Document:

<PAGE>

                                  EXHIBIT 10.48
                   OFFER OF EMPLOYMENT LETTER FROM THE COMPANY
                                  TO GURI STARK

September 4, 1998

Mr. Guri Stark
50 Aaron Drive
Novato, CA 94949

Dear Guri,

We are very pleased to offer you the position of Vice President, Vice President,
Marketing of our Digital Imaging Solutions SBU, reporting to Michael Steep, Sr.
VP/GM pending successful completion of a background check.

ENCAD's goal is to provide its executive team with a competitive compensation
program that rewards the team on performance and contribution to the growth and
success of our organization. The Board of Directors has set forth an executive
compensation philosophy that provides:

     -    Base salary compensation at the 50th - 60th percentile of salaries at
          high tech companies of comparable size.

     -    An annual incentive plan that is leverage so performance substantially
          above targeted financial levels will result in total annual cash
          compensation above competitive levels.

In the spirit of our executive compensation philosophy, we are pleased to offer
you the following:

     -    A base salary of ** bi-weekly **.

     -    A start date of October 5, 1998.

     -    Stock options in the amount of ** shares. The price per share of
          these options will be determined by the fair market value on the date
          of grant under the terms of ENCAD's Stock Option Plan. A meeting to
          explain your stock option plan will be held shortly after you begin
          work. Key employees who participate in the stock option plan will be
          expected to give their full professional effort to the Company.
          Outside consulting is discouraged except when done through ENCAD.

     -    A car allowance of ** (gross) per month.

     -    3 weeks vacation per year.

     -    Participation in ENCAD's Executive bonus program. This program
          provides for a range of bonus from ** to ** of your base annual
          salary with a 100% target of 30%. Bonus payouts are based on the
          Company's operating profit before taxes and your individual
          performance against pre-established objectives. Your bonus for 1998
          will be pro-rated based on your start date, with a guarantee of **
          provided

 ** CONFIDENTIAL TREATMENT REQUESTED

<PAGE>

          successful completion of your 1998 personal objectives. Details of the
          plan will be provided to you upon hire.

     -    Participation in ENCAD's semi-annual Employee Profit Sharing Plan.
          Historically, ENCAD's profit sharing plan has paid out at
          approximately ** of base pay.

     -    Relocation Assistance: To assist you with your move to San Diego,
          ENCAD will reimburse you for the following relocation expenses, in
          accordance with company practices:

               -    Movement of household goods.

               -    Househunting trip for your family.

               -    Relocation allowance in the amount of ** (gross) to offset
                    any miscellaneous T&E expense incurred during the temporary
                    transition period prior to relocation of your family and
                    home. This allowance is designed to give you greater
                    flexibility in managing your relocation expenses and
                    focusing ENCAD's financial assistance in the areas of your
                    special needs.

               -    Home purchase assistance - reimbursement of customary,
                    non-negotiable, non recurring and legally required closing
                    costs when purchasing a home in San Diego.

               -    Home sale assistance - reimbursement of customary,
                    non-negotiable, non recurring legally required closing costs
                    associated with the sale of your home. In addition, ENCAD
                    will reimburse the actual incurred real estate commission,
                    not to exceed 6%.

               -    Tax gross-up on eligible relocation expenses.

               -    Temporary living (air/hotel) reimbursement for a period not
                    to exceed 6 months.

               Upon acceptance, and when ready to relocate to San Diego, the
               above package must be coordinated through ENCAD's relocation
               service, PRC (Professional Relocation & Consulting Services).
               Your contact is Lucy Donaldson who can be reached at
               **. Ms. Donaldson will explain ENCAD's relocation expense
               guidelines and coordinate the various aspects of your relocation.
               RELOCATION MUST BE COMPLETED AND REIMBURSED NO LATER THAN END OF
               YEAR 1999.

              Please note that if you voluntarily terminate or are terminated
              for cause within 12 months of your relocation, you will be
              required to reimburse ENCAD all relocation expenses that were paid
              by the company. Your signed acceptance of our offer indicates
              compliance with this provision of ENCAD's policy.

-             Eligibility to participate in ENCAD's benefit plans. Coverage
              includes medical, dental, life and disability insurance.
              Associated costs are attached. Additionally, ENCAD offers an
              on-site fitness center, health club membership, an attractive
              Employee Stock Purchase Plan, tuition reimbursement program, and
              401(k) plan.

-             A sign-on bonus in the amount of ** (net) paid in your first
              paycheck. (Please note, if you leave ENCAD within one year of
              employment, you will be required to reimburse this bonus to
              ENCAD.)

-             Severance package of 6 months base pay in the event that your
              employment is terminated with ENCAD within the first year of
              employment for any reason other than poor performance or "for
              cause."

 ** CONFINDENTIAL TREATMENT REQUESTED

<PAGE>

Due to the enactment of the Immigration Reform and Control Act of 1986, this
offer is contingent on your ability to produce acceptable documentation
verifying your eligibility to work in the United States. Please review the
enclosed INS I-9 form; it specifies which documents are acceptable. You will be
required to complete this form and present the necessary documents on the day
you begin work at ENCAD.

If you wish to accept our offer of employment, please sign and date this offer
and return it to me. Your signature below will indicate your understanding that
no other promises or representations have been made and that you will be
considered an at-will employee; either party may end the relationship at any
time. This offer is not a contract of employment, and the terms of employment
are subject to change.

Guri, this letter describes the "tangible" components of our offer; just as
important are the "intangible" we can offer you in terms of becoming a member of
our executive team. I sincerely believe that we can provide you the personal
challenges, professional support, and job satisfaction you are seeking!

We look forward to having you join us at ENCAD and a productive and mutually
rewarding working relationship. If you have any questions, please call me at
**.

Sincerely,

/s/  Sheryl Roland
---------------------------
Sheryl Roland
Director of Human Resources

Cc:      Mike Steep

Approved and accepted:

/s/  Guri Stark
---------------------------------           Date      9/8/98
Guri Stark                                      ------------------

** CONFIDENTIAL TREATMENT REQUESTED<PAGE>

================================================================================

                                       INDENTURE

                                   AFFYMETRIX, INC.

                                          to

                                 THE BANK OF NEW YORK

                                        Trustee

                     4.75% Convertible Subordinated Notes Due 2007

                             Dated as of February 14, 2000

================================================================================

<PAGE>

                                   TABLE OF CONTENTS
<TABLE>
                                                                                   Page
                                                                                  ------
         ARTICLE I DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION
<S>              <C>                                                              <C>
SECTION 1.01.    Definitions..........................................................1
SECTION 1.02.    Compliance Certificates and Opinions.................................9
SECTION 1.03.    Form of Documents Delivered to Trustee...............................9
SECTION 1.04.    Acts of Holders; Record Dates.......................................10
SECTION 1.05.    Notices, etc. to Trustee and Company................................12
SECTION 1.06.    Notice to Holders; Waiver...........................................12
SECTION 1.07.    Conflict with Trust Indenture Act...................................12
SECTION 1.08.    Effect of Headings and Table of Contents............................12
SECTION 1.09.    Successors and Assigns..............................................12
SECTION 1.10.    Severability Clause.................................................13
SECTION 1.11.    Benefits of Indenture...............................................13
SECTION 1.12.    Governing Law.......................................................13
SECTION 1.13.    Legal Holidays......................................................13

         ARTICLE II SECURITY FORMS

SECTION 2.01.    Forms Generally.....................................................13
SECTION 2.02.    Form of Face of Security............................................14
SECTION 2.03.    Form of Reverse of Security.........................................18
SECTION 2.04.    Form of Trustee's Certificate of Authentication.....................23
SECTION 2.05.    Form of Conversion Notice...........................................23
SECTION 2.06.    Form of Purchase Notice.............................................24
SECTION 2.07.    Form of Certification...............................................25

         ARTICLE III THE SECURITIES

SECTION 3.01.    Title and Terms.....................................................26
SECTION 3.02.    Denominations.......................................................26
SECTION 3.03.    Execution, Authentication, Delivery and Dating......................26
SECTION 3.04.    Global and Non-Global Securities....................................27
SECTION 3.05.    Registration; Registration of Transfer and Exchange.................28
SECTION 3.06.    Mutilated, Destroyed, Lost and Stolen Securities....................32
SECTION 3.07.    Payment of Interest; Interest Rights Preserved......................33

<PAGE>

SECTION 3.08.    Persons Deemed Owners...............................................34
SECTION 3.09.    Cancellation........................................................34
SECTION 3.10.    Computation of Interest.............................................34
SECTION 3.11     CUSIP Numbers.......................................................34

         ARTICLE IV SATISFACTION AND DISCHARGE

SECTION 4.01.    Satisfaction and Discharge of Indenture.............................35
SECTION 4.02.    Application of Trust Money..........................................36

         ARTICLE V REMEDIES

SECTION 5.01.    Events of Default...................................................36
SECTION 5.02.    Acceleration of Maturity; Rescission and Annulment..................38
SECTION 5.03.    Collection of Indebtedness and Suits for Enforcement by
                      Trustee........................................................39
SECTION 5.04.    Trustee May File Proofs of Claim....................................39
SECTION 5.05.    Trustee May Enforce Claims Without Possession of Securities.........40
SECTION 5.06.    Application of Money Collected......................................40
SECTION 5.07.    Limitation on Suits.................................................40
SECTION 5.08.    Unconditional Right of Holders To Receive Principal,
                      Premium and Interest and To Convert............................41

SECTION 5.09.    Restoration of Rights and Remedies..................................41
SECTION 5.10.    Rights and Remedies Cumulative......................................41
SECTION 5.11.    Delay or Omission Not Waiver........................................42
SECTION 5.12.    Control by Holders..................................................42
SECTION 5.13.    Waiver of Past Defaults.............................................42
SECTION 5.14.    Undertaking for Costs...............................................42
SECTION 5.15.    Waiver of Usury, Stay or Extension Laws.............................42

