Document:

<PAGE>

                                                                   EXHIBIT 10.54

                                            ***TEXT OMITTED AND FILED SEPARATELY
                                                CONFIDENTIAL TREATMENT REQUESTED
                                           UNDER 17 C.F.R. SECTIONS 200.80(b)(4)
                                                                   AND 240.24B-2

                              TRC LICENSE AGREEMENT

                                     BETWEEN

                                TOSOH CORPORATION

                                       AND

                             GEN-PROBE INCORPORATED

                         EFFECTIVE AS OF JANUARY 1, 2004

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                               TABLE OF CONTENTS

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                                                                                           PAGE
<S>                                                                                        <C>
ARTICLE I         DEFINITIONS........................................................        1

ARTICLE II        GRANT OF RIGHTS....................................................        4

     2.1    Grant of License Under Tosoh Patent Rights...............................        4

     2.2    Sublicensing.............................................................        5

     2.3    Ownership; No Implied Rights.............................................        5

ARTICLE III       RUNNING ROYALTIES..................................................        5

     3.1    Running Royalties........................................................        5

     3.2    Accrual of Running Royalties.............................................        6

     3.3    [...***...]..............................................................        7

     3.4    Running Royalties Payments...............................................        7

     3.5    Withholding Taxes........................................................        7

     3.6    Royalty Reports..........................................................        7

     3.7    Books of Accounts and Records............................................        8

     3.8    Late Payments............................................................        8

ARTICLE IV        REPRESENTATIONS AND WARRANTIES, ETC................................        8

     4.1    Legal Right..............................................................        8

     4.2    Authorization............................................................        8

     4.3    Required Actions.........................................................        8

     4.4    Tosoh Patent Rights......................................................        9

     4.5    No Claim.................................................................        9

     4.6    Disclaimer...............................................................        9

     4.7    Limitation of Liability..................................................        9

ARTICLE V         INDEMNIFICATION....................................................        9

     5.1    Indemnification by Gen Probe.............................................        9

     5.2    Procedures...............................................................       10

ARTICLE VI        TERM AND TERMINATION...............................................       10

     6.1    Term.....................................................................       10

     6.2    Material Breach By Gen Probe.............................................       10

     6.3    Material Breach by Tosoh.................................................       10

     6.4    Survival.................................................................       10
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                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      -i-

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                                TABLE OF CONTENTS
                                   (CONTINUED)
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ARTICLE VII       PATENT MARKING.....................................................       11

     7.1    Patent Marking...........................................................       11

ARTICLE VIII      ARBITRATION........................................................       11

     8.1    Arbitration..............................................................       11

ARTICLE IX        MISCELLANEOUS......................................................       11

     9.1    Assignment...............................................................       11

     9.2    Governing Law............................................................       11

     9.3    Counterparts.............................................................       11

     9.4    No Third Party Benefits..................................................       12

     9.5    Headings.................................................................       12

     9.6    Binding Effect...........................................................       12

     9.7    Compliance With Law......................................................       12

     9.8    Notices..................................................................       12

     9.9    Amendment and Waiver.....................................................       12

     9.10   Severability.............................................................       12

     9.11   Attorneys' Fees..........................................................       13

     9.12   Confidentiality..........................................................       13

     9.13   Entire Agreement.........................................................       13

     9.14   Press Release............................................................       13
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                                      -ii-
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                                                                    Confidential

                                                                      12/02/2003

                              TRC LICENSE AGREEMENT

         THIS TRC LICENSE AGREEMENT (this "AGREEMENT"), effective as of January
1, 2004 ("EFFECTIVE DATE"), entered into by and between the following parties:

TOSOH CORPORATION, a corporation duly organized under the laws of Japan, having
its principal place of business at 3-8-2, Shiba, Minato-ku, Tokyo, 105-8623,
Japan ("TOSOH"), and

GEN-PROBE INCORPORATED, a corporation duly organized under the laws of the State
of Delaware, having its principal place of business at 10210, Genetic Center
Drive, San Diego, California, 92121-4362, U.S.A. ("Gen-Probe").

                                    PREAMBLE

         A.       Tosoh has developed and owns proprietary technologies relative
to the amplification of genetic targets for use in nucleic acid tests for
detection of infectious diseases, cancers, and microorganisms (including without
limitation viruses), referred to as the Transcription Reverse-Transcription
Concerted Amplification Method or the "TRC" and the detection probe and method
referred to as the Intercalation Activating Fluorescence Probe or the "INAF
Probe", and has the right to grant licenses under the Tosoh Patent Rights as
defined below.

         B.       Gen-Probe has developed proprietary technology relative to the
amplification of genetic targets for use in nucleic acid tests for the detection
of infectious diseases, cancers, and microorganisms (including without
limitation viruses), referred to as the Transcription-Mediated Amplification
Method.

         C.       Gen-Probe desires to obtain from Tosoh a license to develop,
make, have made, use, sell or offer for sale Licensed Products as defined below,
and practice Licensed Methods as defined below.

         D.       Tosoh is willing to grant such a license on the terms and
conditions provided herein.

         NOW, THEREFORE, in consideration of the mutual covenants set forth
hereinafter, the parties hereby agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

For purposes of this Agreement, except as otherwise expressly provided herein or
unless the context herein otherwise requires, the following initially
capitalized terms shall have the meanings specified below:

         "AFFILIATE" means a corporation or other legal entity that controls, is
controlled by or is under common control with either Party directly or
indirectly through one or more

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                                                                    Confidential

intermediaries. For purposes of this definition, "control" means the legal or
beneficial ownership, directly or indirectly, of more than fifty percent (50%)
of the outstanding equity securities of a corporation which are entitled to vote
in the election of directors or persons performing similar functions, or of more
than fifty percent (50%) interest in the net assets or profits of an entity
which is not a corporation; provided that such corporation or entity shall be
deemed to be an Affiliate for purposes of this Agreement only so long as such
Party maintains such ownership or control. Notwithstanding the foregoing, if,
due to compliance by either Party with the requirements imposed by a foreign
investment law or similar law, such Party is not able to own more than fifty
percent (50%) of the outstanding shares of a joint venture company established
in the country of such law, such Party shall be entitled to regard a joint
venture company of which it owns fifty percent (50%) or less of such shares to
be its Affiliate as long as such Party has the veto power to the decisions of
major corporate matters of such joint venture company, upon written prior notice
to the other Party as to the name of such joint venture and the requirements of
such law, together with documentary proof of such requirements.

         "ASIAN COUNTRIES" means Japan, People's Republic of China, Taiwan,
Republic of Korea, North Korea, Mongolia, Hong Kong, Republic of the
Philippines, Socialist Republic of Vietnam, Kingdom of Cambodia, Lao People's
Democratic Republic, Kingdom of Thailand, Singapore, Federation of Malaysia,
Republic of Indonesia, Democratic Republic of East Timor, Brunei, Union of
Myanmar, Kingdom of Bhutan, Kingdom of Nepal, People's Republic of Bangladesh,
India, Sri Lanka, Republic of Maldives, Islamic Republic of Pakistan, Republic
of Turkey, Islamic Republic of Iran, Islamic State of Afghanistan, Azerbaijan
Republic, Republic of Armenia, Republic of Uzbekistan, Republic of Turkmenistan,
Republic of Tadzhikistan, Republic of Kazakhstan, Kyrgyz Republic and Republic
of Russia.

         "CALENDAR YEAR" means a calendar year commencing on January 1 and
ending on December 31.

         "DISPUTE" means any dispute, controversy or claim between the Parties
relating to, arising out of, or in any way connected to, any provision of this
Agreement or any ancillary agreements hereto.

         "EFFECTIVE DATE" means the date first set forth above.

         "EXCHANGE RATE" means, with respect to any amount to be converted from
a foreign currency to Japanese Yen hereunder, the TTS rate quoted by the Bank of
Tokyo-Mitsubishi, Limited, New York Branch on the closing of the last banking
day in New York of a Royalty Period.

         [...***...] shall mean [...***...] and [...***...].

         "FIELD" means the field of [...***...].

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       2.

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                                                                    Confidential

         "FIRST COMMERCIAL SALE" means the first sale by Gen-Probe or its
Affiliate of any Licensed Product or the first practice by Gen-Probe or its
Affiliate of any Licensed Method for consideration (and not for demonstration,
government approval, testing or promotional purposes), whichever is earlier.

         "INAF PATENTS" means (a) the patents and patent applications as
classified as such on Exhibit A; (b) all other patents and applications therefor
claiming priority from any of such patents or patent applications; and (c) all
reissues, reexaminations, renewals and extensions, continuations,
continuations-in-part, amendments and divisions of any of the foregoing patents
or patent applications set forth in (a) and (b).

         "ISSUED VALID CLAIM" means any claim of the issued and unexpired
patents included within the Tosoh Patent Rights that has not been held
unenforceable or invalid by any court, governmental agency, regulatory
authority, arbitral tribunal or other body of competent jurisdiction in any
unappealable or unappealed decision.

         "JAPANESE YEN" means the lawful currency of Japan. All references in
this Agreement to monetary amounts shall be to Japanese Yen, unless otherwise
stated.

         "LICENSED METHOD" means any method, (a) the use or practice of which
would constitute, but for the license granted herein, an infringement of any
Issued Valid Claim, and (b) utilizes the TMA Method.

         "LICENSED PRODUCT" means any product, (a) the developing, making,
using, selling, offering for sale, disposal or importation of which would
constitute, but for the license granted herein, an infringement of any Issued
Valid Claim and (b) utilizes the TMA Method.

         "NET SALES" means the aggregate amount of revenue in Japanese Yen
(converted as necessary for sales made in a currency other than Japanese Yen
into Japanese Yen at the applicable Exchange Rate in accordance with the
definition of "Exchange Rate") received or receivable by Gen-Probe and/or its
Affiliates with respect to all Licensed Products sold or otherwise disposed of
and all Licensed Methods practiced by Gen-Probe or its Affiliates for
consideration during a Royalty Period (for any such Licensed Product sold or
otherwise disposed of, or Licensed Method practiced for consideration other than
cash, the sales price shall be deemed to be the average price at which identical
or similar (after reasonable adjustments) Licensed Products or Licensed Methods
sold or practiced by Gen-Probe or its Affiliates during the same Royalty Period
in "arms length" transactions), less only the following:

                  (a)      the total amount of all credits and allowances
reasonably granted by Gen-Probe and its Affiliates (if any) for such Licensed
Products and Licensed Methods during such Royalty Period on account of refunds,
price reductions, price discounts or rebates, whether arising out of recalls,
rejections, returns or otherwise relating to Licensed Products sold or Licensed
Method practiced prior to such Royalty Period (and for which royalties were
previously paid hereunder);

                  (b)      the total amount of all excise taxes, sales taxes,
value added taxes, consumption taxes, customs duties and other taxes or duties
(excluding income taxes or franchise taxes) imposed with respect to such
Licensed Products sold and such Licensed Method practiced;

                                       3.
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                                                                    Confidential

                  (c)      the total amount of all separately itemized
transportation charges (including packing, insurance, and freight costs)
actually incurred in connection with the sales of such Licensed Products and
practice of Licensed Method; and

                  (d)      the portion of the revenues received or receivable of
the Licensed Products (to the extent previously included in the calculation of
"Net Sales" above) reasonably allocable to recovery of costs of the rented
instruments, analyzers or similar equipment pursuant to "reagent/rental"
programs or comparable sale or lease programs (including instrument
upgrade/maintenance programs).

         "PARTY" or "PARTIES" means, in the singular, Tosoh or Gen-Probe and in
the plural, Tosoh and Gen-Probe.

         "ROYALTY PERIOD" means a [...***...] period beginning on each
[...***...] or [...***...], without regard to whether such date is otherwise a
business day.

         "TERM" means the term of this Agreement set forth in Section 6.1
hereof.

         "TERRITORY" means the Japan and all other countries in the world.

         "TMA METHOD" means the method defined as such in the TMA License
Agreement.

         "TMA LICENSE AGREEMENT" means that certain TMA License Agreement of
even date herewith made and entered into by and between the Parties.

         "TOSOH PATENT RIGHTS" means the INAF Patents and TRC Patents. As used
herein, "Tosoh Patent Rights" shall not include rights to specific nucleic acid
sequences claimed by any of the above patents and patent applications.

         "TRC PATENTS" means (a) the patents and patent applications as
classified as such on Exhibit A; (b) all other patents and applications therefor
claiming priority from any of such patents or patent applications; and (c) all
reissues, reexaminations, renewals and extensions, continuations,
continuations-in-part, amendments and divisions of any of the foregoing patents
or patent applications set forth in (a) and (b).

                                   ARTICLE II

                                 GRANT OF RIGHTS

         2.1      GRANT OF LICENSE UNDER TOSOH PATENT RIGHTS. Subject to the
terms and conditions of this Agreement, Tosoh hereby grants Gen-Probe, and
Gen-Probe hereby accepts, a non-exclusive, non-transferable, royalty-bearing
license under the Tosoh Patent Rights to develop, make, have made, use, import,
offer for sale, sell, have sold or otherwise dispose of Licensed Products and to
practice Licensed Methods, in the Field (a) in the Territory excluding the Asian
Countries for a period of [...***...] following the Effective Date, and (b) in
the Territory including the Asian Countries following the expiration of such
[...***...] period and continuing for the term of this Agreement; provided,
however, that (A) specifically excluded from such license granted by Tosoh are
(i) any product or method for the [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       4.
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                                                                    Confidential

[...***...], and (ii) [...***...], and (B) (i) for a period of [...***...]
following the Effective Date, such license Grant by Tosoh expressly excludes (I)
making, having made, using, importing, offering for sale, selling, having sold
or otherwise disposing of any Licensed Product in any country that determines
the presence or amount of nucleic acid derived from an Excluded Organism, and
(II) practicing any Licensed Method in any country that determines the presence
or amount of nucleic acid derived from an Excluded Organism, and (ii) following
the expiration of such [...***...] period and continuing for the term of this
Agreement, such license grant by Tosoh expressly excludes (I) making, having
made, using, importing, offering for sale, selling, having sold or otherwise
disposing of any Licensed Product in any country other than the United States
that determines the presence or amount of nucleic acid derived from an Excluded
Organism, and (II) practicing any Licensed Method in any country other than the
United States that determines the presence or amount of nucleic acid derived
from an Excluded Organism.

