            12112 Technology Blvd., Suite 100
         Austin, TX 78727                  Austin, TX 78727
         Attention: General Counsel        Attention: Contracts Administrator

14.      Subtenant shall have no right to assign or sublet any interest in this
         Sublease without first obtaining the written consent of the Landlord
         and Sublandlord, which consent by Landlord is subject to the terms of
         the Main Lease and which consent by Sublandlord shall not be
         unreasonably withheld. Subtenant may, without Sublandlord 's prior
         written consent and without payment of any amount to Sublandlord or
         Landlord, sublet the Subleased Premises or assign the Sublease to (i) a
         subsidiary, affiliate, division, or corporation controlling, controlled
         by, or under common control with Subtenant, or (ii) a successor
         corporation related to Subtenant by merger, consolidation,
         non-bankruptcy reorganization, or government action, provided that if
         the Subtenant no longer exists, the successor corporation's net worth
         is equal to or greater than the net worth of Subtenant at the time of
         such assignment. Subtenant shall give notice to Sublandlord prior to
         the effective date of any assignment/sublease not requiring
         Sublandlord's consent.

15.      Sublandlord shall have no liability to Subtenant for any wrongful
         action or default on the part of Landlord pursuant to the terms of the
         Main Lease, and Subtenant hereby agrees to look solely to Landlord in
         event of any such default, the liability and obligations of Sublandlord
         being solely pursuant to the terms and conditions of this Sublease. If
         Landlord shall default in the performance of any of its material
         obligations under the Main Lease, Sublandlord shall, upon the written
         request of Subtenant, use reasonably diligent, good faith efforts to
         promptly enforce the Main Lease (including, without limitation,
         Landlord's obligations with respect to providing services to the
         Subleased Premises) and obtain Landlord's compliance with its
         obligations thereunder, such efforts, as they relate to the Subleased
         Premises, and to the extent not paid by Landlord, to be funded by
         Subtenant. Without limiting the generality of the foregoing sentence,
         Sublandlord shall, without request of Subtenant, use reasonably
         diligent, good faith efforts to promptly enforce the Main Lease with
         respect to Landlord's obligations under Paragraph 5.C thereof and
         promptly deliver to Subtenant copies of all information received
         thereunder.

16.      In the event any one or more of the provisions contained in this
         Sublease shall for any reason be held invalid, illegal, or
         unenforceable in any respect, such invalidity, illegality or
         unenforceability shall not affect any other provision hereof and this
         agreement shall be construed as if such invalid, illegal or
         unenforceable provisions had never been contained herein.

17.      Provided that Subtenant pays the Base Rent and Additional Rent and
         other sums herein recited to be paid by Subtenant and performs all of
         Subtenant's covenants and agreements herein contained, Sublandlord
         covenants that Subtenant shall, and may peacefully have, hold and enjoy
         the Subleased Premises against any person whomsoever lawfully claiming
         the same or any part thereof by, through, or under Sublandlord, but not
         otherwise, subject to the other provisions hereof and those of the Main
         Lease. Sublandlord agrees that it will not enter any amendment of the
         Main Lease which materially adversely affects the rights of Subtenant
         hereunder (including, without limitation, any agreement not

                                      -3-
<PAGE>

         expressly contemplated in the Lease to terminate the Main Lease with
         respect to the Subleased Premises) without the prior written consent of
         Subtenant, which consent will not be unreasonably withheld.

18.      Sublandlord shall indemnify Subtenant for and hold Subtenant harmless
         from and against all costs, expenses (including reasonable attorneys'
         fees), fines, suits, claims, demands, liabilities and actions resulting
         from any breach, violation or nonperformance of any covenant or
         condition hereof or from the use or occupancy of the Premises
         (excluding the Subleased Premises) by Sublandlord or Sublandlord's
         employees, agents, contractors, licensees and invitees. The foregoing
         indemnification of Subtenant does not provide indemnification for
         negligence or willful misconduct.

19.      Subtenant shall indemnify Sublandlord for and hold Sublandlord harmless
         from and against all costs, expenses (including reasonable attorneys'
         fees), fines, suits, claims, demands, liabilities and actions resulting
         from any breach, violation or nonperformance of any covenant or
         condition hereof or from the use or occupancy of the Subleased Premises
         by Subtenant or Subtenant's employees, agents, contractors, licensees
         and invitees. The foregoing indemnification of Sublandlord does not
         provide indemnification for negligence or willful misconduct.

20.      Each insurance policy which is required under the provisions of
         Paragraph 10.E of the Main Lease to contain a waiver of subrogation
         with respect to the tenant thereunder will also contain a waiver of
         subrogation with respect to Subtenant.

21.      If at any time Sublandlord has executed a subordination and
         non-disturbance agreement with Landlord's lender (an "SNDA") as set
         forth in Paragraph 21 of the Main Lease, Sublandlord shall (a) provide
         a copy of the SNDA to Subtenant, and (b) use reasonable efforts to
         enforce Subtenant's rights under the Sublease in accordance with the
         SNDA.