         ARTICLE VI THE TRUSTEE

SECTION 6.01.    Certain Duties and Responsibilities.................................43
SECTION 6.02.    Notice of Defaults..................................................44
SECTION 6.03.    Certain Rights of Trustee...........................................44
SECTION 6.04.    Not Responsible for Recitals or Issuance of Securities..............45
SECTION 6.05.    May Hold Securities.................................................45
SECTION 6.06.    Money Held in Trust.................................................45

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SECTION 6.07.    Compensation and Reimbursement......................................45
SECTION 6.08.    Disqualification; Conflicting Interests.............................46
SECTION 6.09.    Corporate Trustee Required; Eligibility.............................46
SECTION 6.10.    Resignation and Removal; Appointment of Successor...................46
SECTION 6.11.    Acceptance of Appointment by Successor..............................48
SECTION 6.12.    Merger, Conversion, Consolidation or Succession to Business.........48
SECTION 6.13.    Preferential Collection of Claims Against Company...................48
SECTION 6.14.    Appointment of Authenticating Agent.................................48
SECTION 6.15.    Appointment of Co-Trustee...........................................50

         ARTICLE VII HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 7.01.    Company To Furnish Trustee Names and Addresses of Holders...........50
SECTION 7.02.    Preservation of Information; Communications to Holders..............51
SECTION 7.03.    Reports by Trustee..................................................51
SECTION 7.04.    Reports by Company..................................................51

         ARTICLE VIII CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 8.01.    Company May Consolidate, etc., Only on Certain Terms................52
SECTION 8.02.    Successor Substituted...............................................53

         ARTICLE IX SUPPLEMENTAL INDENTURES

SECTION 9.01.    Supplemental Indentures Without Consent of Holders..................53
SECTION 9.02.    Supplemental Indentures with Consent of Holders.....................54
SECTION 9.03.    Execution of Supplemental Indentures................................55
SECTION 9.04.    Effect of Supplemental Indentures...................................55
SECTION 9.05.    Conformity with Trust Indenture Act.................................55
SECTION 9.06.    Reference in Securities to Supplemental Indentures..................55

         ARTICLE X COVENANTS

SECTION 10.01.   Payment of Principal, Premium and Interest..........................55
SECTION 10.02.   Maintenance of Office or Agency.....................................55
SECTION 10.03.   Money for Security Payments To Be Held in Trust.....................56
SECTION 10.04.   Statement by Officers as to Default.................................57
SECTION 10.05.   Existence...........................................................57
SECTION 10.06.   Maintenance of Properties...........................................57

<PAGE>

SECTION 10.07.   Payment of Taxes and Other Claims...................................58
SECTION 10.08.   Waiver of Certain Covenants.........................................58
SECTION 10.09.   Delivery of Certain Information.....................................58
SECTION 10.10.   Resale of Certain Securities; Reporting Issuer......................58
SECTION 10.11.   Registration Rights.................................................58

         ARTICLE XI REDEMPTION OF SECURITIES

SECTION 11.01.   Right of Redemption.................................................60
SECTION 11.02.   Applicability of Article............................................60
SECTION 11.03.   Election to Redeem; Notice to Trustee...............................60
SECTION 11.04.   Selection by Trustee of Securities to Be Redeemed...................61
SECTION 11.05.   Notice of Redemption................................................61
SECTION 11.06.   Deposit of Redemption Price.........................................62
SECTION 11.07.   Securities Payable on Redemption Date...............................62
SECTION 11.08.   Securities Redeemed in Part.........................................63
SECTION 11.09.   Conversion Arrangement on Call for Redemption.......................63

         ARTICLE XII SUBORDINATION OF SECURITIES

SECTION 12.01.   Securities Subordinate to Senior Indebtedness.......................64
SECTION 12.02.   Payment over of Proceeds upon Dissolution, Etc......................64
SECTION 12.03.   No Payment When Senior Indebtedness in Default......................65
SECTION 12.04.   Payment Permitted If No Default.....................................65
SECTION 12.05.   Subrogation to Rights of Holders of Senior Indebtedness.............65
SECTION 12.06.   Provisions Solely To Define Relative Rights.........................66
SECTION 12.07.   Trustee to Effectuate Subordination.................................66
SECTION 12.08.   No Waiver of Subordination Provisions...............................66
SECTION 12.09.   Notice to Trustee...................................................67
SECTION 12.10.   Reliance on Judicial Order or Certificate of Liquidating Agent......68
SECTION 12.11.   Trustee Not Fiduciary for Holders of Senior Indebtedness............68
SECTION 12.12.   Rights of Trustee as Holder of Senior Indebtedness;
                      Preservation of Trustee's Rights...............................68
SECTION 12.13.   Article Applicable to Paying Agents.................................68
SECTION 12.14.   Certain Conversions Deemed Payment..................................68

         ARTICLE XIII CONVERSION OF SECURITIES

SECTION 13.01.   Conversion Privilege and Conversion Price...........................69
</TABLE>

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<TABLE>
<S>                                                                                 <C>
SECTION 13.02.   Exercise of Conversion Privilege....................................70
SECTION 13.03.   Fractions of Shares.................................................71
SECTION 13.04.   Adjustment of Conversion Price......................................71
SECTION 13.05.   Notice of Adjustments of Conversion Price...........................76
SECTION 13.06.   Notice of Certain Corporate Action..................................76
SECTION 13.07.   Company to Reserve Common Stock.....................................77
SECTION 13.08.   Taxes on Conversions................................................77
SECTION 13.09.   Covenant as to Common Stock.........................................78
SECTION 13.10.   Cancellation of Converted Securities................................78
SECTION 13.11.   Provisions in Case of Reclassification, Consolidation, Merger
                      or Sale of Assets..............................................78
SECTION 13.12.   Trustee Adjustment Disclaimer.......................................78

                         ARTICLE XIV RIGHT TO REQUIRE PURCHASE

SECTION 14.01.   Right to Require Purchase...........................................79
SECTION 14.02.   Conditions and Procedures Relating to the Company's Election
                      to Pay the Purchase Price in Common Stock......................79
SECTION 14.03.   Notice, Method of Exercising Purchase Right.........................81
SECTION 14.04.   Deposit of Purchase Price...........................................81
SECTION 14.05.   Securities Not Purchased on Purchase Date...........................82
SECTION 14.06.   Securities Purchased in Part........................................82
SECTION 14.07.   Certain Definitions.................................................82

                     ARTICLE XV DEFEASANCE AND COVENANT DEFEASANCE

SECTION 15.01.   Company's Option to Effect Defeasance or Covenant
                      Defeasance.....................................................83
SECTION 15.02.   Defeasance and Discharge............................................83
SECTION 15.03.   Covenant Defeasance.................................................84
SECTION 15.04.   Conditions to Defeasance or Covenant Defeasance.....................84
SECTION 15.05.   Deposited Money and U.S. Government Obligations to Be
                      Held in Trust; Other Miscellaneous Provisions..................86

SECTION 15.06.   Reinstatement.......................................................86

                                 ARTICLE XVI IMMUNITY

SECTION 16.01.   Personal Immunity of Incorporators, Shareholders, Directors
                      and Officers...................................................87
</TABLE>

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                                                                             1

                             INDENTURE dated as of February 14, 2000, between
                      AFFYMETRIX, INC., a corporation duly organized and
                      existing under the laws of the State of Delaware (herein
                      called the "Company"), having its principal office at 3380
                      Central Expressway, Santa Clara, California 95051, and THE
                      BANK OF NEW YORK, as Trustee (herein called the
                      "Trustee").

               The Company has duly authorized the execution and delivery of
this Indenture to provide for the issuance of its 4.75% Convertible Subordinated
Notes due 2007 (herein called the "Securities"), to be issued as in this
Indenture provided.

               All things necessary to make the Securities, when executed by the
Company and authenticated and delivered hereunder and duly issued by the
Company, the valid obligations of the Company, and to make this Indenture a
valid agreement of the Company, in accordance with their and its terms, have
been done.

                              W I T N E S S E T H :

               For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually agreed, for the equal and
proportionate benefit of all Holders of the Securities or of any series thereof,
as follows:

                                    ARTICLE I

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

               SECTION 1.01. DEFINITIONS. For all purposes of this Indenture,
except as otherwise expressly provided or unless the context otherwise requires:

               1. The terms defined in this Article have the meanings assigned
to them in this Article and include the plural as well as the singular.

               2. All other terms used herein which are defined in the Trust
Indenture Act, either directly or by reference therein, have the meanings
assigned to them therein.

               3. All accounting terms not otherwise defined herein have the
meanings assigned to them in accordance with generally accepted accounting
principles, and, except as otherwise herein expressly provided, the term
"generally accepted accounting

<PAGE>

                                                                             2

principles" with respect to any computation required or permitted hereunder
shall mean such accounting principles as are generally accepted at the date
of such computation.

               4. Unless the context otherwise requires, any reference to an
"Article" or a "Section" refers to an Article or Section, as the case may be, of
this Indenture.

               5. The words "herein", "hereof" and "hereunder" and other words
of similar import refer to this Indenture as a whole and not to any particular
Article, Section or other subdivision.

               6. Unless the context otherwise requires, each reference to
"premium" includes the Make-Whole Payment, if any.

               Certain terms used in Article XIV have the meanings specified
therein.

               "Act", when used with respect to any Holder, has the meaning
specified in Section 1.04.

               "Additional Interest" has the meaning specified in Section 10.11.

               "Affiliate" of any specified Person means any other Person who
directly, or indirectly through one or more intermediaries, controls, is
controlled by, or is under common control with, such specified Person. For the
purposes of this definition, "control" when used with respect to any specified
Person means the power to direct the management and policies of such Person,
directly or indirectly, whether through the ownership of voting securities, by
contract or otherwise; and the terms "controlling" and "controlled" have
meanings correlative to the foregoing.