         2.2      SUBLICENSING. Gen-Probe shall have the right to sublicense to
its Affiliates the licenses granted by Tosoh to Gen-Probe under Section 2.1
above but without any right to sublicense further. Gen-Probe shall not have the
right to grant a sublicense to any party other than its Affiliates under the
Tosoh Patent Rights without the prior written consent of Tosoh.

         2.3      OWNERSHIP; NO IMPLIED RIGHTS. Tosoh shall retain the
unrestricted right to use, and/or license for use for any purpose whatsoever the
Tosoh Patent Rights inside or outside the Field, except that Tosoh may not
exercise such right in contravention of, or in conflict with, the express terms
and conditions hereof. Except for the licenses and rights expressly granted
hereunder, no right, title, or interest in any discovery, invention or other
technology, data or information or any patent, copyright, trademark, or other
intellectual property rights therein owned by Tosoh or its Affiliates shall be
granted to Gen-Probe under this Agreement. Tosoh shall not be under any
obligation to grant to Gen-Probe any additional licenses and rights other than
those granted hereby.

                                  ARTICLE III

                                RUNNING ROYALTIES

         3.1      RUNNING ROYALTIES. In consideration of the licenses granted
under the Tosoh Patent Rights, Gen-Probe agrees to pay to Tosoh a royalty on the
total Net Sales of all the Licensed Products sold or otherwise disposed of by
Gen-Probe and its Affiliates for consideration and all the Licensed Methods
practiced by Gen-Probe and its Affiliates during a Royalty Period, for
consideration, at the following flat rates:

                  (a)      with respect to the Licensed Products or the Licensed
Methods practicing the TRC Patents:

                           (i)      [...***...] on all sales and depositions
made in Japan;

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       5.
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                                                                    Confidential

                           (ii)     [...***...] on all sales and depositions
made in an Asian Country except Japan; and

                           (iii)    [...***...] on all sales and depositions
made in any country other than the Asian Countries; and

                  (b)      with respect to the Licensed Products or the Licensed
Methods practicing the INAF Patents:

                           (i)      [...***...] on all sales and depositions
made in Japan;

                           (ii)     [...***...] on all sales and depositions
made in an Asian Country except Japan;

                           (iii)    [...***...] on all sales and depositions
made in any country other than the Asian Countries.

         3.2      ACCRUAL OF RUNNING ROYALTIES. Running royalties shall accrue
on Licensed Products or Licensed Methods only to the extent that Gen-Probe or
its Affiliates make, have made, use, sell, offer to sell, import or otherwise
dispose of such Licensed Products or practice such Licensed Method for
consideration in a country in the Territory in which such act would infringe an
Issued Valid Claim in that country but for the license granted hereunder;
provided, however, that no royalty shall accrue with respect to a reasonable
number of Licensed Products sold or otherwise disposed by Gen-Probe for
demonstration, government approval, development, quality assurance, testing or
promotional purposes.

For the avoidance of doubt:

                  (a)      Any running royalty shall not accrue with respect to
Licensed Products made, had made, used, imported, sold, offered for sale or
otherwise disposed of or Licensed Methods practiced, in a country in the
Territory in which (i) there exists no Issued Valid Claim or (ii) such act would
not infringe an Issued Valid Claim in that country;

                  (b)      If and when Licensed Products are made or had made in
a country in the Territory in which such act would infringe an Issued Valid
Claim in that country but for the license granted hereunder and sold or
otherwise disposed of for consideration in a country, whether or not there
exists an Issued Valid Claim in that country or whether or not such sales or
disposal would not infringe an Issued Valid Claim in that country, then the Net
Sales of the sales and disposal by Gen-Probe or its Affiliates of such Licensed
Products to or in the country in the Territory in which the Licensed Products
are sold or otherwise disposed of shall be used for the purpose of calculating
the running royalties.

                  (c)      If and when Licensed Products are made or had made in
a country in the Territory in which such act would not infringe an Issued Valid
Claim in that country and sold or otherwise disposed of for consideration in a
country in which such act would infringe an Issued Valid Claim in that country,
then the Net Sales of the sales and disposal by Gen-Probe or its Affiliates of
such Licensed Products in the country in the Territory in which the Licensed

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       6.
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                                                                    Confidential

Products are sold or otherwise disposed of shall be used for the purpose of
calculating the running royalties.

                  (d)      No running royalties shall accrue at the time of the
transfer, sale or disposal of Licensed Products by Gen-Probe to any of its
Affiliates or by any of its Affiliates to another Affiliate. In such event,
running royalties shall accrue at the time of the sale or disposal of Licensed
Products by such Affiliate to any third party.

         3.3      [...***...]

         3.4      RUNNING ROYALTIES PAYMENTS. The running royalties accrued
under Section 3.2 above shall be paid by Gen-Probe on a Royalty Period basis.
Payments shall be made within [...***...] of the end of each Royalty Period. All
running royalties payable under Section 3.2 shall first be calculated in the
currency of sale and then converted into Japanese Yen based upon the Exchange
Rate, and shall be made in Japanese Yen without deduction of exchange fees and
bank commissions charged by the sending bank in the United States. Payments
shall be made by Gen-Probe to Tosoh by wire transfer to the bank account as
instructed by Tosoh in writing.

         3.5      WITHHOLDING TAXES. In the event that Gen-Probe is required to
withhold taxes imposed on any payment to Tosoh hereunder by virtue of applicable
law or regulations in the United States and/or in a country in which its
Affiliate sublicensed hereunder is located, then such withholding tax shall be
paid by Gen-Probe to the appropriate tax authorities on a timely basis by
deducting it from the payment due Tosoh, and Gen-Probe shall provide Tosoh with
official documentation and/or tax receipt on such withholdings supporting such
payment of taxes as may be required by Tosoh for its tax records. Upon request
by Tosoh, Gen-Probe and Tosoh shall cooperate in obtaining a reduced tax rate
under an international tax convention.

         3.6      ROYALTY REPORTS. A royalty report containing the following
information shall accompany each royalty payment:

                  (a)      The total revenues of Licensed Products sold and
Licensed Method practiced by Gen-Probe and its Affiliates during the applicable
Royalty Period;

                  (b)      Calculation of Net Sales for the applicable Royalty
Period;

                  (c)      Total Net Sales in Japanese Yen for the applicable
Royalty Period, together with the Exchange Rates used for conversion; and

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       7.
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                                                                    Confidential

                  (d)      Calculation of the royalty amount payable to Tosoh
for the applicable Royalty Period.

If no running royalties are due Tosoh for a Royalty Period, the royalty report
shall so state. All royalty reports shall be maintained in strict confidence by
Tosoh.

         3.7      BOOKS OF ACCOUNTS AND RECORDS. Gen-Probe shall keep, and shall
cause its Affiliates to which sublicenses have been granted under Section 2.2
hereof to keep, for a period of three (3) years after the close of each fiscal
year of Gen-Probe and such Affiliates, complete, true and accurate books of
account and other records containing all information and data which may be
necessary to ascertain and verify the amount of running royalties payable to
Tosoh hereunder, including, without limitation, detailed backup for the
computations of Net Sales. During the term of this Agreement and for a period of
two (2) years thereafter, Tosoh shall have the right (which Tosoh may not
exercise more than once during each fiscal year) to cause an independent public
accounting firm selected by Tosoh and acceptable to Gen-Probe to inspect, at
Tosoh's own cost, the books and records of Gen-Probe and its Affiliates to which
sublicenses have been granted for the sole purpose of determining the accuracy
of the royalty report and calculation of running royalties. Such inspection
shall be made during normal business hours of Gen-Probe and such Affiliates and
with at least thirty (30) day prior notice. All the information disclosed to or
obtained by the independent public accounting firm shall not be disclosed to
anyone including Tosoh (except as required by applicable law or by any court,
governmental agency or regulatory authority) and shall be held in strict
confidence, except that the independent public accounting firm may disclose to
Tosoh whether any discrepancy in running royalties payment has been found and
the amount of such discrepancy.

         3.8      LATE PAYMENTS. In the event that any amount due Tosoh by
Gen-Probe hereunder is not paid when due, Gen-Probe shall on Tosoh's demand pay
to Tosoh interest on overdue amount at the rate of [...***...] per annum from
the due date of such amount until the date such overdue payment is actually
received by Tosoh.

                                   ARTICLE IV

                      REPRESENTATIONS AND WARRANTIES, ETC.

         4.1      LEGAL RIGHT. Each Party represents and warrants that it has
all requisite power, authority and legal right to enter into this Agreement, and
to perform its obligations set forth herein.

         4.2      AUTHORIZATION. Each Party represents and warrants that the
execution, delivery and performance by it (a) have been duly authorized by all
necessary corporate or other actions of it, and (b) do not contravene, conflict
with or result in a breach of any permit, authorization or license, any charter
or any other organizational document, or any law, regulation, judgment, order,
agreement or legal or contractual obligations or restriction binding on or
otherwise affecting it.

         4.3      REQUIRED ACTIONS. Each Party represents and warrants that all
acts, conditions and things required to be done, fulfilled and performed by it
in order (a) to enable it to lawfully

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       8.
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enter into or to perform its obligations under this Agreement, (b) to ensure
that its obligations under this Agreement are legal, valid and binding and (c)
to make this Agreement enforceable and admissible in evidence, have been done,
fulfilled and performed and will be done, fulfilled and performed.

         4.4      TOSOH PATENT RIGHTS. Tosoh represents and warrants that it has
the full legal power and right to grant the licenses and rights under the Tosoh
Patent Rights as set forth in this Agreement.

         4.5      NO CLAIM. Tosoh represents and warrants that there are no
claims, actions, suits, or proceedings pending or, to the knowledge of Tosoh,
threatened against or affecting the Tosoh Patent Rights before any court,
governmental agency, regulatory authority, arbitral tribunal or other body.

         4.6      DISCLAIMER. Except otherwise expressly represented and
warranted hereunder, the licenses and rights herein granted by Tosoh to
Gen-Probe are provided WITHOUT WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED. TOSOH MAKES NO
REPRESENTATION OR WARRANTY THAT THE LICENSED PRODUCTS OR LICENSED METHOD WILL
NOT INFRINGE ANY PATENT OR PROPRIETARY RIGHT OF OTHERS. NOTHING IN THIS
AGREEMENT SHALL BE CONSTRUED AS A REPRESENTATION OR WARRANTY MADE BY TOSOH THAT
ANY PATENT OR UTILITY MODEL WILL ISSUE BASED UPON ANY PENDING APPLICATION
THEREFOR OR THAT ANY PATENT OR UTILITY MODEL IS OR WILL BE VALID.

         4.7      LIMITATION OF LIABILITY. IN NO EVENT SHALL EITHER PARTY BE
LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL
DAMAGES, LOSSES, COSTS OR EXPENSES OF ANY KIND, HOWEVER CAUSED ON ANY THEORY OF
LIABILITY AND WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE),
INCLUDING LOST PROFITS OR REVENUES AND LOSS OF GOODWILL, REGARDLESS OF WHETHER
SUCH PARTY KNOWS OR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR
LOSSES.

                                   ARTICLE V

                                 INDEMNIFICATION

         5.1      INDEMNIFICATION BY GEN PROBE. Subject to the provisions of
Section 4.7, Gen-Probe shall indemnify, defend, and hold harmless Tosoh and its
Affiliates and their directors, officers, employees, and agents and their
respective successors and permitted assigns against any and all claims, suits,
losses, liability, damages, or expenses (including reasonable attorney's fees
and expenses of litigation) resulting from or arising out of the exercise by
Gen-Probe and its Affiliates of the licenses and rights granted herein under the
Tosoh Patent Rights including any manufacture, use or sale of a Licensed Product
or practice of a Licensed Method. This indemnification shall include, but not be
limited to, any product liability.

                                       9.
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                                                                    Confidential

         5.2      PROCEDURES. In the event that any such claim, action or demand
is made against Tosoh, Tosoh shall promptly upon becoming aware of any such
claim, demand or suit, notify in writing as to the nature and particulars of the
same, promptly furnish Gen-Probe with copies of any and all documents (inclusive
of all correspondence and pleadings other than attorney-client communications)
pertaining thereto, and provide Gen-Probe at the cost of Gen-Probe with
reasonable cooperation for Gen-Probe to mitigate a loss or damage arising from
any such claim, demand or suit. Tosoh shall also keep Gen-Probe continuously and
fully informed in a timely manner as to the status of the same and shall provide
Gen-Probe with copies of any additional documents pertaining thereto in a timely
manner. The obligations of Gen-Probe under Section 5.1 shall be contingent upon
(a) Tosoh giving prompt written notice to Gen-Probe of any indemnified claim,
action or demand as provided above, (b) Tosoh allowing Gen-Probe to control the
defense and related settlement negotiations, including the selection of one
attorney or law firm to represent Tosoh (who may also be Tosoh's attorney or law
firm), and (c) Tosoh fully assisting in the defense so long as Gen-Probe agrees
to pay Tosoh's out of pocket expenses.

                                   ARTICLE VI

                              TERM AND TERMINATION

         6.1      TERM. This Agreement shall commence on the Effective Date and
shall remain in effect until the last patent in Tosoh Patent Rights to expire,
unless earlier terminated as provided in this Article VI.