22.      Subtenant shall be permitted to use the parking area situated in the
         Project (as defined in the Main Lease) for non-designated parking at
         the rate of 2.68 spaces per 1,000 square feet in the Subleased
         Premises. Use of the parking area by Subtenant shall be subject to the
         provisions of Paragraph 5.B of the Main Lease.

23.      The failure of either party to insist at any time upon the strict
         performance of any covenant or agreement or to exercise any option,
         right, power or remedy contained in this Sublease shall not be
         construed as a waiver thereof. The waiver of any violation of any term,
         covenant, agreement or condition contained in this Sublease shall not
         prevent a subsequent act, which would have originally constituted a
         violation, from having all the force and effect of an original
         violation. No express waiver shall affect any condition other than the
         one specified in such waiver and that one only for the time and in the
         manner specifically stated. A receipt by Sublandlord of any rent with
         knowledge of the breach of any covenant or agreement contained in this
         Sublease shall not be deemed a waiver of such breach No waiver by
         either party of any provision of this Sublease shall be deemed to have
         been made unless expressed in writing and signed by such party. The
         provisions of Paragraph 23.D of the Main Lease shall apply to the
         obligations of both parties hereunder.

24.      Should either party hereto institute any action or proceeding in court
         to enforce any provision hereof or for damages by reason of any alleged
         breach of any provision of this Sublease or for any other judicial
         remedy, the prevailing party shall be entitled to receive from the
         losing party all reasonable attorneys' fees and all court costs in
         connection with said proceeding.

25.      All of the covenants, agreements, terms and conditions to be observed
         and performed by the parties hereto shall be applicable to and binding
         upon their respective heirs, personal representatives, successors and,
         to the extent assignment is permitted hereunder, their respective
         assigns.

26.      Sublandlord or Sublandlord's agents have made no representations or
         promises with respect to the Subleased Premises except as herein
         expressly set forth and no rights, easements or licenses are acquired
         by Subtenant by implication or otherwise except as expressly set forth
         in the provisions of this Sublease.

27.      Sublandlord and Subtenant represent to the other that each person
         signing this Sublease on behalf of such party was and continues to be
         authorized to do so.

28.      This agreement constitutes the sole and only agreement of the parties
         hereto and supersedes any prior understandings and written or oral
         agreements between the parties respecting the subject matter of this
         Sublease.

29.      This Sublease is contingent upon Landlord's consent and approval, which
         is to be evidenced by the signature of Landlord below. If Landlord's
         written consent (including the non-disturbance agreement described in
         paragraph 30 below) to this Sublease is not obtained by 5:00 p.m.
         Central time on the

                                      -4-
<PAGE>

         seventh (7th) business day following the full execution of this
         Sublease, this Sublease agreement shall automatically terminate and be
         of no further force and effect.

30.      Prior to the commencement of the term of this Sublease, Sublandlord
         shall attempt to obtain from Landlord a non-disturbance agreement in a
         form reasonably acceptable to Subtenant obligating Subtenant to remain
         in possession of the Subleased Premises in the event of a termination
         of the Main Lease or Sublandlord's rights of possession thereunder,
         such possession by Subtenant to be subject to the terms of the Main
         Lease regarding the Subleased Premises.

31.      Provided Subtenant pays the Base Rent and Additional Rent and other
         sums herein recited to be paid by Subtenant and performs all of
         Subtenant's covenants and agreements herein contained, in the event the
         Main Lease is terminated by Sublandlord or Landlord as a result of a
         default by either party thereunder (or is terminated by Sublandlord and
         Landlord as a result of a mutual agreement not expressly contemplated
         in the Lease), Sublandlord agrees to reimburse Subtenant for its
         Termination Losses. As used herein, the term "Termination Losses" means
         the difference between (a) the base rent paid by Subtenant under the
         Main Lease for the Subleased Premises, and (b) the Base Rent which
         would have been paid by Subtenant under the Sublease for the Subleased
         Premises for the comparable period, relating only to the period
         remaining during the term hereof.

EXECUTED to be effective on the day and year first above written.

SUBLANDLORD:                               SUBTENANT:

Luminex Corporation                        American Innovations, Ltd.

By:      /s/ Mark Chandler                 By:      /s/ Richard Smalling
         -----------------                          --------------------
Name:    Mark B. Chandler, Ph.D.           Name:    Richard J. Smalling
Title:   CEO & President                   Title:   President

                                      -5-
<PAGE>
                               CONSENT BY LANDLORD

Landlord, as landlord under the Main Lease referred to in this Sublease, hereby
consents to the foregoing Sublease Agreement, provided that this Sublease in no
way modifies or amends the Main Lease, and such consent shall not be construed
in any way as a consent to any other sublease of the Leased Premises or
assignment of the Lease.

AETNA LIFE INSURANCE COMPANY

By:  UBS Realty Investors LLC, its Investment
     Advisers and Agent

     By:  /s/ James G. Hughes
            ------------------
     Name:  James G. Hughes
     Title: Director

                                      -6-
<PAGE>

                                    EXHIBIT A

                           Main Lease signed 10-19-01

<PAGE>

                                    EXHIBIT B

                               Subleased Premises

                               [Diagram inserted.]

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