               "Agent Member" means any member of, or participant in, the
Depositary.

               "Applicable Procedures" means, with respect to any transfer or
transaction involving a Global Security or beneficial interest therein, the
rules and procedures of the Depositary for such Security, in each case to the
extent applicable to such transaction and as in effect from time to time.

               "Authenticating Agent" means any Person authorized by the Trustee
pursuant to Section 6.14 to act on behalf of the Trustee to authenticate
Securities.

               "Beneficial Owner" has the meaning specified in Section 14.07.

               "Board of Directors" means either the board of directors of the
Company or any duly authorized committee of that board.

               "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of

<PAGE>

                                                                             3

Directors and to be in full force and effect on the date of such certification,
and delivered to the Trustee.

               "Business Day" means a day on which banking institutions are open
for business and carrying out transactions in Dollars at the relevant place of
payment.

               "Change in Control" has the meaning specified in Section 14.07.

               "Closing Price" on any Trading Day with respect to the per share
price of Common Stock means the last reported sales price regular way or, in
case no such reported sale takes place on such Trading Day, the average of
the reported closing bid and asked prices regular way, in either case on the
New York Stock Exchange or, if the Common Stock is not listed or admitted to
trading on the New York Stock Exchange, on the principal national securities
exchange on which the Common Stock is listed or admitted to trading, or, if
not listed or admitted to trading on any national securities exchange, on
Nasdaq or, if the Common Stock is not listed or admitted to trading on any
national securities exchange or Nasdaq, the average of the closing bid and
asked prices in the over-the-counter market as furnished by any New York
Stock Exchange member firm that is selected from time to time by the Company
for that purpose and is reasonably acceptable to the Trustee.

               "Commencement Date" has the meaning specified in Section 13.04.

               "Commission" means the Securities and Exchange Commission, as
from time to time constituted, created under the Exchange Act, or, if at any
time after the execution of this instrument such Commission is not existing and
performing the duties now assigned to it under the Trust Indenture Act, then the
body performing such duties at such time.

               "Common Stock" includes any stock of any class of the Company
which has no preference in respect of dividends or of amounts payable in the
event of any voluntary or involuntary liquidation, dissolution or winding-up of
the Company and which is not subject to redemption by the Company. However,
subject to the provisions of Section 13.11, shares issuable on conversion of
Securities shall include only shares of the class designated as Common Stock of
the Company at the date of this instrument or shares of any class or classes
resulting from any reclassification or reclassifications thereof and which have
no preference in respect of dividends or of amounts payable in the event of any
voluntary or involuntary liquidation, dissolution or winding-up of the Company
and which are not subject to redemption by the Company; PROVIDED that if at any
time there shall be more than one such resulting class, the shares of each such
class then so issuable shall be substantially in the proportion which the total
number of shares

<PAGE>

                                                                             4

of such class resulting from all such reclassifications bears to the total
number of shares of all such classes resulting from all such
reclassifications.

               "Company" means the Person named as the "Company" in the first
paragraph of this instrument until a successor Person shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Company" shall mean such successor Person.

               "Company Order" has the meaning specified in the definition of
Company Request in this Section 1.01.

               "Company Request" or "Company Order" means a written request or
order signed in the name of the Company by its Chairman of the Board, its Vice
Chairman of the Board, its President or a Vice President, and by its Treasurer,
an Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered
to the Trustee.

               "Corporate Trust Office" means the principal office of the
Trustee in the city at which at any particular time its corporate trust business
shall be administered. As of the date hereof, the Corporate Trust Office of the
Trustee is located at 101 Barclay Street, Floor 21 West, New York, New York
10286.

               "Corporation" means a corporation, association, company,
joint-stock company or business trust.

               "Current Event" has the meaning specified in Section 13.04.

               "Defaulted Interest" has the meaning specified in Section 3.07.

               "Depositary" means, with respect to the Securities issued in
whole or in part in the form of one or more Global Securities, a clearing agency
registered under the Exchange Act that is designated to act as Depositary for
such Securities as contemplated by Section 2.01 (or any successor securities
clearing agency so registered).

               "Distribution Date" has the meaning specified in Section 13.04.

               "Dollar" or "U.S.$" means a Dollar or other equivalent unit in
such coin or currency of the United States as at the time shall be legal tender
for the payment of public and private debts.

               "DTC" means The Depository Trust Company, a New York corporation.

               "Event of Default" has the meaning specified in Section 5.01.

<PAGE>

                                                                             5

               "ex date" has the meaning specified in Section 13.04.

               "Exchange Act" means the Securities Exchange Act of 1934 as it
may be amended from time to time, and any successor act thereto, and the rules
and regulations of the Commission promulgated thereunder.

               "Expiration Date" has the meaning specified in Section 1.04.

               "Expiration Time" has the meaning specified in Section 13.04.

               "Global Security" means a Security that is registered in the
Security Register in the name of a Depositary or a nominee thereof.

               "Group" has the meaning specified in Section 14.07.

               "Holder" means a Person in whose name a Security is registered in
the Security Register.

               "Indenture" means this instrument as originally executed or as it
may from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
including, for all purposes of this instrument and any such supplemental
indenture, the provisions of the Trust Indenture Act that are deemed to be a
part of and govern this instrument and any such supplemental indenture,
respectively.

               "Initial Purchasers" means Credit Suisse First Boston
Corporation, FleetBoston Robertson Stephens Inc., ING Barings LLC and Merrill
Lynch, Pierce, Fenner & Smith Incorporated.

               "Interest Payment Date" means the Stated Maturity of an
installment of interest on the Securities.

               "Issue Date" means the date of first issuance of the Securities
under this Indenture.

               "junior securities" has the meaning specified in Section 12.14.

               "Make-Whole Payment" has the meaning specified in Section 11.01.

               "Maturity", when used with respect to any Security, means the
date on which the principal of such Security or an installment of principal
becomes due and

<PAGE>

                                                                             6

payable as therein or herein provided, whether at the Stated Maturity or by
declaration of acceleration, call for redemption, exercise of the purchase right
or otherwise.

               "Nasdaq" means Nasdaq Stock Market, Inc.

               "Notice of Default" means a written notice of the kind specified
in Section 5.01(4) or 5.01(5).

               "Officers' Certificate" means a certificate signed by any of the
Chairman of the Board, a Vice Chairman of the Board, the Chief Executive
Officer, the President or a Vice President, and by any of the Treasurer, an
Assistant Treasurer, the Secretary or an Assistant Secretary, of the Company,
and delivered to the Trustee. One of the officers signing an Officers'
Certificate given pursuant to Section 10.04 shall be the principal executive,
financial or accounting officer of the Company.

               "Opinion of Counsel" means a written opinion of counsel, who may
be internal counsel for the Company.

               "Other Event" has the meaning specified in Section 13.04.

               "Outstanding", when used with respect to Securities, means, as of
the date of determination, all Securities theretofore authenticated and
delivered under this Indenture, except:

               (i) Securities theretofore cancelled by the Trustee or delivered
        to the Trustee for cancellation;

               (ii) Securities for whose payment or redemption money in the
        necessary amount has been theretofore deposited with the Trustee or any
        Paying Agent (other than the Company) in trust or set aside and
        separated in trust by the Company (if the Company shall act as its own
        Paying Agent) for the Holders of such Securities; PROVIDED that, if such
        Securities are to be redeemed, notice of such redemption shall have been
        duly given pursuant to this Indenture or provision therefor satisfactory
        to the Trustee shall have been made;

               (iii) Securities which have been paid pursuant to Section 3.07 or
        in exchange for or in lieu of which other Securities have been
        authenticated and delivered pursuant to this Indenture, other than any
        such Securities in respect of which there shall have been presented to
        the Trustee proof satisfactory to it that such Securities are held by a
        bona fide purchaser in whose hands such Securities are valid obligations
        of the Company; and

<PAGE>

                                                                             7

               (iv) Securities which have been defeased pursuant to Section
15.02;

PROVIDED, HOWEVER, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given, made or taken any
request, demand, authorization, direction, notice, consent, waiver or other
action hereunder as of any date, Securities owned by the Company or any other
obligor upon the Securities or any Affiliate of the Company or of such other
obligor shall be disregarded and deemed not to be Outstanding, except that, in
determining whether the Trustee shall be protected in relying upon any such
request, demand, authorization, direction, notice, consent, waiver or other
action, only Securities which a Responsible Officer of the Trustee knows to be
so owned shall be so disregarded. Securities so owned which have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee's right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

               "Paying Agent" means any Person authorized by the Company to pay
the principal of (and premium, if any) or interest on any Securities on behalf
of the Company.

               "Person" means any individual, corporation, limited liability
company, partnership, joint venture, trust, unincorporated organization or
government or any agency or political subdivision thereof.

               "Predecessor Security" of any particular Security means every
previous Security evidencing all or a portion of the same debt as that evidenced
by such particular Security; and, for the purposes of this definition, any
Security authenticated and delivered under Section 3.06 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

               "Provisional Redemption" has the meaning specified in Section
11.01.

               "Provisional Redemption Date" has the meaning specified in
Section 11.01.

               "Purchase Date" has the meaning specified in Section 14.01.

               "Purchase Price" has the meaning specified in Section 14.01.

               "Purchased Shares" has the meaning specified in Section 13.04.

<PAGE>

                                                                             8

               "Qualified Institutional Buyer" means a "qualified institutional
buyer" as defined in Rule 144A.

               "Redemption Date", when used with respect to any Security to be
redeemed, means the date fixed for such redemption by or pursuant to this
Indenture.

               "Redemption Price", when used with respect to any Security to be
redeemed, means the price at which it is to be redeemed as set forth in the
Securities.