         6.2      MATERIAL BREACH BY GEN PROBE. If Gen-Probe violates or fails
to perform any material term or covenant of this Agreement, Tosoh may give
written notice of such default to Gen-Probe. If Gen-Probe fails to take
appropriate steps to cure such default within sixty (60) days of the effective
date of such notice of default, Tosoh shall have the right to terminate this
Agreement by issuing a written notice of termination to Gen-Probe without
prejudice to any rights or remedies available under this Agreement, at law or in
equity.

         6.3      MATERIAL BREACH BY TOSOH. If Tosoh violates or fails to
perform any material term or covenant of this Agreement, Gen-Probe may give
written notice of such default to Tosoh. If Tosoh fails to take appropriate
steps to cure such default within sixty (60) days of the effective date of such
notice of default, Gen-Probe shall have the right to (a) continue this Agreement
in full force and effect, or (b) terminate this Agreement as a whole by issuing
a written notice of termination to Tosoh. In all events, Gen-Probe may pursue
all available remedies under this Agreement, at law or equity against Tosoh by
reason of such breach.

         6.4      SURVIVAL. The following shall survive the expiration or
termination of this Agreement:

                  (a)      Gen-Probe's obligations to pay running royalties that
have accrued prior to termination; and

                  (b)      The provisions of Sections 3.7, 4.6, 4.7, 5.1, 5.2,
8.1, 9.2, 9.7, 9.8, 9.11, 9.12 and this Section 6.4.

                                      10.
<PAGE>

                                                                    Confidential

                                  ARTICLE VII

                                 PATENT MARKING

         7.1      PATENT MARKING. If reasonably requested by Tosoh, Gen-Probe
agrees to mark a container or insert therein containing a Licensed Product under
the Tosoh Patent Rights manufactured by Gen-Probe or its Affiliates hereunder
with such patent notice as may be required by the laws of a country where such
Licensed Product is sold.

                                  ARTICLE VIII

                                   ARBITRATION

         8.1      ARBITRATION. In the event of any Dispute, the Parties shall
seek to settle their differences amicably between themselves, including entering
into non-binding mediation. Any unresolved Dispute shall be resolved by final
and binding arbitration in accordance with this Article. Whenever a Party shall
decide to institute arbitration proceedings, it shall give written notice to
that effect to the other Party. The Party giving such notice shall refrain from
instituting the arbitration proceedings for a period of ten (10) days following
such notice to allow the Parties to attempt to resolve the Dispute. If the
Parties are still unable to resolve the Dispute, the Party giving notice may
institute the arbitration proceedings under the rules of Arbitration of the
International Chamber of Commerce as then in effect (the "ICC RULES").
Arbitration shall be held in The Hague, Netherlands. The arbitration shall be
conducted in English before three arbitrators, with each Party to select one
arbitrator and with the third arbitrator to be appointed in accordance with the
ICC Rules. The arbitrators shall not have the power to award punitive damages or
any award of multiple damages under this Agreement and such awards are expressly
prohibited. Any arbitration award shall be final and binding on the Parties.
Judgment on the award may be entered in any court having jurisdiction. Nothing
contained in this Article shall prevent either Party from seeking temporary
restraining orders, temporary or permanent injunctions or such other relief in
any court of competent jurisdiction.

                                   ARTICLE IX

                                  MISCELLANEOUS

         9.1      ASSIGNMENT. Neither Party to this Agreement shall have the
right to assign, delegate or otherwise transfer any rights or obligations under
this Agreement without the prior written consent of the other Party, which shall
not be unreasonably withheld. Any such purported transfer without such prior
written consent shall be deemed void and without effect.

         9.2      GOVERNING LAW. This Agreement will be construed and governed
by the laws of Japan, without giving effect to conflict of law provisions.

         9.3      COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, and all of which
together shall be deemed to be one and the same instrument.

                                      11.
<PAGE>

                                                                    Confidential

         9.4      NO THIRD PARTY BENEFITS. Nothing in this Agreement, express or
implied, is intended to confer on any person other than the Parties and their
Affiliates or their respective successors or permitted assigns, any benefits,
rights or remedies.

         9.5      HEADINGS. All headings in this Agreement are for convenience
only and shall not affect the meaning of any provision hereof.

         9.6      BINDING EFFECT. This Agreement shall inure to the benefit of
and be binding upon the Parties and their Affiliates and their respective
successors and assigns.

         9.7      COMPLIANCE WITH LAW. Nothing contained in this Agreement shall
be construed so as to require the commission of any act contrary to law, and
wherever there is any conflict between any provision of this Agreement and any
statute, law, ordinance or treaty, the latter shall prevail, but in such event
the affected provisions of the Agreement shall be conformed and limited only to
the extent necessary to bring it within the applicable legal requirements.

         9.8      NOTICES. All notices, requests, demands and other
communications required or permitted to be given pursuant to this Agreement
shall be in writing and in English, and shall be deemed to have been duly given
upon the date of receipt if delivered by hand, recognized international
overnight courier, confirmed facsimile transmission, or registered or certified
mail, return receipt requested, postage prepaid to the following addresses or
facsimile numbers:

           If to Tosoh:                         If to Gen-Probe:

           Tosoh Corporation                    Gen-Probe Incorporated
           3-8-2, Shiba, Minato-ku              10210 Genetic Center Drive
           Tokyo 105 8623                       San Diego, California 92121-4362
           Japan                                U.S.A.
           Attn: Senior General Manager         Attn: Chairman
                 Scientific Instruments
                 Division
           Facsimile:  [...***...]

Either Party may change its designated address and facsimile number by notice to
the other Party in the manner provided in this Section.

         9.9      AMENDMENT AND WAIVER. This Agreement may be amended,
supplemented, or otherwise modified only by means of a written instrument signed
by both Parties. Any waiver of any rights or failure to act in a specific
instance shall relate only to such instance and shall not be construed as an
agreement to waive any rights or fail to act in any other instance, whether or
not similar.

         9.10     SEVERABILITY. In the event that any provision of this
Agreement shall, for any reason, be held to be invalid, or unenforceable in any
respect, such invalidity or unenforceability shall not affect any other
provision hereof, and the Parties shall negotiate in good faith to modify the
Agreement to preserve (to the extent possible) their original intent.

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      12.
<PAGE>

                                                                    Confidential

         9.11     ATTORNEYS' FEES. If either Party commences an arbitration or
other action against the other Party to enforce any of the terms hereof or
because of the material breach by such other Party of any of the terms or
covenants hereof, the prevailing Party shall be entitled, in addition to any
other relief granted, to all reasonable out-of-pocket costs and expenses
incurred by the prevailing Party in connection with such action, including,
without limitation, all reasonable attorneys' fees, and a right to such costs
and expenses shall be deemed to have accrued upon the commencement of such
action and shall be enforceable whether or not such action is prosecuted to
judgment.

         9.12     CONFIDENTIALITY. Except as required by law or a court or
administrative order, the terms of this Agreement and all information disclosed
hereunder and designated as confidential shall be considered as confidential
information of the disclosing Party and the receiving Party shall use the same
care to protect such information as it uses to protect its own confidential
information of like kind. This confidentiality obligation shall not apply:

                  (a)      to information which was generally available to the
public at the time of disclosure, or information which becomes available to the
public after disclosure by the disclosing Party other than through fault of the
receiving Party; or

                  (b)      to information which has been already known to the
receiving Party prior to its receipt from the disclosing Party; or

                  (c)      to information which is obtained at any time lawfully
from a third party under circumstances permitting its disclosure to others; or

                  (d)      to information which is developed independently by
the receiving Party other than through knowledge of the information received
from the disclosing Party.

         Notwithstanding the foregoing, promptly after the execution of this
Agreement the Parties shall agree upon the substance of information that can be
used to describe the terms of the transaction contemplated by this Agreement so
that the Parties can disclose such information, as may be modified by mutual
written agreement from time to time, without the other party's consent.

         9.13     ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement between the Parties with respect to the subject matter hereof.

         9.14     PRESS RELEASE. Neither Party hereto shall issue any press
release or other public announcement relating to this Agreement without
obtaining the other Party's written approval, which will not be unreasonably
withheld.

                                      13.
<PAGE>

                                                                    Confidential

         IN WITNESS WHEREOF, the undersigned have duly executed and delivered
this Agreement as a sealed instrument effective as of the date first above
written.

TOSOH CORPORATION

By: /s/ Madoka Tashiro
    -------------------------------------
     Madoka Tashiro
     Chief Executive Officer and Chairman

GEN-PROBE INCORPORATED

By: /s/ Henry L. Nordhoff
    -------------------------------------
     Henry L. Nordhoff
     Chief Executive Officer and Chairman

                                      14.
<PAGE>

                                                                    Confidential

                                    EXHIBIT A

                                   [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

                                                                    Confidential

                                    EXHIBIT B

                                   [...***...]

                                   [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED<PAGE>

                                                                   EXHIBIT 10.55

                                            ***TEXT OMITTED AND FILED SEPARATELY
                                                CONFIDENTIAL TREATMENT REQUESTED
                                           UNDER 17 C.F.R. SECTIONS 200.80(b)(4)
                                                                   AND 240.24B-2

                              TMA LICENSE AGREEMENT

                                     BETWEEN

                             GEN-PROBE INCORPORATED

                                       AND

                                TOSOH CORPORATION

                         EFFECTIVE AS OF JANUARY 1 2004

                                       1.
<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                          PAGE
<S>                                                                                       <C>
ARTICLE I         DEFINITIONS.........................................................      1

ARTICLE II        GRANT OF RIGHTS.....................................................      6

     2.1     Grant of License Under Gen-Probe Patent Rights...........................      6

     2.2     Grant of Sublicense Under Stanford Patent Rights.........................      6

     2.3     Sublicensing.............................................................      6

     2.4     Grant of Benefit of Immunity Under Teknika Patent Rights, etc............      6

     2.5     Limitation on Scope of Grant.............................................      7

     2.6     Ownership, etc...........................................................      7

ARTICLE III       LICENSE FEES AND RUNNING ROYALTIES..................................      7

     3.1     License Fee..............................................................      7

     3.2     Running Royalties........................................................      8

     3.3     Accrual of Running Royalties.............................................      8

     3.4     [...***...]..............................................................      9

     3.5     Running Royalties Payments...............................................      9

     3.6     Withholding Taxes........................................................      9

     3.7     Royalty Reports..........................................................      9

     3.8     Books of Accounts and Records............................................     10

     3.9     Late Payments............................................................     10

     3.10    Running Royalties Payable to Stanford....................................     10

     3.11    Third Party Additional Royalties.........................................     10

     3.12    Infringement of Patents owned by Third Party.............................     11

ARTICLE IV        GRANTBACK...........................................................     12

     4.1     Grant of License Under Tosoh Derivative Patent Rights....................     12

     4.2     No Further License.......................................................     13

     4.3     Infringement of Patents owned by Third Party.............................     13

ARTICLE V         REPRESENTATION AND WARRANTIES, ETC..................................     13

     5.1     Legal Right..............................................................     13

     5.2     Authorization............................................................     13

     5.3     Required Actions.........................................................     13

     5.4     Gen-Probe Patent Rights..................................................     14
</TABLE>

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      -i-

<PAGE>

                                TABLE OF CONTENTS
                                   (CONTINUED)

<TABLE>
<CAPTION>
                                                                                          PAGE
<S>                                                                                       <C>
     5.5     Stanford Patent Rights...................................................     14

     5.6     Teknika Patent Rights....................................................     14

     5.7     No Claim.................................................................     14

     5.8     Disclaimer...............................................................     14

     5.9     Limitation of Liability..................................................     15

[...***...]  [...***...]..............................................................     15

     6.1     [...***...]..............................................................     15

ARTICLE VII       INDEMNIFICATION.....................................................     15

     7.1     Indemnification by TOSOH.................................................     15

     7.2     Indemnification by GEN-PROBE.............................................     16

     7.3     Obligations of the Indemnified Party.....................................     16

ARTICLE VIII      TERM AND TERMINATION................................................     16

     8.1     Original Term............................................................     16

     8.2     Extended Term............................................................     17

     8.3     Extended Term for Teknika................................................     17

     8.4     Material Breach By TOSOH.................................................     17

     8.5     Material Breach by GEN-PROBE.............................................     17

     8.6     Survival.................................................................     18

ARTICLE IX        PATENT MARKING......................................................     18

     9.1     Patent Marking...........................................................     18

ARTICLE X         ARBITRATION.........................................................     18

     10.1    Arbitration..............................................................     18

ARTICLE XI        MISCELLANEOUS.......................................................     19

     11.1    Assignment...............................................................     19

     11.2    Governing Law............................................................     19

     11.3    Counterparts.............................................................     19

     11.4    No Third Party Benefits..................................................     19

     11.5    Headings.................................................................     19

     11.6    Binding Effect...........................................................     19

     11.7    Compliance With Law......................................................     19
</TABLE>

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      -ii-

<PAGE>

                                TABLE OF CONTENTS
                                   (CONTINUED)

<TABLE>
<CAPTION>
                                                                                          PAGE
<S>                                                                                       <C>
     11.8    Notices..................................................................     19

     11.9    Amendment and Waiver.....................................................     20

     11.10   Severability.............................................................     20

     11.11   Attorneys' Fees..........................................................     20

     11.12   Calculation of "Net Sales" In Other License Agreements Between Parties...     20

     11.13   Confidentiality..........................................................     20

     11.14   Entire Agreement.........................................................     21

     11.15   Press Release............................................................     21
</TABLE>

<TABLE>
<S>           <C>
Exhibit A     GEN-PROBE Patents

Exhibit B     [...***...]