               "Reference Date" has the meaning specified in Section 13.04.

               "Registration Default" has the meaning specified in Section
10.11.
               "Registration Rights Agreement" has the meaning specified in
Section 10.11.

               "Regular Record Date" for the interest payable on any Interest
Payment Date means the February 1 or August 1 (whether or not a Business Day),
as the case may be, next preceding such Interest Payment Date.

               "Responsible Officer", when used with respect to the Trustee,
means any officer in the corporate trust department of the Trustee, including
any vice president, assistant vice president, assistant secretary, assistant
treasurer, trust officer or any other officer of the Trustee who customarily
performs functions similar to those performed by the Persons who at the time
shall be such officers, respectively, or to whom any corporate trust matter is
referred because of such person's knowledge of and familiarity with the
particular subject and who shall have direct responsibility for the
administration of this Indenture.

               "Restricted Global Security" has the meaning specified in Section
2.01.

               "Restricted Security" means a Security required to bear the
restricted securities legend set forth in Section 2.02.

               "Rule 144A" means Rule 144A under the Securities Act (or any
successor provision), as it may be amended from time to time.

               "Rule 144A Information" has the meaning specified in Section
10.09.

               "Securities" has the meaning stated in the first recital of this
Indenture and more particularly means any Securities authenticated and delivered
under this Indenture and "Security" means one of such Securities.

<PAGE>

                                                                              9
               "Securities Act" means the Securities Act of 1933 as it may be
amended from time to time, and any successor act thereto, and the rules and
regulations of the Commission promulgated thereunder.

               "Security Register" has the meaning specified in Section 3.05.

               "Security Registrar" has the meaning specified in Section 3.05.

               "Senior Indebtedness" means the principal of and premium, if any,
and interest on all indebtedness of the Company for money borrowed, other than
the Securities, whether outstanding on the date of execution of the Indenture or
thereafter created, incurred, guaranteed or assumed, except such indebtedness
that by the terms of the instrument or instruments by which such indebtedness
was created or incurred expressly provides that it (i) is junior in right of
payment to the Securities or (ii) ranks PARI PASSU in right of payment to the
Securities; provided, that the 5% Subordinated Convertible Notes due 2006 issued
pursuant to the Indenture dated as of September 22, 1999, between the Company
and the Trustee shall not constitute Senior Indebtedness. The term "indebtedness
for money borrowed" when used with respect to the Company is defined to mean (i)
any obligation of, or any obligation guaranteed by, the Company for the
repayment of borrowed money, whether or not evidenced by bonds, debentures,
notes or other written instruments, (ii) all obligations of the Company with
respect to interest rate hedging agreements to hedge interest rates, (iii) any
deferred payment obligation of, or any such obligation guaranteed by, the
Company for the payment of the purchase price of property or assets evidenced by
a note or similar instrument, and (iv) any obligation of, or any such obligation
guaranteed by, the Company for the payment of rent or other amounts under a
lease of property or assets which obligation is required to be classified and
accounted for as a capitalized lease on the balance sheet of the Company under
generally accepted accounting principles.

               "Shelf Registration Statement" has the meaning specified in
Section 10.11.

               "Special Record Date" for the payment of any Defaulted Interest
means a date fixed by the Trustee pursuant to Section 3.07.

               "Stated Maturity", when used with respect to any Security or any
installment of principal thereof or interest thereon, means the date specified
in such Security as the fixed date on which the principal of such Security or
such installment of principal or interest is due and payable.

               "Subsidiary" means a corporation more than 50% of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries, or by the Company and one or more other
Subsidiaries. For the

<PAGE>

                                                                              10

purposes of this definition, "voting stock" means stock
which ordinarily has voting power for the election of directors, whether at all
times or only so long as no senior class of stock has such voting power by
reason of any contingency.

               "Surrendered Securities" has the meaning specified in Section
2.07.

               "Trading Day" means each Monday, Tuesday, Wednesday, Thursday and
Friday, other than any day on which securities are not traded on the applicable
securities exchange or in the applicable securities market.

               "Transfer Restricted Securities" has the meaning specified in the
Registration Rights Agreement.

               "Trust Indenture Act" means the Trust Indenture Act of 1939 as in
force at the date as of which this instrument was executed and the rules and
regulations thereunder; PROVIDED, HOWEVER, that in the event the Trust Indenture
Act of 1939 or such rules and regulations are amended after such date, "Trust
Indenture Act" means, to the extent required by any such amendment, the Trust
Indenture Act of 1939 and such rules and regulations as so amended.

               "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument until a successor Trustee shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Trustee" shall mean such successor Trustee.

               "United States" means the United States of America (including the
States thereof and the District of Columbia), its territories, its possessions
and other areas subject to its jurisdiction.

               "U.S. Government Obligation" has the meaning specified in Section
15.04.
               "Vice President", when used with respect to the Company or the
Trustee, means any vice president, whether or not designated by a number or a
word or words added before or after the title "vice president".

               SECTION 1.02. COMPLIANCE CERTIFICATES AND OPINIONS. Upon any
application or request by the Company to the Trustee to take any action under
any provision of this Indenture, the Company shall furnish to the Trustee an
Officers' Certificate, if to be given by an officer of the Company, or an
Opinion of Counsel, if to be given by counsel, stating that all conditions
precedent, if any, provided for in this Indenture relating to the proposed
action have been complied with.

<PAGE>

                                                                              11

               Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include:

               (a) a statement that each individual signing such certificate or
        opinion has read such covenant or condition and the definitions herein
        relating thereto;

               (b) a brief statement as to the nature and scope of the
        examination or investigation upon which the statements or opinions
        contained in such certificate or opinion are based;

               (c) a statement that, in the opinion of each such individual, he
        has made such examination or investigation as is necessary to enable him
        to express an informed opinion as to whether or not such covenant or
        condition has been complied with; and

               (d) a statement as to whether, in the opinion of each such
        individual, such condition or covenant has been complied with.

               SECTION 1.03. FORM OF DOCUMENTS DELIVERED TO TRUSTEE. In any case
where several matters are required to be certified by, or covered by an opinion
of, any specified Person, it is not necessary that all such matters be certified
by, or covered by the opinion of, only one such Person, or that they be so
certified or covered by only one document, but one such Person may certify or
give an opinion with respect to some matters and one or more other such Persons
as to other matters, and any such Person may certify or give an opinion as to
such matters in one or several documents.

               Any certificate or opinion of an officer of the Company may be
based, insofar as it relates to legal matters, upon a certificate or opinion of,
or representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or Opinion of Counsel may be based, insofar as
it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.

               Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.
               SECTION 1.04. ACTS OF HOLDERS; RECORD DATES. Any request, demand,
authorization, direction, notice, consent, waiver or other action provided or
permitted by

<PAGE>

                                                                             12

this Indenture to be given or taken by Holders may be embodied in and
evidenced by one or more instruments of substantially similar tenor signed by
such Holders in person or by an agent duly appointed in writing; and, except
as herein otherwise expressly provided, such action shall become effective
when such instrument or instruments are delivered to the Trustee and, where
it is hereby expressly required, to the Company. Such instrument or
instruments (and the action embodied therein and evidenced thereby) are
herein sometimes referred to as the "Act" of the Holders signing such
instrument or instruments. Proof of execution of any such instrument or of a
writing appointing any such agent shall be sufficient for any purpose of this
Indenture and (subject to Section 6.01) conclusive in favor of the Trustee
and the Company, if made in the manner provided in this Section 1.04.

               The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be proved
in any other manner which the Trustee deems sufficient.

               The ownership of Securities shall be proved by the Security
Register.

               Any request, demand, authorization, direction, notice, consent,
waiver or other Act of the Holder of any Security shall bind every future Holder
of the same Security and the Holder of every Security issued upon the
registration of transfer thereof or in exchange therefor or in lieu thereof in
respect of anything done, omitted or suffered to be done by the Trustee or the
Company in reliance thereon, whether or not notation of such action is made upon
such Security.

               The Company may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities entitled to give or take any
request, demand, authorization, direction, notice, consent, waiver or other
action provided or permitted by this Indenture to be given or taken by Holders
of Securities; PROVIDED that the Company may not set a record date for, and the
provisions of this paragraph shall not apply with respect to, the giving or
making of any notice, declaration, request or direction referred to in the next
paragraph. If any record date is set pursuant to this paragraph, the Holders of
Outstanding Securities on such record date, and no other Holders, shall be
entitled to take the relevant action, whether or not such Holders remain Holders
after such record date; PROVIDED that no such action shall be effective
hereunder unless taken on or prior to the applicable Expiration Date by Holders
of the requisite principal amount of

<PAGE>

                                                                            13

Outstanding Securities on such record date; and PROVIDED FURTHER, that for
the purpose of determining whether Holders of the requisite principal amount
of such Securities have taken such action, no Security shall be deemed to
have been Outstanding on such record date unless it is also Outstanding on
the date such action is to become effective. Nothing in this paragraph shall
prevent the Company from setting a new record date for any action for which a
record date has previously been set pursuant to this paragraph (whereupon the
record date previously set shall automatically and with no action by any
Person be cancelled and of no effect), nor shall anything in this paragraph
be construed to render ineffective any action taken by Holders of the
requisite principal amount of Outstanding Securities on the date such action
is taken. Promptly after any record date is set pursuant to this paragraph,
the Company, at its own expense, shall cause notice of such record date, the
proposed action by Holders and the applicable Expiration Date to be given to
the Trustee in writing and to each Holder of Securities in the manner set
forth in Section 1.06.

               The Trustee may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities entitled to join in the giving
or making of (i) any Notice of Default, (ii) any declaration of acceleration
referred to in Section 5.02, (iii) any request to institute proceedings referred
to in Section 5.07(2), or (iv) any direction referred to in Section 5.12. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities on such record date, and no other Holders, shall be entitled to join
in such notice, declaration, request or direction, whether or not such Holders
remain Holders after such record date; PROVIDED that no such action shall be
effective hereunder unless taken on or prior to the applicable Expiration Date
by Holders of the requisite principal amount of Outstanding Securities on such
record date; and PROVIDED, FURTHER, that for the purpose of determining whether
Holders of the requisite principal amount of such Securities have taken such
action, no Security shall be deemed to have been Outstanding on such record date
unless it is also Outstanding on the date such action is to become effective.
Nothing in this paragraph shall be construed to prevent the Trustee from setting
a new record date for any action (whereupon the record date previously set shall
automatically and without any action by any Person be cancelled and of no
effect), nor shall anything in this paragraph be construed to render ineffective
any action taken by Holders of the requisite principal amount of Outstanding
Securities on the date such action is taken. Promptly after any record date is
set pursuant to this paragraph, the Trustee, at the Company's expense, shall
cause notice of such record date, the proposed action by Holders and the
applicable Expiration Date to be given to the Company in writing and to each
Holder of Securities in the manner set forth in Section 1.06.

               With respect to any record date set pursuant to this Section, the
party hereto that sets such record date may designate any day as the "Expiration
Date" and from time to time may change the Expiration Date to any earlier or
later day; PROVIDED that no

<PAGE>

                                                                            14

such change shall be effective unless notice of the proposed new Expiration
Date is given to the other party hereto in writing, and to each Holder of
Securities in the manner set forth in Section 1.06, on or before the existing
Expiration Date. Notwithstanding the foregoing, no Expiration Date shall be
later than the 180th day after the applicable record date and, if an
Expiration Date is not designated with respect to any record date set
pursuant to this Section, the party hereto that set such record date shall be
deemed to have designated the 180th day after such record date as the
Expiration Date with respect thereto.

               Without limiting the foregoing, a Holder entitled hereunder to
take any action hereunder with regard to any particular Security may do so with
regard to all or any part of the principal amount of such Security or by one or
more duly appointed agents, each of which may do so pursuant to such appointment
with regard to all or any part of such principal amount.

               SECTION 1.05. NOTICES, ETC. TO TRUSTEE AND COMPANY. Any request,
demand, authorization, direction, notice, consent, waiver or Act of Holders or
other document provided or permitted by this Indenture to be made upon, given or
furnished to, or filed with,

               (1) the Trustee by any Holder or by the Company shall be
sufficiently given if made, given, furnished or filed in writing to or with the
Trustee at its Corporate Trust Office, Attention: Corporate Trust
Administration, or at any other address previously furnished in writing to the
Company by the Trustee, or

               (2) the Company by the Trustee or by any Holder shall be
sufficiently given (unless otherwise herein expressly provided) if in writing
and mailed, first-class postage prepaid, to the Company, addressed to it at the
address of its principal office specified in the first paragraph of this
instrument or at any other address previously furnished in writing to the
Trustee by the Company.

               SECTION 1.06. NOTICE TO HOLDERS; WAIVER. Where this Indenture
provides for notice to Holders of any event, such notice shall be sufficiently
given (unless otherwise herein expressly provided) if in writing and mailed,
first-class postage prepaid, to each Holder affected by such event, at his
address as it appears in the Security Register, not later than the latest date
(if any), and not earlier than the earliest date (if any), prescribed for the
giving of such notice. In any case where notice to Holders is given by mail,
neither the failure to mail such notice, nor any defect in any notice so mailed,
to any particular Holder shall affect the sufficiency of such notice with
respect to other Holders. Where this Indenture provides for notice in any
manner, such notice may be waived in writing by the Person entitled to receive
such notice, either before or after the event, and such waiver shall be the
equivalent of such notice. Waivers of notice by

<PAGE>
                                                                            15

Holders shall be filed with the Trustee, but such filing shall not be a
condition precedent to the validity of any action taken in reliance upon such
waiver.

               In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such notification as shall be made with the approval of the Trustee shall
constitute a sufficient notification for every purpose hereunder.

               SECTION 1.07. CONFLICT WITH TRUST INDENTURE ACT. If any provision
hereof limits, qualifies or conflicts with a provision of the Trust Indenture
Act which is required under such Act to be a part of and govern this Indenture,
the latter provision shall control. If any provision of this Indenture modifies
or excludes any provision of the Trust Indenture Act which may be so modified or
excluded, the latter provision shall be deemed to apply to this Indenture as so
modified or to be excluded, as the case may be. To the extent a Security
conflicts with a provision in the Indenture, the Indenture governs.

               SECTION 1.08. EFFECT OF HEADINGS AND TABLE OF CONTENTS. The
Article and Section headings herein and the Table of Contents are for
convenience only and shall not affect the construction hereof.

               SECTION 1.09. SUCCESSORS AND ASSIGNS. All covenants and
agreements in this Indenture by the Company shall bind its successors and
assigns, whether so expressed or not.

               SECTION 1.10. SEVERABILITY CLAUSE. In case any provision in this
Indenture or in the Securities shall be invalid, illegal or unenforceable, the
validity, legality and enforceability of the remaining provisions shall not in
any way be affected or impaired thereby.

               SECTION 1.11. BENEFITS OF INDENTURE. Nothing in this Indenture or
in the Securities, express or implied, shall give to any Person, other than the
parties hereto and their successors hereunder, the holders of Senior
Indebtedness and the Holders of Securities, any benefit or any legal or
equitable right, remedy or claim under this Indenture.

               SECTION 1.12. GOVERNING LAW. THIS INDENTURE AND THE SECURITIES
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF
NEW YORK WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES.

               SECTION 1.13. LEGAL HOLIDAYS. In any case where any Interest
Payment Date, Redemption Date, Purchase Date or Stated Maturity of any
Security or the last date

<PAGE>
                                                                            16

on which a Holder has the right to convert his Securities shall not be a
Business Day then (notwithstanding any other provision of this Indenture or
of the Securities) payment of interest or principal (and premium, if any) or
conversion of the Securities need not be made on such date, but may be made
on the next succeeding Business Day with the same force and effect as if made
on the Interest Payment Date, Redemption Date, Purchase Date or at the Stated
Maturity, or on such last day for conversion; PROVIDED that no interest shall
accrue for the period from and after such Interest Payment Date, Redemption
Date, Purchase Date or Stated Maturity, as the case may be.

                                   ARTICLE II

                                 SECURITY FORMS

               SECTION 2.01. FORMS GENERALLY. The Securities, the conversion
notice and the Trustee's certificates of authentication shall be in
substantially the forms set forth in this Article, with such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture, and may have such letters, numbers or other marks
of identification and such legends or endorsements placed thereon as may be
required to comply with the rules of any securities exchange or Depositary
therefor or as may, consistently herewith, be determined by the officers
executing such Securities, as evidenced by their execution of the Securities.

               The definitive Securities shall be printed, lithographed or
engraved on steel engraved borders or may be produced in any other manner, all
as determined by the officers executing such Securities, as evidenced by their
execution of such Securities.

               In certain cases described elsewhere herein, the legends set
forth in the first four paragraphs of Section 2.02 may be omitted from
Securities issued hereunder.

               Upon their original issuance, Securities offered and sold as
provided in the Purchase Agreement, shall be issued in the form of a single
Global Security in definitive, fully registered form without interest
coupons, substantially in the form of Security set forth in Sections 2.02 and
2.03, with such applicable legends as are provided for in Section 2.02,
except as otherwise permitted herein. Such Global Security shall be
registered in the name of DTC, as Depositary, or its nominee or successor,
duly executed by the Company and authenticated by the Trustee as hereinafter
provided, and deposited with the Trustee, as custodian for DTC, for credit by
DTC to the respective accounts of beneficial owners of the Securities
represented thereby (or such other accounts as they may direct). Such Global
Security, together with its Successor Securities which are Global Securities,
are collectively herein called the "Restricted Global Security".

<PAGE>
                                                                            17

               Except as provided in this Section 2.01 or Section 3.05, owners
of beneficial interests in Global Securities will not be entitled to receive
physical delivery of certificated Securities. Upon transfer of definitive
Securities to a Qualified Institutional Buyer, such definitive Securities will,
unless the Restricted Global Security has previously been exchanged, be
exchanged for an interest in the Restricted Global Security pursuant to the
provisions of Section 3.05.

               Neither the Company nor the Trustee shall have any responsibility
for any defect in the CUSIP number that appears on any Security, check, advice
of payment or redemption or purchase notice, and any such document may contain a
statement to the effect that CUSIP numbers have been assigned by an independent
service for convenience of reference and that neither the Company nor the
Trustee shall be liable for any inaccuracy in such numbers.

               SECTION 2.02. FORM OF FACE OF SECURITY.

[INCLUDE IF SECURITY IS A RESTRICTED SECURITY OR A DEFINITIVE SECURITY OTHER
THAN A RESTRICTED GLOBAL SECURITY:

               THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF
1933 (THE "SECURITIES ACT"), AND THIS SECURITY AND THE COMMON STOCK ISSUABLE
UPON THE CONVERSION THEREOF MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN
THE ABSENCE OF SUCH REGISTRATION OR IN A TRANSACTION EXEMPT FROM, OR NOT SUBJECT
TO, THE SECURITIES ACT. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT
THE SELLER OF THIS SECURITY, AND THE COMMON STOCK ISSUABLE UPON THE CONVERSION
THEREOF, MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

               THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY
THAT (A) THIS SECURITY AND THE COMMON STOCK ISSUABLE UPON THE CONVERSION THEREOF
MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) TO A PERSON
WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS
DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE
REQUIREMENTS OF RULE 144A, (II) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER
THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (III)
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE

<PAGE>
                                                                            18

SECURITIES ACT, IN EACH OF CASES (I) THROUGH (III) IN ACCORDANCE WITH ANY
APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER
WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS
SECURITY AND ANY SHARES OF COMMON STOCK ISSUABLE UPON THE CONVERSION THEREOF OF
THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.]