Exhibit C     Conditions of Sublicense under the Stanford Patent Rights

Exhibit D     Conditions of Immunity and Non-Assertion under the Teknika Patent Rights

Exhibit E     GEN-PROBE Products
</TABLE>

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      -iii-
<PAGE>

                              TMA LICENSE AGREEMENT

         THIS TMA LICENSE AGREEMENT (this "AGREEMENT"), effective as of January
1, 2004 ("EFFECTIVE DATE"), is by and between the following parties:

GEN-PROBE INCORPORATED, a corporation duly organized under the laws of the State
of Delaware, having its principal place of business at 10210, Genetic Center
Drive, San Diego, California, 92121-4362, U.S.A. ("GEN-PROBE"), and

TOSOH CORPORATION a corporation duly organized under the laws of Japan, having
Its principal place of business at 3-8-2, Shiba, Minato-ku, Tokyo, 105-8623,
Japan ("TOSOH").

                                    PREAMBLE

         A.       GEN-PROBE has developed proprietary technology relative to the
amplification of genetic targets for use in nucleic acid tests for the detection
of infectious diseases, cancers, and microorganisms (including without
limitation viruses), referred to as the Transcription Mediated Amplification
Method (the "TMA METHOD") as more fully defined below, and has the right to
grant licenses under the Gen-Probe Patent Rights as defined below.

         B.       TOSOH has developed proprietary technology relative to the
amplification of genetic targets for use in nucleic acid tests for the detection
of infectious diseases, cancers, and microorganisms (including without
limitation viruses), referred to as the Transcription Reverse-transcription
Concerted Amplification Method (the "TRC METHOD").

         C.       TOSOH desires to obtain from GEN-PROBE a license to develop,
make, have made, use, sell or offer for sale Licensed Products as defined below,
and practice Licensed Methods as defined below.

         D.       GEN-PROBE is willing to grant such a license on the terms and
conditions provided herein.

         NOW, THEREFORE, in consideration of the mutual covenants set forth
hereinafter, the parties hereby agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

         For purposes of this Agreement, except as otherwise expressly provided
herein or unless the context herein otherwise requires, the terms defined in
this Article shall have the meanings specified below:

         1.1      "AFFILIATE" shall mean a corporation or other legal entity,
that controls, is controlled by or is under common control with either Party
directly or indirectly through one or more intermediaries. For purposes of this
definition, "control" means the legal or beneficial ownership, directly or
indirectly, of more than fifty percent (50%) of the outstanding equity
securities of a corporation which are entitled to vote in the election of
directors or persons

                                       1.
<PAGE>

                                                                    Confidential

performing similar functions, or of more than fifty percent (50%) interest in
the net assets or profits of an entity which is not a corporation; provided that
such corporation or entity shall be deemed to be an Affiliate for purposes of
this Agreement only so long as such Party maintains such ownership or control.
Notwithstanding the foregoing, if, due to compliance by either Party with the
requirements imposed by a foreign investment law or similar law, such Party is
not able to own more than fifty percent (50%) of the outstanding shares of a
joint venture company established in the country of such law, such Party shall
be entitled to regard a joint venture company of which it owns fifty percent
(50%) or less of such shares to be its Affiliate as long as such Party has the
veto power to the decisions of major corporate matters of such joint venture
company, upon written prior notice to the other Party as to the name of such
joint venture and the requirements of such law, together with documentary proof
of such requirements.

         1.2      "CALENDAR YEAR" shall mean a calendar year commencing on
January 1 and ending on December 31.

         1.3      "DISPUTE" shall mean any dispute, controversy or claim between
the Parties relating to, arising out of, or in any way connected to any
provision of this Agreement or any ancillary agreements hereto.

         1.4      "EFFECTIVE DATE" shall mean the date first set forth above.

         1.5      "END-POINT DETECTION" shall mean a qualitative detection
method the results of which can be determined by reference to a measurement
taken from a sample at a single time point.

         1.6      "EXCHANGE RATE" shall mean, with respect to any amount to be
converted from a foreign currency to U.S. dollars hereunder, the TTS rate quoted
by the Bank of Tokyo-Mitsubishi, Limited, Tokyo, Japan on the closing of the
last banking day in Tokyo of a Royalty Period.

         1.7      "FIELD" shall mean the field of [...***...].

         1.8      "FIRST COMMERCIAL SALE" shall mean the first sale by TOSOH or
its Affiliate of any Licensed Product or the first practice by TOSOH or its
Affiliate of any Licensed Method for consideration (and not for demonstration,
government approval, testing or promotional purposes), whichever is earlier.

         1.9      "GEN-PROBE PATENT RIGHTS" shall mean (a) the patents and
patent applications identified in EXHIBIT A hereto; (b) any other patents,
utility models and applications therefor, now or hereafter owned or acquired by
Gen-Probe and/or its Affiliates during the Term, the claims of which would be
infringed by (i) the Licensed Products (to the extent practicing any

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       2.
<PAGE>

                                                                    Confidential

TMA Method) or (ii) the use or practice of any TMA Method, in each case under
which Gen-Probe and/or its Affiliates have the right to grant licenses, subject
to the provisions of Section 3.11; (c) all reissues, reexaminations, renewals
and extensions, continuations, continuations-in-part, amendments and divisions
of any of the foregoing patents or patent applications in (a) and (b) above; (d)
any other patents, utility models and applications therefor claiming priority
from any of the foregoing patents, utility models and patent applications in
(a), (b) and (c) above, in whole or in part and (e) any additional patent
licenses offered and accepted in accordance with Section 3.11 hereof. As used
herein, "Gen-Probe Patent Rights" shall not include rights to specific nucleic
acid sequences claimed by any of the above patents and utility models and
applications therefor.

         1.10     "ISSUED VALID CLAIM" shall mean any claim of the issued and
unexpired patents included within the Gen-Probe Patent Rights that has not been
held unenforceable or invalid by any court, governmental agency, regulatory
authority, arbitral tribunal or other body of competent jurisdiction in any
unappealable or unappealed decision.

         1.11     "LABORATORY LICENSE AGREEMENT" shall mean any license
agreement or contract between GEN-PROBE (or any of its Affiliates) and a third
party laboratory, institution or other entity performing medical research,
clinical studies or other services, for internal use or for use by third
parties, under which GEN-PROBE grants a license under the Gen-Probe Patent
Rights to research, develop, or make (but not sell or have sold) products
(otherwise falling under the definition of Licensed Products).

         1.12     "LICENSED METHOD" shall mean the TMA Method or any method
(other than the TEKNIKA Version as defined on EXHIBIT D to the extent that such
version is protected by the Teknika Patent Rights), the practice of which would
constitute, but for the license granted herein, an infringement of any Issued
Valid Claim of the Gen-Probe Patent Rights.

         1.13     "LICENSED PRODUCT" shall mean:

                  (c)      Any product that is specifically intended for use in
practicing a Licensed Method;

                  (c)      Any product that lacks a substantial use other than
in practicing a Licensed Method; and

                  (c)      Any product, the development, making, using, selling,
offering for sale or disposal of which would constitute, but for the license
granted herein, an infringement of any Issued Valid Claim of the Gen-Probe
Patent Rights,

provided, however, that to the extent that the license granted hereunder by
GEN-PROBE to TOSOH specifically excludes assay products for detection of the
targets identified on EXHIBIT B hereto, as more fully set forth in Section 2.1
hereof, such assay products for detection of the targets identified on EXHIBIT B
hereto shall also be excluded from the definition of Licensed Product.

         1.14     "NET SALES" shall mean the aggregate amount of revenue in U.S.
Dollars (converted as necessary for sales made in a currency other than U.S.
Dollars into U.S. Dollars at

                                       3.
<PAGE>

                                                                    Confidential

the applicable Exchange Rate in accordance with the definition of "Exchange
Rate" above) received or receivable by TOSOH and/or its Affiliates with respect
to all Licensed Products sold or otherwise disposed of and all Licensed Methods
practiced by TOSOH or its Affiliates for consideration during a Royalty Period
(for any such Licensed Product sold or otherwise disposed of, or Licensed Method
practiced for consideration other than cash, the sales price shall be deemed to
be the average price at which identical or similar (after reasonable
adjustments) Licensed Products or Licensed Methods sold or practiced by TOSOH or
its Affiliates during the same Royalty Period in "arms-length" transactions),
less only the following:

                  (a)      the total amount of all credits and allowances
reasonably granted by TOSOH and its Affiliates (if any) for such Licensed
Products and Licensed Methods during such Royalty Period on account of refunds,
price reductions, price discounts or rebates, whether arising out of recalls,
rejections, returns or otherwise relating to Licensed Products sold or Licensed
Method practiced prior to such Royalty Period (and for which royalties were
previously paid hereunder);

                  (b)      the total amount of all excise taxes, sales taxes,
value added taxes, consumption taxes, customs duties and other taxes or duties
(excluding income taxes or franchise taxes) imposed with respect to such
Licensed Products sold and such Licensed Method practiced;

                  (c)      the total amount of all separately itemized
transportation charges (including packing, insurance, and freight costs)
actually incurred in connection with the sales of such Licensed Products and
practice of Licensed Method; and

                  (d)      the portion of the revenues received or receivable of
the Licensed Products (to the extent previously included in the calculation of
"Net Sales" above) reasonably allocable to recovery of costs of the rented
instruments, analyzers or similar equipment pursuant to "reagent/rental"
programs or comparable sale or lease programs (including instrument
upgrade/maintenance programs).

         1.15     "PARTY" or "PARTIES" means, in the singular, GEN-PROBE or
TOSOH and in the plural, GEN-PROBE and TOSOH.

         1.16     "ROYALTY PERIOD" shall mean a [...***...].

         1.17     "SEMI-ANNUAL PERIOD" shall mean, for each calendar year, a six
month period beginning on each January 1 or July 1, without regard to whether
such dates are otherwise business days.

         1.18     "STANFORD" shall mean the Board of the Trustees of the Leland
Stanford Junior University and its successors and assigns of the Stanford
License Agreement.

         1.19     "STANFORD LICENSE AGREEMENT" shall mean that certain
Co-Exclusive Agreement effective as of April 23, 1997 entered into by and
between Stanford and GEN-PROBE as amended by Amendment No. 1 effective as of
April 24, 1998, as the same may be further amended, supplemented, revised or
modified from time to time.

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       4.
<PAGE>

                                                                    Confidential

         1.20     "STANFORD PATENT RIGHTS" shall mean US Patent No. 5,437,990
and any letters patent issued upon US Patent Application, Serial Number 080,479
filed on July 31, 1987 with respect to the technique of Selective Amplification
of Targets Polynucleotide Sequences owned by Stanford, any foreign patents
corresponding thereto, and/or any divisions, continuations, or
continuations-in-part, or reissue thereof, under which GEN-PROBE has the right
to grant sublicenses.

         1.21     "TEKNIKA" shall mean Organon Teknika B.V. (presently
bioMerieux B.V.) and its successors and assigns of the Teknika Non-Assertion
Agreement.

         1.22     "TEKNIKA NON-ASSERTION AGREEMENT" shall mean that certain
Non-Assertion Agreement effective as of February 7, 1997 entered into by and
between Teknika and GEN-PROBE, as the same may be amended, supplemented, revised
or modified from time to time.

         1.23     "TEKNIKA PATENT RIGHTS" shall mean the patents and patent
applications set forth in EXHIBIT D hereto under heading "Teknika Patent
Rights," together with any unlisted patents and patent applications from which
any of the listed patents claim priority, and any and all patents that have
issued or in the future issue from the foregoing patents and patent
applications, including utility models and design patents and certificates of
invention, and all divisions, continuations, continuations-in-part, reissues,
renewals, extensions or additions thereof claiming priority from any of the
foregoing patents or patent applications heretofore or hereafter having legal
force in any country to the extent that Teknika has the right to grant licenses,
immunities, or rights thereunder or to assert rights thereunder, and under which
GEN-PROBE has the right to grant immunities and non-assertions to its licensees.

         1.24     "TERM" shall mean the term of this Agreement set forth in
Section 8.1, as may be extended pursuant to Section 8.2 or 8.3 hereof.

         1.25     "TERRITORY" shall mean countries in which Gen-Probe Patent
Rights has issued and any application therefor has been filed.

         1.26     "TMA METHOD" shall mean [...***...].

         1.27     "TOSOH DERIVATIVE PATENT RIGHTS" shall mean all the patents
and utility models and applications therefor hereafter owned or acquired by
TOSOH and/or its Affiliates during the Term that claim inventions, discoveries
or improvements made by TOSOH and/or its Affiliates through the practice of the
Gen-Probe Patent Rights, the claims of which would be infringed by any products
practicing the TMA Method or the use or practice of the TMA Method, to the
extent that TOSOH and/or its Affiliates have the right to grant licenses. For
the avoidance of doubt, "Tosoh Derivative Patent Rights" shall not include
rights to specific nucleic acid sequences claimed by any of the above patents
and utility models and applications therefor.

         1.28     "UNITED STATES" shall mean the United States of America, its
territories and possessions.

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       5.
<PAGE>

                                                                    Confidential

         1.29     "U.S. DOLLAR" or "US$" shall mean the lawful currency of the
United States. All references in this Agreement to monetary amounts shall be to
U.S. dollars unless otherwise stated.