               [INCLUDE IF SECURITY IS A RESTRICTED GLOBAL SECURITY:

               THE SECURITIES EVIDENCED BY THIS GLOBAL SECURITY (OR ITS
PREDECESSOR) WERE ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION
UNDER THE UNITED STATES SECURITIES ACT OF 1933 (THE "SECURITIES ACT"), AND SUCH
SECURITIES AND THE COMMON STOCK ISSUABLE UPON THE CONVERSION THEREOF MAY NOT BE
OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR IN
A TRANSACTION EXEMPT FROM, OR NOT SUBJECT TO, THE SECURITIES ACT. EACH PURCHASER
OF ANY BENEFICIAL INTEREST IN THE SECURITIES IS HEREBY NOTIFIED THAT THE SELLER
OF SUCH BENEFICIAL INTEREST MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS
OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

               EACH BENEFICIAL OWNER OF AN INTEREST IN ANY OF THE SECURITIES
EVIDENCED BY THIS GLOBAL SECURITY (INCLUDING ANY PARTICIPANT IN THE DEPOSITARY
HOLDING THE GLOBAL SECURITY THAT IS SHOWN AS HOLDING SUCH AN INTEREST ON THE
RECORDS OF SUCH DEPOSITARY AND EACH BENEFICIAL OWNER THAT HOLDS THROUGH SUCH
PARTICIPANT) AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) ANY BENEFICIAL
INTEREST IN THE SECURITIES AND THE COMMON STOCK ISSUABLE UPON THE CONVERSION
THEREOF MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) TO A
PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER
(AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE
REQUIREMENTS OF RULE 144A, (II) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER
THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (III)
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN
EACH OF CASES (I) THROUGH (III) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES
LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE BENEFICIAL OWNER WILL, AND
EACH SUBSEQUENT BENEFICIAL OWNER OF THIS SECURITY OR ANY SHARES OF COMMON STOCK
ISSUABLE UPON CONVERSION THEREOF IS

<PAGE>
                                                                            19

REQUIRED TO, NOTIFY ANY PURCHASER OF ANY BENEFICIAL INTEREST IN THE
SECURITIES AND ANY SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION THEREOF
FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.]

               [INCLUDE IF SECURITY IS A GLOBAL SECURITY:

               THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE
INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A
DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE
OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN
WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH
DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES
DESCRIBED IN THE INDENTURE.

               UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER,
EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF
CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE
OF DTC, AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC, ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL BECAUSE THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

<PAGE>
                                                                             20

                                   Affymetrix, Inc.

                     4.75% Convertible Subordinated Notes due 2007

                                                           CUSIP No. [         ]

No. ____                                                   U. S. $______________

               Affymetrix, Inc., a corporation duly organized and existing under
the laws of the State of Delaware (herein called the "Company", which term
includes any successor Person under the Indenture hereinafter referred to), for
value received, hereby promises to pay to ________, or registered assigns, the
principal sum of United States Dollars (U.S.$________ ) on February 15, 2007 and
to pay interest thereon from February 14, 2000, or from the most recent Interest
Payment Date to which interest has been paid or duly provided for, semi-annually
in arrears on February 15 and August 15 in each year, commencing August 15,
2000, at the rate of 4.75% per annum, until the principal hereof is paid or made
available for payment. The interest so payable, and punctually paid or duly
provided for, on any Interest Payment Date will, as provided in such Indenture,
be paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest, which shall be the February 1 or August 1 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.
Any such interest not so punctually paid or duly provided for will forthwith
cease to be payable to the Holder on such Regular Record Date and may either be
paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on a Special Record Date for
the payment of such Defaulted Interest to be fixed by the Trustee, notice
whereof shall be given to Holders of Securities not less than 10 days prior to
such Special Record Date, or be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the
Securities may be listed, and upon such notice as may be required by such
exchange, all as more fully provided in said Indenture.

               Payment of the principal of, premium, if any, and interest
(including payment of any Additional Interest) on this Security will be made at
the Corporate Trust Office, in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and
private debts by a U.S. Dollar check drawn on an account maintained with a bank
in the Borough of Manhattan, The City of New York;

<PAGE>

                                                                             21

PROVIDED, HOWEVER, that upon written application by the Holder to the Security
Registrar setting forth wire instructions not later than 5 days prior to the
relevant payment date (in the case of payment of principal) or not later than
the relevant Record Date (in the case of payment of interest), such Holder may
receive payment by wire transfer of Dollars to a U.S. Dollar account maintained
by the payee with a bank in the United States or in Europe and designated by the
payee to the Security Registrar. [Include if a Global Security--All payments by
the Company in respect of the Global Security shall be by wire transfer.]

               Reference is hereby made to the further provisions of this
Security set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

               Unless the certificate of authentication hereon has been executed
by the Trustee referred to on the reverse hereof by manual signature, this
Security shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

               IN WITNESS WHEREOF, the Company has caused this instrument to be
duly executed.

                                        AFFYMETRIX, INC.

                                        By:_____________________________________
                                           Name:
                                           Title:

               SECTION 2.03. FORM OF REVERSE OF SECURITY. This Security is one
of a duly authorized issue of Securities of the Company designated as its 4.75%
Convertible Subordinated Notes due 2007 (herein called the "Securities"),
limited in aggregate principal amount to U.S.$175,000,000 (subject to increase
as provided in this Indenture defined up to an additional U.S.$50,000,000
aggregate principal amount), issued and to be issued under an Indenture, dated
as of February 14, 2000 (herein called the "Indenture"), between the Company and
The Bank of New York, as Trustee for the Holders of Securities issued under said
Indenture (herein called the "Trustee", which term includes any successor
trustee under the Indenture), to which Indenture and all indentures supplemental
thereto reference is hereby made for a statement of the respective rights,
limitations of rights, duties and immunities thereunder of the Company, the
Trustee, the

<PAGE>

                                                                              22

holders of Senior Indebtedness and the Holders of the Securities and of the
terms upon which the Securities are, and are to be, authenticated and delivered.

               Subject to and upon compliance with the provisions of the
Indenture, the Holder of this Security is entitled, at his option, at any time
on or before the close of business on the Business Day immediately preceding
February 15, 2007, or in case this Security or a portion hereof is called for
redemption, then in respect of this Security or such portion hereof until and
including, but (unless the Company defaults in making the payment due upon
redemption or is otherwise due) not after, the close of business on the Business
Day immediately preceding the Redemption Date or Purchase Date, as the case may
be, to convert this Security (or any portion of the principal amount hereof
which is U.S.$1,000 or an integral multiple thereof), at the principal amount
hereof, or of such portion, into fully paid and non-assessable shares of Common
Stock of the Company at a conversion price equal to U.S.$321.00 aggregate
principal amount of Securities for each share of Common Stock (or at the current
adjusted conversion price if an adjustment has been made as provided in Article
XIII of the Indenture) by surrender of this Security, duly endorsed or assigned
to the Company or in blank, to the Company at its office or agency in the
Borough of Manhattan, The City of New York, accompanied by the conversion notice
hereon executed by the Holder hereof evidencing such Holder's election to
convert this Security, or if less than the entire principal amount hereof is to
be converted, the portion hereof to be converted, and, in case such surrender
shall be made during the period from the close of business on any Regular Record
Date to the opening of business on the corresponding Interest Payment Date
(unless this Security or the portion hereof being converted has been called for
redemption on a Redemption Date within such period between and including such
Regular Record Date and such Interest Payment Date), also accompanied by payment
in cash of an amount equal to the interest payable on such Interest Payment Date
on the principal amount of this Security then being converted. Subject to the
aforesaid requirement for payment of interest and, in the case of a conversion
after the close of business on any Regular Record Date and on or before the
corresponding Interest Payment Date, to the right of the Holder of this Security
(or any Predecessor Security) of record at such Regular Record Date to receive
an installment of interest (even if the Security has been called for redemption
on a Redemption Date within such period), no payment or adjustment is to be made
on conversion for interest accrued hereon or for dividends on the Common Stock
issued on conversion. No fractions of shares or scrip representing fractions of
shares will be issued on conversion, but instead of any fractional interest the
Company shall pay a cash adjustment or round up to the next higher whole share
as provided in Article XIII of the Indenture. The conversion price is subject
to adjustment as provided in Article XIII of the Indenture. In addition, the
Indenture provides that in case of certain reclassifications, consolidations,
mergers, sales or transfers of assets or other transactions pursuant to which
the Common Stock is converted into the right to receive other securities, cash
or other property, the Indenture shall be amended automatically, without the
consent of any

<PAGE>

                                                                              23

Holders of Securities, so that this Security, if then outstanding, will be
convertible thereafter, during the period this Security shall be convertible as
specified above, only into the kind and amount of securities, cash and other
property receivable upon the transaction by a holder of the number of shares
of Common Stock into which this Security might have been converted immediately
prior to such transaction.

               The Company will furnish to any Holder, upon request and without
charge, copies of the Certificate of Incorporation and By-laws of the Company
then in effect. Any such request may be addressed to the Company.

               The Securities may be provisionally redeemed by the Company, in
whole or in part, at any time prior to February 20, 2003, at a Redemption Price
equal to $1,000 per security to be redeemed plus accrued and unpaid interest, if
any (including Additional Interest, if any) to the Redemption Date if (i) the
closing price of the common Stock shall have exceeded 150% of the conversion
price then in effect for at least 20 Trading Days in any consecutive 30-Trading
Day period ending on the Trading Day prior to the date of mailing of the notice
of Provisional Redemption, which date shall be no more than 60 nor less than 20
days prior to the Redemption Date and (ii) the Shelf Registration Statement is
effective and available for use and is expected to remain effective and
available for use for the 30 days immediately following the Redemption Date.
Upon any such Provisional Redemption, the Company shall make an additional
Make-Whole Payment in cash with respect to the Securities called for redemption
to Holders on the date of mailing of the notice of Provisional Redemption in an
amount equal to $142.50 per $1,000 Security, less the amount of any interest
actually paid on such Security prior to such date. The Company shall make the
Make-Whole Payment on all Securities called for Provisional Redemption,
including any Securities converted after the date of mailing of the notice of
Provisional Redemption and prior to the Redemption Date.

               The Securities are subject to redemption at the option of the
Company upon not less than 30 days' or more than 60 days' notice by mail, as a
whole or from time to time in part, at any time on or after February 20, 2003
through February 14, 2004 at 102.38% of the principal amount, and thereafter, at
the following Redemption Prices (expressed as percentages of the principal
amount), if redeemed during the 12-month period beginning on February 15 of the
years indicated,

<TABLE>
<CAPTION>
                                       Redemption
Year                                      Price
----                                   ----------
<S>                                    <C>
2004.........................            101.58%
2005.........................            100.79%
2006 and thereafter..........             100%
</TABLE>

<PAGE>

                                                                              24

together in the case of any such redemption with accrued and unpaid interest to
(but not including) the Redemption Date, but interest installments whose Stated
Maturity is on or prior to such Redemption Date will be payable to the Holders
of such Securities, or one or more Predecessor Securities, of record at the
close of business on the relevant Record Dates referred to on the face hereof,
all as provided in the Indenture.

               In certain circumstances involving a Change in Control, each
Holder shall have the right to require the Company to redeem all or part of its
Securities at a purchase price equal to 100% of the principal amount thereof,
together with accrued and unpaid interest through the Purchase Date. The
Purchase Price is payable in cash or, at the Company's option but subject to the
satisfaction of certain conditions set forth in the Indenture, in shares of
Common Stock valued at 95% of the average Closing Prices of the Common Stock for
the five Trading Days preceding and including the third Trading Day prior to the
Purchase Date.

               The Securities do not have the benefit of any sinking fund.

               In the event of redemption, conversion or purchase of this
Security in part only, a new Security or Securities for the unredeemed,
unconverted or unpurchased portion hereof will be issued in the name of the
Holder hereof upon the cancellation hereof.

               Subject to certain limitations in the Indenture, at any time when
the Company is not subject to Section 13 or 15(d) of the United States
Securities Exchange Act of 1934, as amended, upon the request of a Holder or the
holder of shares of Common Stock issued upon conversion thereof, the Company
will promptly furnish or cause to be furnished Rule 144A Information (as defined
below) to such Holder or such holder of shares of Common Stock issued upon
conversion, or to a prospective purchaser of any such security designated by any
such Holder or holder of shares of Common Stock, as the case may be, to the
extent required to permit compliance by such Holder or holder of shares of
Common Stock with Rule 144A under the United States Securities Act of 1933 (the
"Securities Act"), in connection with the resale of any such security. "Rule
144A Information" shall be such information as is specified pursuant to Rule
144A(d)(4) under the Securities Act (or any successor provision thereto).

               If this Security is a Transfer Restricted Security, then the
Holder of this Security [IF THIS SECURITY IS A GLOBAL SECURITY, THEN INSERT-
(including any Person that has a beneficial interest in this Security)] and the
Common Stock issuable upon conversion thereof is entitled to the benefits of a
Registration Rights Agreement, dated as of February 14, 2000 (the "Registration
Rights Agreement") executed by the Company. If a Registration Default occurs (as
defined in the Registration Rights Agreement and in the Indenture), Additional
Interest will accrue on this Security from

<PAGE>
                                                                              25

and including the day following such Registration Default to but excluding
the day on which such Registration Default has been cured. Additional
Interest will be paid semi-annually in arrears, with the first semi-annual
payment due on the first Interest Payment Date in respect of the Securities
following the date on which such Additional Interest begins to accrue, and
will accrue at a rate per annum equal to an additional one-half of one
percent (0.50%) of the principal amount of the Securities.

               Whenever in this Security there is a reference, in any context,
to the payment of the principal of, premium, if any, or interest on, or in
respect of, any Security, such mention shall be deemed to include mention of the
payment of Additional Interest payable as described in the preceding paragraph
to the extent that, in such context, Additional Interest is, was or would be
payable in respect of such Security and express mention of the payment of
Additional Interest (if applicable) in any provisions of this Security shall not
be construed as excluding Additional Interest in those provisions of this
Security where such express mention is not made.

               The indebtedness evidenced by this Security is, to the extent
provided in the Indenture, subordinate and subject in right of payment to the
prior payment in full of all Senior Indebtedness, and this Security is issued
subject to the provisions of the Indenture with respect thereto. Each Holder of
this Security, by accepting the same, (a) agrees to and shall be bound by such
provisions, (b) authorizes and directs the Trustee on his behalf to take such
action as may be necessary or appropriate to effectuate the subordination so
provided and (c) appoints the Trustee his attorney-in-fact for any and all such
purposes.

               If an Event of Default shall occur and be continuing, the
principal of all the Securities may be declared due and payable in the manner
and with the effect provided in Article V of the Indenture.

               The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights of the Holders of the Securities
under the Indenture at any time by the Company and the Trustee with the
written consent of the Holders of a majority in aggregate principal amount of
the Securities at the time Outstanding. The Indenture also contains
provisions permitting the Holders of a majority in aggregate principal amount
of the Securities at the time Outstanding, on behalf of the Holders of all
the Securities, to waive compliance by the Company with certain provisions of
the Indenture and certain past defaults under the Indenture and their
consequences. Any such consent or waiver by the Holder of this Security shall
be written, with a copy delivered to the Trustee, and shall be conclusive and
binding upon such Holder and upon all future Holders of this Security and of
any Security issued upon the registration of transfer hereof or in exchange
herefor

<PAGE>
                                                                              26

or in lieu hereof, whether or not notation of such consent or waiver is made
upon this Security.

               No reference herein to the Indenture and no provision of this
Security or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to pay the principal of,
premium, if any, and interest on (including Additional Interest) this
Security at the times, place and rate, and in the coin or currency, herein
prescribed or to convert this Security as provided in the Indenture.

               As provided in the Indenture and subject to certain limitations
therein set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
Corporate Trust Office duly endorsed by, or accompanied by a written instrument
of transfer in form satisfactory to the Company and the Security Registrar duly
executed by, the Holder hereof or his attorney duly authorized in writing, and
thereupon one or more new Securities, of authorized denominations and for the
same aggregate principal amount, will be issued to the designated transferee or
transferees.

               The Securities are issuable only in registered form without
coupons in denominations of U.S.$1,000 and any integral multiple thereof. As
provided in the Indenture and subject to certain limitations therein set forth,
Securities are exchangeable for a like aggregate principal amount of Securities
of a different authorized denomination, as requested by the Holder surrendering
the same.

               No service charge shall be made for any such registration of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

               Prior to due presentment of this Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name this Security is registered as the owner
hereof for all purposes, whether or not payment of or on this Security is
overdue, and neither the Company, the Trustee nor any such agent shall be
affected by notice to the contrary.

               Interest on this Security shall be computed on the basis of a
360-day year of twelve 30-day months.

               All terms used in this Security which are defined in the
Indenture shall have the meanings assigned to them in the Indenture.

               THE INDENTURE AND THIS SECURITY SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF

<PAGE>
                                                                              27

THE STATE OF NEW YORK WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES.

               SECTION 2.04.  FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

               This is one of the Securities referred to in the within-mentioned
Indenture.

Dated:                                         The Bank of New York, not in its
                                        individual capacity but solely as
                                 Trustee

                                              By________________________________
                                                AUTHORIZED SIGNATORY

               SECTION 2.05. FORM OF CONVERSION NOTICE.

                                CONVERSION NOTICE

To:  Affymetrix, Inc.

               The undersigned Holder of this Security hereby irrevocably
exercises the option to convert this Security, or the portion hereof (which is
U.S.$1,000 or an integral multiple thereof) below designated, at any time
following the date of original issuance thereof, into shares of Common Stock in
accordance with the terms of the Indenture referred to in this Security, and
directs that the shares issuable and deliverable upon conversion, together with
any check in payment for a fractional share and any Security representing any
unconverted principal amount hereof, be issued and delivered to the registered
owner hereof unless a different name has been provided below. If shares or any
portion of this Security not converted are to be issued in the name of a person
other than the undersigned, the undersigned will pay all transfer taxes payable
with respect thereto and is delivering herewith a certificate in proper form
certifying that the applicable restrictions on transfer have been complied with.
Any amount required to be paid by the undersigned on account of interest
accompanies this Security.

<PAGE>
                                                                              28

               The Applicant hereby agrees that, promptly after request of the
Company, he or it will furnish such proof in support of this certification as
the Company or the Security Registrar for the Common Stock may, from time to
time, request.

Dated:                                  ________________________________________
                                              Signature*

                                              __________________________________
                                              Signature Guaranty

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------
<S>                                     <C>
If shares or Securities are to be       Principal amount to be
registered in the name of                converted (if less than all): $____,000
Person other than the Holder,
please print such Person's
name and address:*
--------------------------------------------------------------------------------
                    Name                         Social Security or
                                            Taxpayer Identification Number
--------------------------------------------------------------------------------

  ------------------------------------
               Street Address
--------------------------------------------------------------------------------

  ------------------------------------
          City, state and Zip Code
--------------------------------------------------------------------------------
</TABLE>

* Signature(s) must be guaranteed by an eligible guarantor institution (banks,
stock brokers, savings and loan associations and credit unions with membership
in an approved signature guarantee medallion program) pursuant to Securities and
Exchange Commission Rule 17Ad-15 if shares of Common Stock are to be delivered,
or unconverted Securities are to be issued, other than to and in the name of the
registered owner.