                                   ARTICLE II
                                 GRANT OF RIGHTS

         2.1      GRANT OF LICENSE UNDER GEN-PROBE PATENT RIGHTS. Subject to the
terms and conditions of this Agreement, GEN-PROBE hereby grants TOSOH, and TOSOH
hereby accepts, a non-exclusive, non-transferable, royalty-bearing license under
the Gen-Probe Patent Rights to develop, make, have made, use, import, offer for
sale, sell, have sold or otherwise dispose of Licensed Products in the Field in
the Territory, and to practice Licensed Methods in the Field in the Territory;
provided, however, that such license grant by Gen-Probe specifically excludes
assay products for detection of the targets identified on EXHIBIT B hereto, as
long as and to the extent that Bayer Corporation has the exclusive distribution
rights with respect to such assay products pursuant to a certain Agreement dated
June 11, 1998 entered into by and between GEN-PROBE and Chiron Corporation,
which is the predecessor in interest to Bayer Corporation with respect to such
distribution rights. In the event that Bayer Corporation loses such exclusive
distribution rights, GEN-PROBE shall immediately notify TOSOH of such event in
writing, and such exclusion shall automatically cease and such assay products
shall automatically be included in the license granted hereunder and in the
definition of the "Licensed Products."

         2.2      GRANT OF SUBLICENSE UNDER STANFORD PATENT RIGHTS. Subject to
the terms and conditions of this Agreement and particularly EXHIBIT C hereof,
GEN-PROBE hereby grants TOSOH, and TOSOH hereby accepts, a non-exclusive,
non-transferable, royalty-bearing sublicense under the Stanford Patent Rights
within the scope of the license granted by Stanford to GEN-PROBE, to develop,
make, have made, use, offer for sale, sell, have sold or otherwise dispose of
Licensed Products in the Field, and to practice Licensed Methods in the Field,
in any country where any of the Stanford Patent Rights has issued and any
application therefor has been filed. In the event that the Stanford License
Agreement is terminated for any reason, such rights granted by GEN-PROBE to
TOSOH under this Section 2.2 shall continue with Stanford, provided that TOSOH
assumes the obligations of GEN-PROBE under the Stanford License Agreement.

         2.3      SUBLICENSING. TOSOH shall have the right to sublicense to its
Affiliates the licenses granted by GEN-PROBE to TOSOH under Sections 2.1 and 2.2
above but without any right to sublicense further. TOSOH shall not have the
right to grant a sublicense to any party other than its Affiliates under the
Gen-Probe Patent Rights without the prior written consent of GEN-PROBE. Nor
shall TOSOH have the right to grant a sublicense to any party other than its
Affiliates under the Stanford Patent Rights without the prior written consent of
Stanford and GEN-PROBE.

         2.4      GRANT OF BENEFIT OF IMMUNITY UNDER TEKNIKA PATENT RIGHTS, ETC.
Subject to the terms and conditions of this Agreement and particularly EXHIBIT D
hereof, as long as TOSOH remains the licensee of GEN-PROBE hereunder, GEN-PROBE
hereby grants TOSOH and its Affiliates, and TOSOH for itself and on behalf of
its Affiliates hereby accepts, the benefits obtained from Teknika of such
immunity and non-assertion under the Teknika Patent

                                       6.
<PAGE>

                                                                    Confidential

Rights and any other patent rights owned and acquired by Teknika as set forth in
the Teknika Non-Assertion Agreement, which shall be given to Licensed Products
developed, made, had made, used, offered for sale, sold, had sold or otherwise
disposed of in the Field, and Licensed Methods practiced in the Field under this
Agreement. In the event the Teknika Non-Assertion Agreement is terminated by
Teknika due to GEN-PROBE's fault, the benefits granted by GEN-PROBE to TOSOH and
its Affiliates under this Section 2.4 shall continue with Teknika, provided that
TOSOH in writing assumes the obligations of GEN-PROBE under the Teknika
Non-Assertion Agreement at least ninety (90) days prior to the termination of
the Teknika Non-Assertion Agreement, such termination and date thereof to be
immediately notified by GEN-PROBE to TOSOH in writing.

         2.5      LIMITATION ON SCOPE OF GRANT. For a period of [...***...]
following the Effective Date, the license and benefit of immunity granted to
TOSOH under the terms of Sections 2.1 through 2.4 above expressly excludes the
right to make, have made, use, offer for sale, sell, have sold or otherwise
dispose of Licensed Products for practicing the TMA Method with End-Point
Detection or to practice the TMA method with End-Point Detection. Following the
expiration of such [...***...] period, the grant of such license and benefit of
immunity expressly excludes the right to make, have made, use, offer for sale,
sell, have sold or otherwise dispose of Licensed Products for practicing the TMA
Method with End-Point Detection or to practice the TMA Method with End-Point
Detection with respect to any Licensed Product or Licensed Method that competes
with any of the GEN-PROBE products in existence as of the Effective Date as set
forth in EXHIBIT E hereof (including any subsequent versions of such products,
packaging or part numbers of such products).

         2.6      OWNERSHIP, ETC. GEN-PROBE shall retain the unrestricted right
to use, and/or license for use for any purpose whatsoever Gen-Probe Patent
Rights inside or outside the Field, except that GEN-PROBE may not exercise such
right in contravention of, or in conflict with, the express terms and conditions
hereof. Except for the licenses and rights expressly granted hereunder, no
right, title, or interest in any discovery, invention or other technology, data
or information or any patent, copyright, trademark, or other intellectual
property rights therein owned by GEN-PROBE or its Affiliates shall be granted to
TOSOH under this Agreement. GEN-PROBE shall not be under any obligation to grant
to TOSOH any additional licenses and rights other than those granted hereby.

                                  ARTICLE III
                       LICENSE FEES AND RUNNING ROYALTIES

         3.1      LICENSE FEE. In consideration of the licenses and rights
granted herein, subject to Section 3.12(b)(1) below, TOSOH agrees to pay a
one-time, non refundable license fee of [...***...] to GEN-PROBE in accordance
with the following schedule:

                  (a)      three and one-half million U.S. dollars ($3,500,000)
to be due and payable within thirty (30) days of the Effective Date;

                  (b)      three and one-half million U.S. dollars ($3,500,000)
to be due and payable no later than December 31, 2004; and

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       7.
<PAGE>

                                                                    Confidential

                  (c)      [...***...].

         3.2      RUNNING ROYALTIES. In consideration of the licenses granted
under the Gen-Probe Patent Rights and the benefits of immunity and non-assertion
given under the Teknika Patent Rights, TOSOH further agrees to pay to GEN-PROBE
a royalty on the total Net Sales of all Licensed Products sold or otherwise
disposed of by TOSOH and its Affiliates for consideration and the Licensed
Methods practiced by TOSOH and its Affiliates for consideration during a Royalty
Period. Subject to the provisions of Section 8.2, running royalties shall be
paid at the flat rate of [...***...] on all sales or dispositions made for
consideration in the United States and at the following rates on all sales or
dispositions made for consideration outside the United States, depending on the
portions of the total Net Sales of such sales outside the United States.

<TABLE>
<CAPTION>
Royalty Rate                   Portion of Total Net Sales
------------                   --------------------------
<S>                         <C>
[...***...]                 Less than or equal to [...***...]
[...***...]                 More than [...***...]
[...***...]                 More than [...***...]
[...***...]                 More than [...***...]
</TABLE>

         3.3      ACCRUAL OF RUNNING ROYALTIES. Running royalties shall accrue
on Licensed Products or Licensed Methods only to the extent that TOSOH or its
Affiliates make, have made, use, sell, offer to sell, import or otherwise
dispose of such Licensed Products or practice such Licensed Method for
consideration in a country in which such act would infringe an Issued Valid
Claim in that country but for the license granted hereunder; provided, however,
that no royalty shall accrue with respect to a reasonable number of Licensed
Products sold or otherwise disposed by TOSOH for demonstration, government
approval, development, quality assurance, testing or promotional purposes. For
the avoidance of doubt:

                  (a)      Any running royalty shall not accrue with respect to
Licensed Products made, had made, used, imported, sold, offered for sale or
otherwise disposed of or Licensed Methods practiced, in a country in which (i)
there exists no Issued Valid Claim or (ii) such act would not infringe an Issued
Valid Claim in that country;

                  (b)      If and when Licensed Products are made or had made in
a country in which such act would infringe an Issued Valid Claim in that country
but for the license granted hereunder and sold or otherwise disposed of for
consideration in a country, whether or not there exists an Issued Valid Claim in
that country or whether or not such sales or disposal would not infringe an
Issued Valid Claim in that country, then the Net Sales of the sales and disposal
by TOSOH or its Affiliates of such Licensed Products to or in the country in
which the Licensed Products are sold or otherwise disposed of shall be used for
the purpose of calculating the running royalties.

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       8.
<PAGE>

                                                                    Confidential

                  (c)      If and when Licensed Products are made or had made in
a country in which such act would not infringe an Issued Valid Claim in that
country and sold or otherwise disposed of for consideration in a country in
which such act would infringe an Issued Valid Claim in that country, then the
Net Sales of the sales and disposal by TOSOH or its Affiliates of such Licensed
Products in the country in which the Licensed Products are sold or otherwise
disposed of shall be used for the purpose of calculating the running royalties.

                  (d)      No running royalties shall accrue at the time of the
transfer, sale or disposal of Licensed Products by TOSOH to any of its
Affiliates or by any of its Affiliates to another Affiliate. In such event,
running royalties shall accrue at the time of the sale or disposal of Licensed
Products by such Affiliate to any third party.

         3.4      [...***...].

         3.5      RUNNING ROYALTIES PAYMENTS. The running royalties accrued
under Section 3.2 above shall be paid by TOSOH on a Royalty Period basis.
Payments shall be made within [...***...] of the end of each Royalty Period. All
running royalties payable under Section 3.2 shall first be calculated in the
currency of sale and then converted into U.S. dollars based upon the Exchange
Rate, and shall be made in U.S. dollars without deduction of exchange fees and
bank commissions charged by the sending bank in Japan. Payments shall be made by
TOSOH to GEN-PROBE by wire transfer to the bank account as instructed by
GEN-PROBE in writing.

         3.6      WITHHOLDING TAXES. In the event that TOSOH is required to
withhold taxes imposed on any payment to GEN-PROBE hereunder by virtue of
applicable law or regulations in Japan and/or in a country in which its
Affiliate sublicensed hereunder is located, then such withholding tax shall be
paid by TOSOH to the appropriate tax authorities on a timely basis by deducting
it from the payment due GEN-PROBE, and TOSOH shall provide GEN-PROBE with
official documentation and/or tax receipt on such withholdings supporting such
payment of taxes as may be required by GEN-PROBE for its tax records. Upon
request by GEN-PROBE, TOSOH and GEN-PROBE shall cooperate in obtaining a reduced
tax rate under an international tax convention.

         3.7      ROYALTY REPORTS. A royalty report containing the following
information shall accompany each royalty payment:

                  (a)      The total revenues of Licensed Products sold and
Licensed Method practiced by TOSOH and its Affiliates during the applicable
Royalty Period;

                  (b)      Calculation of Net Sales for the applicable Royalty
Period;

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                       9.
<PAGE>

                                                                    Confidential

                  (c)      Total Net Sales in U.S. dollars for the applicable
Royalty Period, together with the Exchange Rates used for conversion; and,

                  (d)      Calculation of the royalty amount payable to
GEN-PROBE for the applicable Royalty Period.

If no running royalties are due GEN-PROBE for a Royalty Period, the royalty
report shall so state. All royalty reports shall be maintained in strict
confidence by GEN-PROBE.

         3.8      BOOKS OF ACCOUNTS AND RECORDS. TOSOH shall keep, and shall
cause its Affiliates to which sublicenses have been granted under Section 2.3
hereof to keep, for a period of three (3) years after the close of each fiscal
year of TOSOH and such Affiliates, complete, true and accurate books of account
and other records containing all information and data which may be necessary to
ascertain and verify the amount of running royalties payable to GEN-PROBE
hereunder, including, without limitation, detailed backup for the computations
of Net Sales. During the term of this Agreement and for a period of two (2)
years thereafter, GEN-PROBE shall have the right (which GEN-PROBE may not
exercise more than once during each fiscal year) to cause an independent public
accounting firm selected by GEN-PROBE and acceptable to TOSOH to inspect, at
GEN-PROBE's own cost, the books and records of TOSOH and its Affiliates to which
sublicenses have been granted for the sole purpose of determining the accuracy
of the royalty report and calculation of running royalties. Such inspection
shall be made during normal business hours of TOSOH and such Affiliates and with
at least thirty (30) day prior notice. All the information disclosed to or
obtained by the independent public accounting firm shall not be disclosed to
anyone including GEN-PROBE (except as required by applicable law or by any
court, governmental agency or regulatory authority) and shall be held in strict
confidence, except that the independent public accounting firm may disclose to
GEN-PROBE whether any discrepancy in running royalties payment has been found
and the amount of such discrepancy.

         3.9      LATE PAYMENTS. In the event that any amount due GEN-PROBE by
TOSOH hereunder is not paid when due, TOSOH shall on GEN-PROBE's demand pay to
GEN-PROBE interest on overdue amount at the rate of [...***...] per annum from
the due date of such amount until the date such overdue payment is actually
received by GEN-PROBE.

         3.10     RUNNING ROYALTIES PAYABLE TO STANFORD. In consideration of the
sublicense granted under the Stanford Patent Rights pursuant hereto, TOSOH
agrees to pay to Stanford through GEN-PROBE an additional royalty on the net
sales defined in EXHIBIT C hereto of all licensed products defined in EXHIBIT C
sold by TOSOH and its Affiliates at the rate of [...***...] in accordance with
the other terms and conditions contained in EXHIBIT C hereto. The running
royalties payable under this Section 3.10 shall be determined on a quarterly
basis. The provisions of Sections 3.6 and 3.7 above shall apply mutatis mutandis
to the payment of running royalties to Stanford.

         3.11     THIRD PARTY ADDITIONAL ROYALTIES. If, after the Effective Date
and during the Term, GEN-PROBE and/or its Affiliates obtain any rights in
patents owned by third parties, the claims of which would be infringed by the
Licensed Products to the extent practicing any of the Gen-Probe Patent Rights or
the use or practice of any of the Gen-Probe Patent Rights and under

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      10.
<PAGE>

                                                                    Confidential

which Gen-Probe and/or its Affiliates have the right to grant licenses, then
such rights shall be included within the GEN-PROBE Patent Rights at TOSOH's
option upon TOSOH's written agreement to pay any royalties that may be due to
the third party in connection with TOSOH's sale of Licensed Products or use of
Licensed Methods, provided, however, that such rate shall not be more than
GEN-PROBE itself is obligated to pay on sales of its own products. In the event
that such rights in patents owned by a third party are obtained pursuant to
Section 3.12 (a), TOSOH shall not be required to pay GEN-PROBE any royalties due
to the third party. This Section 3.11 shall not apply to any license obtained by
TOSOH pursuant to Section 3.12 (b).

         3.12     INFRINGEMENT OF PATENTS OWNED BY THIRD PARTY. If any third
party makes a written claim or demand, or brings an action, suit or proceeding
against TOSOH and/or any of its Affiliates alleging infringement of such third
party's rights of patents or utility models by reason of the Licensed Products
manufactured, sold or otherwise disposed of by TOSOH or any of its Affiliates
(but only to the extent of that portion of the Licensed Product that practices
the TMA Method as claimed in any Gen-Probe Patent Rights), or the Licensed
Methods practiced by TOSOH or any of its Affiliates, then TOSOH shall promptly
notify GEN-PROBE in writing, and provide copies of all materials or papers
received by or served on TOSOH and/or any of its Affiliates from or by such
third party.

                  (a)      Within sixty (60) days of receipt of notice from
TOSOH, GEN-PROBE may, at its sole option and in its sole discretion, elect to
defend TOSOH and/or any of its Affiliates against such third party's allegation
of infringement. If GEN-PROBE exercises its option and elects to defend TOSOH
and/or any of its Affiliates, then:

                                    (1) GEN-PROBE shall indemnify TOSOH and/or
any of its Affiliates against all damage and cost as a result of the allegation
of infringement; and

                                    (2) TOSOH shall cooperate reasonably at
GEN-PROBE's expense with GEN-PROBE in defending against the allegation of
infringement.

                  (b)      If GEN-PROBE does not exercise its option and elect
to defend TOSOH and/or any of its Affiliates within sixty (60) days of receipt
of notice from TOSOH, then TOSOH shall send a written notice (the "SECOND
NOTICE") to GEN-PROBE stating that such sixty (60) day period has expired. If,
within fifteen (15) days following the receipt by GEN-PROBE of the Second
Notice, GEN-PROBE has not notified TOSOH of its desire to exercise its option
and elect to defend TOSOH and/or any of its Affiliates against such third
party's allegation of infringement, then TOSOH shall have the right to either:

                                    (1) (i) demand GEN-PROBE to [...***...], if
such accusation occurs in Japan no later than [...***...] after the First
Commercial SALE but in no event later than [...***...] there, or in the United
States or any European country no later than [...***...] after the First
Commercial Sale but in no event later than [...***...] there, whereupon
notwithstanding to the contrary contained herein, GEN-PROBE shall immediately
[...***...], and (ii)(A) [...***...], then terminate the license hereunder and
TOSOH's rights under the Gen-Probe Patent

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      11.
<PAGE>

                                                                    Confidential

Rights hereunder with respect to United States or the European country (as the
case may be) as to which the refund is demanded and paid and/or (B) if the
refund is demanded as to Japan, then terminate the license hereunder and all
TOSOH's rights under the Gen-Probe Patent Rights hereunder if the refund is
demanded and paid with respect to Japan;

<TABLE>
<CAPTION>
Refund Rate                  Country
-----------                  -------
<S>                        <C>
[...***...]                United States
[...***...]                A European country
[...***...]                Japan
</TABLE>

OR

                                    (2) continue this Agreement in full force
and effect, in which case no refund shall be payable to TOSOH under Section
3.12(b)(1) above, and (i) enter into a license agreement with such third party
which covers the manufacture and sale of Licensed Products and practice of
Licensed Methods by TOSOH and/or its Affiliates, and (ii) offset any
commercially reasonable license fee and running royalties paid by TOSOH to such
third party with respect to Licensed Products sold or otherwise disposed of or
the Licensed Methods practiced by TOSOH and/or its Affiliates in such country
against the royalty due and payable to GEN-PROBE with respect to the same
Licensed Products and Licensed Methods hereunder if such accusation occurs after
the First Commercial Sale.

                                   ARTICLE IV
                                    GRANTBACK

         4.1      GRANT OF LICENSE UNDER TOSOH DERIVATIVE PATENT RIGHTS. TOSOH
hereby grants GEN-PROBE, and shall cause its Affiliates to which sublicenses
have been granted under Section 2.3 hereof to grant to GEN-PROBE, and GEN-PROBE
hereby accepts, a non-exclusive, non-transferable, royalty-bearing license under
the Tosoh Derivative Patent Rights to develop, make, have made, use, offer for
sale, sell, have sold, import or otherwise dispose of any product or any method
practicing the Tosoh Derivative Patent Rights in the Field in the countries
where any of the Tosoh Derivative Patent Rights has been issued and any
application therefor has been filed, subject to the terms and conditions stated
below:

                  (a)      Specifically excluded from the license under Tosoh
Derivative Patent Rights is any assay products for detection of the targets
identified on EXHIBIT B, as long as and to the extent that such exclusion
remains with respect to Licensed Products and Licensed Method.

                  (b)      GEN-PROBE shall have the right to sublicense to its
Affiliates the licenses and rights granted by TOSOH to GEN-PROBE under this
Section 4.1, but without any right to sublicense further. GEN-PROBE shall not
have the right to grant a sublicense to any party other than its Affiliates
without the prior written consent of TOSOH.

                  (c)      The Parties shall agree upon a commercially
reasonable running royalty rate and/or other commercially reasonable terms and
conditions of the license granted to GEN-PROBE under the Tosoh Derivative Patent
Rights through good faith negotiations, taking into consideration the value
contributed by the Tosoh Derivative Patent Rights to the TMA

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      12.
<PAGE>

                                                                    Confidential

Method in comparison with the license fee and running royalty rates for license
under the Gen-Probe Patent Rights.

                  (d)      Promptly after any of the Tosoh Derivative Patent
Rights has become public or has issued, Tosoh shall inform GEN-PROBE of such
Tosoh Derivative Patent Rights and provide the patent application and
specification thereof.

         4.2      NO FURTHER LICENSE. Except for the licenses expressly granted
hereunder, no right, title, or interest in any discovery, invention or other
technology, data or information or any patent, copyright, trademark, or other
intellectual property rights therein owned by TOSOH and its Affiliates shall be
granted to GEN-PROBE under this Agreement. TOSOH shall not be under any
obligation hereunder to grant to GEN-PROBE any additional licenses other than
those granted hereby in any patent, copyright, trademark, or other intellectual
property.

         4.3      INFRINGEMENT OF PATENTS OWNED BY THIRD PARTY. If any third
party makes a written claim or demand, or brings an action, suit or proceeding
against GEN-PROBE and/or any of its Affiliates alleging infringement of patents
or utility models owned by such third party in a country where the Tosoh
Derivative Patent Rights has been issued by reason of the products practicing
the Tosoh Derivative Patent Rights manufactured, sold or otherwise disposed of
by GEN-PROBE and/or any of its Affiliates, then GEN-PROBE shall promptly notify
TOSOH in writing, and provide copies of all materials or papers received by or
served on GEN-PROBE and/or any of its Affiliates from or by such third party. In
the event that it would be impractical for GEN-PROBE or its Affiliates to
continue to sell products practicing the Tosoh Derivative Patent Rights or
change to non-infringing products except a royalty bearing license from such
third party if such accusation should prove, GEN-PROBE shall have the right to
(i) enter into a license agreement with such third party which covers the
manufacture and sale by GEN-PROBE and/or its Affiliates of such products
practicing the Tosoh Derivative Patent Rights, and (ii) offset the running
royalties paid by GEN-PROBE to such third party with respect to such products
sold by GEN-PROBE and its Affiliates in such country against the royalty due and
payable to TOSOH with respect to the same products hereunder.

                                   ARTICLE V
                       REPRESENTATION AND WARRANTIES, ETC.

         5.1      LEGAL RIGHT. Each Party represents and warrants that it has
all requisite power, authority and legal right to enter into this Agreement, and
to perform its obligations set forth herein.

         5.2      AUTHORIZATION. Each Party represents and warrants that the
execution, delivery and performance by it (a) have been duly authorized by all
necessary corporate or other actions of it, and (b) do not contravene, conflict
with or result in a breach of any permit, authorization or license, any charter
or any other organizational document, or any law, regulation, judgment, order,
agreement or legal or contractual obligations or restriction binding on or
otherwise affecting it.

         5.3      REQUIRED ACTIONS. Each Party represents and warrants that all
acts, conditions and things required to be done, fulfilled and performed by it
in order (a) to enable it to lawfully

                                      13.
<PAGE>

                                                                    Confidential

enter into or to perform its obligations under this Agreement, (b) to ensure
that its obligations under this Agreement are legal, valid and binding and (c)
to make this Agreement enforceable and admissible in evidence, have been done,
fulfilled and performed and will be done, fulfilled and performed.

         5.4      GEN-PROBE PATENT RIGHTS. GEN-PROBE represents and warrants
that it has the full legal power and right to grant the licenses and rights
under the Gen-Probe Patent Rights as set forth in this Agreement. GEN-PROBE
shall be responsible for effectuating the patent applications included within
the Gen-Probe Patent Rights and for maintaining the filed patents of the
Gen-Probe Patent Rights in effect and full force during the Term. GEN-PROBE
represents and warrants that the Gen-Probe Patent Rights identified in EXHIBIT A
hereto include all the patents and patent applications owned by GEN-PROBE and
its Affiliates necessary for the practice of the TMA Method as of the Effective
Date. In the event that any patents or patent applications owned by GEN-PROBE
and its Affiliates necessary for the practice of the TMA Method as of the
Effective Date are missing from EXHIBIT A hereto, such missing patents or patent
applications shall be automatically incorporated into EXHIBIT A hereto and
included in the Gen-Probe Patent Rights.

         5.5      STANFORD PATENT RIGHTS. GEN-PROBE represents and warrants that
it has the full legal power and right to grant the sublicense to TOSOH under the
Stanford Patent Rights as set forth in this Agreement. GEN-PROBE shall be
responsible for maintaining the license (including the right to sublicense to
TOSOH) under the Stanford Patent Rights in effect and full force during the term
of the Stanford License Agreement. In the event that the Stanford License
Agreement is amended, supplemented, revised, modified or terminated, GEN-PROBE
shall immediately notify TOSOH of such event.

         5.6      TEKNIKA PATENT RIGHTS. GEN-PROBE represents and warrants that
it has the full legal power and right to grant the benefits of immunity and
non-assertion under the Teknika Patent Rights and other patents rights as set
forth in this Agreement to Licensed Product sold and Licensed Method practiced
hereunder. GEN-PROBE shall be responsible for maintaining the benefits of such
immunity and non-assertion in effect and full force during the term of the
Teknika Non-Assertion Agreement. In the event that the Teknika Non-Assertion
Agreement is amended, supplemented, revised, modified or terminated, GEN-PROBE
shall immediately notify TOSOH of such event.

         5.7      NO CLAIM. GEN-PROBE represents and warrants that there are no
claims, actions, suits, or proceedings pending against GEN-PROBE, or to the
knowledge of GEN-PROBE, threatened against, or affecting the TMA Method as
practiced by GEN-PROBE before any court, governmental agency, regulatory
authority, arbitral tribunal or other body.

         5.8      DISCLAIMER. Except otherwise expressly represented and
warranted hereunder, the license and rights herein granted by either Party to
the other Party are provided WITHOUT WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED. Subject to the
provisions of Section 3.12 hereof, GEN-PROBE MAKES NO REPRESENTATION OR WARRANTY
THAT THE LICENSED PRODUCTS OR LICENSED METHOD WILL NOT INFRINGE ANY PATENT OR
PROPRIETARY RIGHT OF OTHERS. Subject to the provisions of Section 4.3 hereof,

                                      14.
<PAGE>

                                                                    Confidential

TOSOH MAKES NO REPRESENTATION OR WARRANTY THAT THE PRODUCTS OR METHOD PRACTICING
THE TOSOH DERIVATIVE PATENT RIGHTS WILL NOT INFRINGE ANY PATENT OR PROPRIETARY
RIGHT OF OTHERS. Except as expressly set forth in Section 5.4 hereof, NOTHING IN
THIS AGREEMENT SHALL BE CONSTRUED AS A REPRESENTATION OR WARRANTY MADE BY EITHER
PARTY THAT ANY PATENT OR UTILITY MODEL WILL ISSUE BASED UPON ANY PENDING
APPLICATION THEREFOR OR THAT ANY PATENT OR UTILITY MODEL IS OR WILL BE VALID.

         5.9      LIMITATION OF LIABILITY. IN NO EVENT SHALL EITHER PARTY BE
LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL
DAMAGES, LOSSES, COSTS OR EXPENSES OF ANY KIND, HOWEVER CAUSED ON ANY THEORY OF
LIABILITY AND WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE),
INCLUDING LOST PROFITS OR REVENUES AND LOSS OF GOODWILL, REGARDLESS OF WHETHER
SUCH PARTY KNOWS OR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR
LOSSES.

                                   ARTICLE VI
                                   [...***...]

         6.1      [...***...]. GEN-PROBE agrees that, in the event that
[...***...] the license.

                                  ARTICLE VII
                                 INDEMNIFICATION

         7.1      INDEMNIFICATION BY TOSOH. Subject to the provisions of Section
5.9, TOSOH shall indemnify, defend, and hold harmless GEN-PROBE and its
Affiliates and their directors, officers, employees, and agents and their
respective successors and permitted assigns against any and all claims, suits,
losses, liability, damages, or expenses (including reasonable attorney's fees
and expenses of litigation) resulting from or arising out of the exercise by
TOSOH and its Affiliates of the licenses and rights granted herein under the
Gen-Probe Patent Rights including any manufacture, use or sale of a Licensed
Product or practice of a Licensed Method. This indemnification shall include,
but not be limited to, any product liability.

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      15.
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                                                                    Confidential

7.2      INDEMNIFICATION BY GEN-PROBE. GEN-PROBE shall indemnify, defend, and
hold harmless TOSOH and its Affiliates and their respective successors and
permitted assigns against any and all claims, suits, losses, liability, damages,
or expenses (including reasonable attorney's fees and expenses of litigation)
resulting from or arising out of any allegation of infringement of the Stanford
Patent Rights or the Teknika Patent Rights, as the case may be, made or brought
by Stanford or Teknika against TOSOH or its Affiliates by reason of the Licensed
Products to the extent practicing the TMA Method (as claimed in any Gen-Probe
Patent Rights) or Licensed Method practiced by TOSOH or its Affiliates
hereunder. GEN-PROBE shall further indemnify, defend, and hold harmless TOSOH
and its Affiliates and their directors, officers, employees, and agents and
their respective successors, heirs and permitted assigns against any and all
claims, suits, losses, liability, damages, or expenses resulting from or arising
out of the exercise by GEN-PROBE and its Affiliates of the licenses granted
herein under the Tosoh Derivative Patent Rights including any manufacture, use
or sale of a product or method practicing the Tosoh Derivative Patent Rights
(including reasonable attorney's fees and expenses of litigation). This
indemnification shall include, but not be limited to, any product liability.

         7.3      OBLIGATIONS OF THE INDEMNIFIED PARTY. In each instance under
this Agreement where either Party (the "INDEMNIFYING PARTY") agrees to indemnify
the other Party (the "INDEMNIFIED PARTY"), the provisions of this Section 7.3
shall apply.

                  (a)      In the event that any such claim, action or demand is
made against the Indemnified Party, the Indemnified Party shall promptly upon
becoming aware of any such claim, demand or suit, notify the Indemnifying Party
in writing as to the nature and particulars of the same, promptly furnish the
Indemnifying Party with copies of any and all documents (inclusive of all
correspondence and pleadings other than attorney-client communications)
pertaining thereto, and provide the Indemnifying Party, at the cost of the
Indemnifying Party, with reasonable cooperation for the Indemnifying Party to
mitigate a loss or damage arising from any such claim, demand or suit. The
Indemnified Party shall also keep the Indemnifying Party continuously and fully
informed in a timely manner as to the status of the same and shall provide the
Indemnifying Party with copies of any additional documents pertaining thereto in
a timely manner.

                  (b)      The obligations of the Indemnifying Party under
Section 7.1 or 7.2 shall be contingent upon (i) the Indemnified Party giving
prompt written notice to the Indemnifying Party of any indemnified claim, action
or demand as provided in subparagraph (a) above, (ii) the Indemnified Party
allowing the Indemnifying Party to control the defense and related settlement
negotiations, including the selection of one attorney or law firm to represent
the Indemnified Party (who may also be the Indemnifying Party's attorney or law
firm), and (iii) the Indemnified Party fully assisting in the defense so long as
the Indemnifying Party agrees to pay the Indemnified Party's out-of-pocket
expenses.

                                  ARTICLE VIII
                              TERM AND TERMINATION

         8.1      ORIGINAL TERM. This Agreement shall commence on the Effective
Date and shall remain in effect until [...***...] in all countries within the
Territory other than North America

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      16.
<PAGE>

                                                                    Confidential

(the "NON-NORTH AMERICA TERRITORY"), and until January 1 , 2013 in North America
(the "NORTH AMERICA TERRITORY"), unless earlier terminated as provided in this
Article VIII.

         8.2      EXTENDED TERM. By giving notice in writing (the "EXTENSION
NOTICE") to GEN-PROBE not less than thirty (30) days prior to each expiration of
the original Term or extended Term, TOSOH may, at its sole discretion, extend
the original Term or extended Term in the Non-North America Territory or the
North America Territory, whereupon all the rights and licenses granted herein
shall continue until the expiration date specified in such Extension Notice,
which shall not be less than one year following the then-existing termination
date of this Agreement.

         If the original Term is extended beyond [...***...] in a country or
countries in the Non-North America Territory, the running royalty rate
applicable to Net Sales of the Licensed Products or practice of Licensed Methods
in such country or countries thereafter shall be the flat rate of [...***...].
If an extended Term is further extended beyond December 31, 2016 in a country or
countries in the Non-North America Territory, the running royalty rate
applicable to Net Sales of the Licensed Products or practice of Licensed Methods
in such country or countries thereafter shall be the flat rate of [...***...].

         If the original Term is extended beyond January 1, 2013 in the North
America Territory; the running royalty rate applicable to Net Sales of the
Licensed Products or practice of Licensed Method in the North America Territory
thereafter shall be the flat rate of [...***...]. If an extended Term is further
extended beyond December 31, 2015 in the North America Territory, the running
royalty rate applicable to Net Sales of the Licensed Products or practice of
Licensed Method in the North America Territory thereafter shall be the flat rate
of [...***...].

         8.3      EXTENDED TERM FOR TEKNIKA. By giving an Extension Notice to
GEN-PROBE prior to each expiration of the original Term or extended Term, TOSOH
may, at its sole discretion, extend the original Term or extended Term in the
Non-North America Territory or the North America Territory only to the extent of
the Teknika Patent Rights, whereupon the benefits of immunity and non-assertion
granted herein until the expiration date of any of the Teknika Patent Rights in
such Territory designated in the Extension Notice by TOSOH, to the extent that
GEN-PROBE has the right to grant such extension.

         8.4      MATERIAL BREACH BY TOSOH. If TOSOH violates or fails to
perform any material term or covenant of this Agreement, GEN-PROBE may give
written notice of such default to TOSOH. If TOSOH fails to take appropriate
steps to cure such default within sixty (60) days of the effective date of such
notice of default, GEN-PROBE shall have the right to terminate this Agreement by
issuing a written notice of termination to TOSOH without prejudice to any rights
or remedies available under this Agreement, at law or in equity. The license,
rights and benefits previously granted to TOSOH hereunder shall terminate
automatically on the effective date of such notice of termination The license
granted to GEN-PROBE shall continue in force and effect, subject to GEN-PROBE's
obligations to pay royalties to TOSOH.

         8.5      MATERIAL BREACH BY GEN-PROBE. If GEN-PROBE violates or fails
to perform any material term or covenant of this Agreement, TOSOH may give
written notice of such default to GEN-PROBE. If GEN-PROBE fails to take
appropriate steps to cure such default

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      17.
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                                                                    Confidential

within sixty (60) days of the effective date of such notice of default, TOSOH
shall have the right to (a) continue this Agreement in full force and effect, or
(b) terminate the provisions of Article IV by issuing a written notice of
termination thereof, in which event the license previously granted to GEN-PROBE
hereunder shall terminate automatically on the effective date of such notice of
termination, or (c) terminate this Agreement as a whole by issuing a written
notice of termination to GEN-PROBE. In all events, TOSOH may pursue all
available remedies under this Agreement, at law or equity against GEN-PROBE by
reason of such breach.

         8.6      SURVIVAL. The following shall survive the expiration or
termination of this Agreement:

                  (a)      TOSOH's obligations to pay the license fee and
running royalties that have accrued prior to termination;

                  (b)      GEN-PROBE's obligations to pay the running royalties
that have accrued prior to termination; and

                  (c)      The provisions of Sections 5.8 and 5.9, Article VII
(but only with respect to activities engaged in by the parties during the term
of the Agreement), Sections 10.1, 11.2, 11.7, 11.8, 11.11, 11.13 and this
Section 8.6.

                                   ARTICLE IX
                                 PATENT MARKING

         9.1      PATENT MARKING. If reasonably requested by either Party, the
other Party agrees to mark a container or insert therein containing a Licensed
Product under the Gen-Probe Patent Rights or a product practicing the Tosoh
Derivative Patent Rights, as the case may be, manufactured by such other Party
or its Affiliates hereunder with such patent notice as may be required by the
laws of a country where such Licensed Product or such product, as the case may
be, is sold.

                                    ARTICLE X
                                   ARBITRATION

         10.1     ARBITRATION. In the event of any Dispute, the Parties shall
seek to settle their differences amicably between themselves, including entering
into non-binding mediation. Any unresolved Dispute shall be resolved by final
and binding arbitration in accordance with this Article. Whenever a Party shall
decide to institute arbitration proceedings, it shall give written notice to
that effect to the other Party. The Party giving such notice shall refrain from
instituting the arbitration proceedings for a period of ten (10) days following
such notice to allow the Parties to attempt to resolve the Dispute. If the
Parties are still unable to resolve the Dispute, the Party giving notice may
institute the arbitration proceedings under the rules of Arbitration of the
International Chamber of Commerce as then in effect (the "ICC RULES").
Arbitration shall be held in The Hague, Netherlands. The arbitration shall be
conducted in English before three arbitrators, with each Party to select one
arbitrator and with the third arbitrator to be appointed in accordance with the
ICC Rules. The arbitrators shall not have the power to award punitive damages or
any award of multiple damages under this Agreement and such awards are expressly
prohibited. Any arbitration award shall be final and binding on the Parties.
Judgment on the

                                      18.
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                                                                    Confidential

award may be entered in any court having jurisdiction. Nothing contained in this
Article shall prevent either Party from seeking temporary restraining orders,
temporary or permanent injunctions or such other relief in any court of
competent jurisdiction.

                                   ARTICLE XI
                                  MISCELLANEOUS

         11.1     ASSIGNMENT. Neither Party to this Agreement shall have the
right to assign, delegate or otherwise transfer any rights or obligations under
this Agreement without the prior written consent of the other Party, which shall
not be unreasonably withheld. Any such purported transfer without such prior
written consent shall be deemed void and without effect.

         11.2     GOVERNING LAW. This Agreement will be construed and governed
by the laws of the State of New York, without giving effect to conflict of law
provisions.

         11.3     COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, and all of which
together shall be deemed to be one and the same instrument.

         11.4     NO THIRD PARTY BENEFITS. Nothing in this Agreement, express or
implied, is intended to confer on any person other than the Parties and their
Affiliates or their respective successors or permitted assigns, any benefits,
rights or remedies.

         11.5     HEADINGS. All headings in this Agreement are for convenience
only and shall not affect the meaning of any provision hereof.

         11.6     BINDING EFFECT. This Agreement shall inure to the benefit of
and be binding upon the Parties and their Affiliates and their respective
successors and assigns.

         11.7     COMPLIANCE WITH LAW. Nothing contained in this Agreement shall
be construed so as to require the commission of any act contrary to law, and
wherever there is any conflict between any provision of this Agreement and any
statute, law, ordinance or treaty, the latter shall prevail, but in such event
the affected provisions of the Agreement shall be conformed and limited only to
the extent necessary to bring it within the applicable legal requirements.

         11.8     NOTICES. All notices, requests, demands and other
communications required or permitted to be given pursuant to this Agreement
shall be in writing and in English, and shall be deemed to have been duly given
upon the date of receipt if delivered by hand, recognized international
overnight courier, confirmed facsimile transmission, or registered or certified
mail, return receipt requested, postage prepaid to the following addresses or
facsimile numbers:

         If to GEN-PROBE:                      If to TOSOH:

         Gen-Probe Incorporated                Tosoh Corporation
         10210 Genetic Center Drive            3-8-2, Shiba, Minato-ku
         San Diego, California 92121 - 4362    Tokyo 105-8623
         U.S.A.                                Japan
         Attn: Chairman                        Attn: Senior General Manager

                                      19.
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                                                                    Confidential

                                               Scientific Instruments Division
                                            Facsimile: [...***...]

Either Party may change its designated address and facsimile number by notice to
the other Party in the manner provided in this Section.

         11.9     AMENDMENT AND WAIVER. This Agreement may be amended,
supplemented, or otherwise modified only by means of a written instrument signed
by both Parties. Any waiver of any rights or failure to act in a specific
instance shall relate only to such instance and shall not be construed as an
agreement to waive any rights or fail to act in any other instance, whether or
not similar.

         11.10    SEVERABILITY. In the event that any provision of this
Agreement shall, for any reason, be held to be invalid, or unenforceable in any
respect, such invalidity or unenforceability shall not affect any other
provision hereof, and the Parties shall negotiate in good faith to modify the
Agreement to preserve (to the extent possible) their original intent.

         11.11    ATTORNEYS' FEES. If either Party commences an arbitration or
other action against the other Patty to enforce any of the terms hereof or
because of the material breach by such other Party of any of the terms or
covenants hereof, the prevailing Party shall be entitled, in addition to any
other relief granted, to all reasonable out-of-pocket costs and expenses
incurred by the prevailing Party in connection with such action, including,
without limitation, all reasonable attorneys' fees, and a right to such costs
and expenses shall be deemed to have accrued upon the commencement of such
action and shall be enforceable whether or not such action is prosecuted to
judgment.

         11.12    CALCULATION OF "NET SALES" IN OTHER LICENSE AGREEMENTS BETWEEN
PARTIES. The Parties have discussed the possibility of entering into other
license agreements concerning other patent rights. The Parties agree that in any
such other license agreements, "Net Sales" shall be defined in a manner to
permit a deduction from gross sales of all running royalties to be made under
this Agreement which are reasonably allocated to each royalty period therein.

         11.13    CONFIDENTIALITY. Except as required by law or a court or
administrative order, the terms of this Agreement and all information disclosed
hereunder and designated as confidential shall be considered as confidential
information of the disclosing Party and the receiving Party shall use the same
care to protect such information as it uses to protect its own confidential
information of like kind. This confidentiality obligation shall not apply:

                  (a)      to information which was generally available to the
public at the time of disclosure, or information which becomes available to the
public after disclosure by the disclosing Party other than through fault of the
receiving Party; or

                  (b)      to information which has been already known to the
receiving Party prior to its receipt from the disclosing Party; or

                  (c)      to information which is obtained at any time lawfully
from a third party under circumstances permitting its disclosure to others; or

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      20.
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                                                                    Confidential

                  (d)      to information which is developed independently by
the receiving Party other than through knowledge of the information received
from the disclosing Party.

         Notwithstanding the foregoing, promptly after the execution of this
Agreement, the Parties shall agree upon the substance of information that can be
used to describe the terms of the transaction contemplated by this Agreement so
that the Parties can disclose such information, as may be modified by mutual
written agreement from time to time, without the other party's consent.

         11.14    ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement between the Parties with respect to the subject matter hereof.

         11.15    PRESS RELEASE. Neither Party shall issue any press release or
other public announcement relating to this Agreement without obtaining the other
Party's written approval, which will not be unreasonably withheld.

         IN WITNESS WHEREOF, the undersigned have duly executed and delivered
this Agreement as a sealed instrument effective as of the date first above
written.

GEN-PROBE INCORPORATED

By: /s/ Henry L. Nordhoff
    ----------------------------------------
       Henry L. Nordhoff
       Chief Executive Officer and Chairman

TOSOH CORPORATION

By: /s/ Madoka Tashiro
    ----------------------------------------
       Madoka Tashiro
       Chief Executive Officer and Chairman

                                      21.
<PAGE>

                                                                    Confidential

                                    EXHIBIT A

                                GEN-PROBE PATENTS

                                   [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      22.
<PAGE>

                                                                    Confidential

                                    EXHIBIT B

                                   [...***...]

                                   [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      23.
<PAGE>

                                                                    Confidential

                                    EXHIBIT C

                            CONDITIONS OF SUBLICENSE
                        UNDER THE STANFORD PATENT RIGHTS

1.       DEFINITIONS

         The following definitions shall apply within this EXHIBIT C. All other
         defined terms shall have the meanings set forth elsewhere in this
         Agreement between GEN-PROBE and TOSOH of which this EXHIBIT C
         constitutes an integral part.

         "Invention" shall mean all rights, titles and interest to the technique
         of Selective Amplification of Target Polynucleotide Sequences, as
         described in Stanford Docket S87-012 and pursuant to 35 U.S.C. 202, and
         any Licensed Patent(s), as hereinafter defined, which may issue to such
         Invention.

         "Licensed Patent(s)" means US Patent No. 5,437,990 issued on August 1,
         1995 and any Letters Patent issued upon Stanford's US. Patent
         Application, Serial Number 080,479 filed July 31, 1987, including the
         information contained in such application, with respect to the
         Invention, any foreign patents corresponding thereto, and/or any
         divisions, continuations, or continuations-in-part, or reissue thereof.

         "Licensed Product(s)" means any product, the manufacture, use, or sale
of which:

                  (a)      Is covered by a valid claim of an issued, unexpired
                           Licensed Patent(s) directed to the Invention. A claim
                           of an issued, unexpired Licensed Patent(s) shall be
                           presumed to be valid unless and until it has been
                           held to be invalid by a final judgment of a court of
                           competent jurisdiction from which no appeal can be or
                           is taken;

                  (b)      Is covered by any claim being prosecuted in a pending
                           application directed to the Invention.

         "Net Sales" means the gross revenue of the Licensed Product(s) in the
         form in which it is sold or used, whether or not assembled (and without
         excluding therefrom any components or subassemblies thereof, whatever
         their origin and whether or not patent impacted), less the following
         items but only insofar as they actually pertain to the disposition of
         such Licensed Product(s) by Gen-Probe and/or sublicensee(s) and are
         included in such gross income, and (except Items (d) and (e)) are
         separately billed:

                  (a)      Import, export, excise, and sales taxes, plus custom
                           duties;

                  (b)      Cost of insurance, from the place of manufacture or
                           point of installation, packing, and transportation to
                           the customer's premises or point of installation;

                  (c)      Costs of installation at the place of use;

                                      24.
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                                                                    Confidential

                  (d)      Credit for returns, rejections, recalls, allowances,
                           or trades; and

                  (e)      a reasonable allocation for the rental of an
                           instrument when the product is sold under a reagent
                           rental program, except where the instrument is a
                           Licensed Product.

2.       GRANT

         2.1      Upon termination of this Agreement for any cause, any
         sublicense granted hereunder shall continue with STANFORD provided the
         sublicensee agrees to thereafter assume the obligations of GEN-PROBE
         insofar as they correspond to the scope of the sublicense.

3.       ROYALTIES

         3.1      The royalty on sales in currencies other than U.S. Dollars
         shall be calculated using the appropriate foreign exchange rate for
         such currency quoted by the Bank of America (San Francisco) foreign
         exchange desk, on the close of business on the last banking day of each
         calendar quarter. Royalty and payments to STANFORD shall be in U.S.
         Dollars and shall be net of all non-U.S. taxes.

4.       REPORTS, PAYMENTS AND ACCOUNTING

         4.1      QUARTERLY ROYALTY PAYMENT AND REPORT. TOSOH shall make written
         reports and royalty payments to STANFORD within ninety (90) days after
         the end of each calendar quarter. This report shall state the number,
         description, and aggregate Net Sales of Licensed Product(s) during such
         completed calendar quarter, and resulting calculation of earned royalty
         payment due STANFORD for such completed calendar quarter. Concurrent
         with the making of each such report, TOSOH shall include payment due
         STANFORD of royalties for the calendar quarter covered by such report.

         4.2      ACCOUNTING. TOSOH agrees to keep records for a period of three
         (3) years showing the manufacturing, sales, use, and other disposition
         of products sold or otherwise disposed of under the license herein
         granted in sufficient detail to enable the royalties payable hereunder
         by TOSOH to be determined, and further agrees to permit its books and
         records to be examined to the extent necessary to verify reports
         provided for in Paragraph 4.1 of this EXHIBIT C by an independent
         certified accountant, provided that such audits occur no more than one
         (1) time per calendar year and provided further that accountants shall
         report to STANFORD only errors regarding calculation of royalties. Such
         examination is to be made by STANFORD, at the expense of STANFORD,
         except in the event that the results of the audit reveal a discrepancy
         in TOSOH's favor of ten percent (10%) or more, then the audit fees
         shall be paid by TOSOH.

5.       WARRANTY AND NEGATION OF WARRANTIES

         5.1      Nothing in this License is or shall be construed as:

                                      25.
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                                                                    Confidential

                  (a)      A warranty or representation by Stanford as to the
                           validity or scope of any Licensed Patent(s);

                  (b)      A warranty or representation that anything made,
                           used, sold, or otherwise disposed of under any
                           license granted in this License is or will be free
                           from of patents, copyrights, and other rights of
                           third parties;

                  (c)      An obligation to bring or prosecute actions or suits
                           against third parties for infringement, except that
                           Stanford, TOSOH, and GEN-PROBE shall promptly inform
                           each other of any suspected infringement of any
                           Licensed Patent(s) by another party; or

                  (d)      Granting by implication, estoppel, or otherwise any
                           licenses under patents of Stanford or other persons
                           other than Licensed Patent(s), regardless of whether
                           such patents are dominant or subordinate to any
                           Licensed Patent(s).

         5.2      EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, STANFORD
         MAKES NO REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER
         EXPRESS OR IMPLIED. THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OR
         MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR THAT THE USE OF
         THE LICENSED PRODUCT(S) WILL NOT INFRINGE ANY PATENT, COPYRIGHT,
         TRADEMARK, OR OTHER RIGHTS OF THIRD PARTIES.

6.       INDEMNITIES

         6.1      GEN-PROBE agrees to indemnify, hold harmless, and defend
         Stanford and its trustees, officers, employees, students, and agents
         against any and all claims for death, illness, personal injury,
         property damage, and improper business practices arising out of the
         manufacture, use, sale, or other disposition of Invention, Licensed
         Patent(s), or Licensed Product(s) by GEN-PROBE, its sublicensees or
         their customers.

         6.2      TOSOH shall at all times comply, through insurance or
         self-insurance, with all statutory workers' compensation and employer's
         liability requirements covering any and all employees with respect to
         activities performed under this License.

                                      26.
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                                                                    Confidential

                                    EXHIBIT D

                    CONDITIONS OF IMMUNITY AND NON-ASSERTION
                         UNDER THE TEKNIKA PATENT RIGHTS

1.       DEFINITIONS

         The following definitions shall apply within this EXHIBIT D. All other
         defined terms shall have the meanings set forth elsewhere in this
         Agreement between GEN-PROBE and TOSOH of which this EXHIBIT D
         constitutes an integral part.

         "Teknika Patent Rights" shall mean the patents and patent applications
         set forth in the "Teknika Patent List" set forth below, together with
         any unlisted patents and patent applications from which any of the
         listed patents claim priority, and any and all patents that have issued
         or in the future issue from the foregoing patents and patent
         applications, including utility, model and design patents and
         certificates of invention, and all divisionals, continuations,
         continuations-in-part, reissues, renewals, extensions or additions
         thereof claiming priority from any of the foregoing patents or patent
         applications heretofore or hereafter having legal force in any country
         to the extent that TEKNIKA has the right to grant licenses, immunities,
         or rights thereunder or to assert rights thereunder.

         Explicitly and specifically excluded from TEKNIKA Patent Rights are
         rights to specific nucleic acid sequences described in or subsequently
         claimed by the above patents and patent applications and all
         continuations, continuations-in-part, divisionals, re-examinations,
         renewals, reissues, additions, and extensions thereof claiming priority
         from any of the patents or patent applications set forth in the Teknika
         Patent List heretofore or hereafter having legal force in any country
         to the extent that either party has the right to grant licenses,
         immunities, or rights thereunder or to assert rights thereunder.

                  "GEN-PROBE Version" shall mean transcription-based nucleic
                  acid amplification using [...***...].

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      27.
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                                                                    Confidential

                                   [...***...]

                                      28.
<PAGE>

                                                                    Confidential

                                   [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      29.
<PAGE>

                                                                    Confidential

                                   [...***...]

                                               *CONFIDENTIAL TREATMENT REQUESTED

                                      30.
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                                                                    Confidential

2.       NON-EXCLUSIVE IMMUNITY

         2.1      GEN-PROBE grants TOSOH and its Affiliates, the benefit
         obtained from Teknika under the Teknika Non-Assertion Agreement of
         worldwide, non-exclusive immunity from legal action under the Teknika
         Patent Rights to make, use and/or sell products based on, incorporating
         or utilizing GEN-PROBE Version. The grant of immunity under this
         Section shall not be transferable by TOSOH and its Affiliates to any
         third party without GEN-PROBE and Teknika's prior written approval.

         2.2      TOSOH agrees not to practice Teknika Version.

         2.3      TOSOH agrees, at the request of Teknika, to permit an annual
         review of its manufacturing records (and such other records as may be
         required) by an impartial, technically qualified third party to verify
         compliance with the provisions of Section 2.2 above. Selection of such
         third party shall be subject to the approval of TOSOH, such approval to
         be not unreasonably withheld. The results of such a review as provided
         to Teknika will consist solely of a finding of compliance or
         non-compliance. The cost of such review shall be borne by Teknika and
         shall not be unreasonably burdensome for TOSOH.

         2.4      GEN-PROBE grants TOSOH and its Affiliates, the benefit
         obtained from Teknika under the Teknika Non-Assertion Agreement of
         non-assertion against TOSOH and its Affiliates in any jurisdiction the
         Teknika Patent Rights, or any other patent rights owned or acquired by
         Teknika that would be infringed by the practice of the Gen-Probe
         Version of transcription-based amplification. The foregoing sentence,
         however, expressly shall not prevent or prohibit Teknika from asserting
         any Teknika Patent Rights or such other patent rights, to prevent TOSOH
         or its Affiliates, from practicing the Teknika Version of
         transcription-based amplification.

3.       CONFIDENTIALITY

         3.1      TOSOH agrees that it will not discuss the terms and conditions
         of the immunity and non-assertion under the Teknika Patent Rights with
         any third party (except as may be required by applicable law,
         regulation, or court order) and will not make any external public
         communications with respect to those terms and conditions without
         consulting with and obtaining prior written approval from GEN-PROBE and
         Teknika.

4.       TERMINATION

         4.1      Upon termination of the Teknika Non-Assertion Agreement by
         Teknika due to GEN-PROBE's faults, Teknika shall grant direct immunity
         from legal action to TOSOH, provided that:

                                      31.
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                                                                    Confidential

                  (a)      Teknika shall have received express written notice of
                           the license granted to TOSOH prior to the effective
                           termination date of the Teknika Non-Assertion
                           Agreement;

                  (b)      TOSOH expressly agreed in writing on or before the
                           ninetieth (90th) day prior to the effective
                           termination date of the Teknika Non-Assertion
                           Agreement to be bound by the terms and conditions
                           thereof.

                                      32.
<PAGE>

                                    EXHIBIT E

                               GEN-PROBE PRODUCTS

<TABLE>
<CAPTION>
PRODUCTS NAME                       CATALOG NO.
--------------                      -----------
<S>                                <C>
[...***...]                        [...***...]

[...***...]                        [...***...]

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</TABLE>

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                                      33.
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                                      34.

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00061-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00061-of-00352.parquet"}]]