               SECTION 2.06.  FORM OF PURCHASE NOTICE.

               ELECTION OF HOLDER TO REQUIRE PURCHASE

               1. Pursuant to Section 14.01 of the Indenture, the undersigned
hereby elects to have this Security purchased by the Company.

<PAGE>
                                                                              29

               2. The undersigned hereby directs the Trustee or the Company to
pay it or ________________ an amount in cash, or, at the Company's election,
Common Stock valued as set forth in the Indenture, equal to 100% of the
principal amount to be purchased (as set forth below), plus interest accrued to
the Purchase Date, as provided in the Indenture.

                                        Dated:__________________________________

                                        ________________________________________
                                              Signature

                                        ________________________________________
                                             Signature Guaranteed

Principal amount to be purchased (must be an integral multiple of U.S. $1,000):

Remaining principal amount following such purchase:

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

NOTICE: The signature to the foregoing Election must correspond to the Name as
written upon the face of this Security in every particular, without alteration
or any change whatsoever.
<PAGE>

                                                                             30

               SECTION 2.07. FORM OF CERTIFICATION. Whenever any certification
is required to be given to evidence compliance with certain restrictions
relating to transfers of Restricted Securities contemplated by Section
3.05(b)(iv), Section 3.05(c) or Section 13.02, such certification shall be
provided substantially in the form of the following certificate, with only such
changes as shall be approved by the Company and the Initial Purchasers,

                                 TRANSFER CERTIFICATE

               The undersigned Holder hereby certifies with respect to
U.S.$____ principal amount of the above-captioned securities presented or
surrendered on the date hereof (the "Surrendered Securities") for
registration of transfer, or for exchange or conversion where the securities
issuable upon such exchange or conversion are to be registered in a name
other than that of the undersigned Holder (each such transaction being a
"transfer"), that such transfer complies with the restrictive legend set
forth on the face of the Surrendered Securities for the reason checked below:

                      The transfer of the Surrendered Securities complies with
                      Rule 144 under the U.S. Securities Act of 1933 (the
                      "Securities Act"); or

                      The transfer of the Surrendered Securities complies with
                      Rule 144A under the Securities Act; or

                      The transfer of the Surrendered Securities is pursuant to
                      an effective registration statement under the Securities
                      Act, the prospectus delivery requirements under the
                      Securities Act have been satisfied with respect to such
                      transfer, the undersigned Holder is named as a "Selling
                      Securityholder" in the prospectus relating to such
                      registration statement, or in amendments or supplements
                      thereto, and the aggregate principal amount of Surrendered
                      Securities transferred are all or a portion of the
                      securities listed in such prospectus opposite the
                      undersigned's name.

Dated:_________________*
* To be dated the date of surrender.

                                        ________________________________________
                                               Signature

                                        (If the registered owner is a
                                        corporation, partnership or fiduciary,
                                        the title of the

<PAGE>

                                                                             31

                                        Person signing on behalf of such
                                        registered owner must be stated.)

                                   ARTICLE III

                                 THE SECURITIES

               SECTION 3.01. TITLE AND TERMS. The aggregate principal amount of
Securities which may be authenticated and delivered under this Indenture is
limited to (a) U.S.$175,000,000 plus (b) such aggregate principal amount (which
may not exceed U.S.$50,000,000 principal amount) of Securities as may be
purchased by the Initial Purchasers pursuant to the Initial Purchasers' option
pursuant to the Purchase Agreement dated February 8, 2000, between the Company
and the Initial Purchasers, except for Securities authenticated and delivered
upon registration of transfer of, or in exchange for, or in lieu of, other
Securities pursuant to Sections 3.04, 3.05, 3.06, 9.06, 11.08, 13.02 or 14.06
and except for Securities which, pursuant to Section 3.03, are deemed never to
have been authenticated and delivered hereunder.

               The Stated Maturity of the Securities shall be February 15, 2007,
and they shall bear interest at the rate of 4.75% per annum, payable
semi-annually on February 15 and August 15 of each year commencing on August 15,
2000, until the principal thereof is paid or made available for payment.

               Payment of the principal of, premium, if any, and interest
(including payment of any Additional Interest) on this Security will be made at
the Corporate Trust Office, in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and
private debts by a U.S. Dollar check drawn on an account maintained with a bank
in the Borough of Manhattan, The City of New York; PROVIDED, HOWEVER, that upon
written application by the Holder to the Security Registrar setting forth wire
instructions not later than 15 days prior to the relevant payment date (in the
case of payment of principal) or not later than the relevant Record Date (in the
case of payment of interest), such Holder may receive payment by wire transfer
of Dollars to a U.S. Dollar account maintained by the payee with a bank in the
United States or in Europe and designated by the payee to the Security
Registrar.

               The Securities shall be redeemable by the Company as provided in
Article XI.

               The Securities shall be subordinated in right of payment to the
prior payment in full of Senior Indebtedness as provided in Article XII.

               The Securities shall be convertible as provided in Article XIII.

<PAGE>

                                                                             32

               The Securities shall be subject to purchase by the Company at the
option of the Holder as provided in Article XIV.

               SECTION 3.02. DENOMINATIONS. The Securities shall be issuable
only in registered form without coupons and only in denominations of U.S.$1,000
and any integral multiple thereof.

               SECTION 3.03. EXECUTION, AUTHENTICATION, DELIVERY AND DATING. The
Securities shall be executed on behalf of the Company by any of its Chairman of
the Board, its Vice Chairman of the Board, its President or one of its Vice
Presidents. The signature of any of these officers on the Securities may be
manual or facsimile.

               Securities bearing the manual or facsimile signatures of
individuals who were at any time the proper officers of the Company shall bind
the Company, notwithstanding that such individuals or any of them have ceased to
hold such offices prior to the authentication and delivery of such Securities or
did not hold such offices at the date of such Securities.

               At any time and from time to time after the execution and
delivery of this Indenture, the Company may deliver Securities of any series
executed by the Company to the Trustee for authentication, together with a
Company Order for the authentication and delivery of such Securities; and the
Trustee in accordance with such Company Order shall authenticate and deliver
such Securities as in this Indenture provided and not otherwise.

               Each Security shall be dated the date of its authentication.

               No Security shall be entitled to any benefit under this Indenture
or be valid or obligatory for any purpose unless there appears on such Security
a certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder.

               The Trustee shall have the right to decline to authenticate and
deliver any Securities under this Section if the Trustee, being advised by
counsel, determines that such action may not lawfully be taken or if the Trustee
in good faith shall determine that such action would expose the Trustee to
personal liability to existing Holders.

               SECTION 3.04. GLOBAL AND NON-GLOBAL SECURITIES. (a) GLOBAL
SECURITIES. (i) Each Global Security authenticated under this Indenture shall be
registered in the name of the Depositary designated by the Company for such
Global

<PAGE>

                                                                             33

Security or a nominee thereof and delivered to such Depositary or a nominee
thereof or custodian therefor, and each such Global Security shall constitute
a single Security for all purposes of this Indenture.

               (ii) Notwithstanding any other provision in this Indenture, no
Global Security may be exchanged in whole or in part for Securities registered,
and no transfer of a Global Security in whole or in part may be registered, in
the name of any Person other than the Depositary for such Global Security or a
nominee thereof unless (A) such Depositary (1) has notified the Company and the
Trustee that it is unwilling or unable to continue as Depositary for such Global
Security or (2) has ceased to be a clearing agency registered as such under the
Exchange Act or announces an intention permanently to cease business or in fact
does so, in each case unless a successor Depositary is appointed by the Company,
(B) there shall have occurred and be continuing an Event of Default with respect
to such Global Security, or (C) the Company in its discretion at any time
determines not to have all the Securities represented by a Global Security. Any
Global Security exchanged pursuant to clause (i) above shall be so exchanged in
whole and not in part and any Global Security exchanged pursuant to clause (ii)
or (iii) above may be exchanged in whole or from time to time in part as
directed by the Depositary. Any Security issued in exchange for a Global
Security or any portion thereof shall be a Global Security; PROVIDED that any
such Security so issued that is registered in the name of a Person other than
the Depositary or a nominee thereof shall not be a Global Security.

               (iii) If any Global Security is to be exchanged for other
Securities or cancelled in whole, it shall be surrendered by or on behalf of the
Depositary or its nominee to the Trustee, as Security Registrar, for exchange or
cancellation as provided in this Article III. If any Global Security is to be
exchanged for other Securities or cancelled in part, or if another Security is
to be exchanged in whole or in part for a beneficial interest in any Global
Security, in each case, as provided in Section 3.05, then either (i) such Global
Security shall be so surrendered for exchange or cancellation as provided in
this Article III or (ii) the principal amount thereof shall be reduced or
increased by an amount equal to the portion thereof to be so exchanged or
cancelled, or equal to the principal amount of such other Security to be so
exchanged for a beneficial interest therein, as the case may be, by means of an
appropriate adjustment made on the records of the Trustee, as Security
Registrar, whereupon the Trustee, in accordance with the Applicable Procedures,
shall instruct the Depositary or its authorized representative to make a
corresponding adjustment to its records. Upon any such surrender or adjustment
of a Global Security, the Trustee shall, subject to Section 3.05(c) and as
otherwise provided in this Article III, authenticate and deliver any Securities
issuable in exchange for such Global Security (or any portion thereof) to or
upon the order of, and registered in such names as may be directed by, the
Depositary or its authorized representative. Upon the request of the Trustee in
connection with the occurrence of any of the events specified in the preceding
paragraph, the Company shall promptly make available to the Trustee a reasonable
supply of Securities that are not in the form of Global Securities. The Trustee

<PAGE>

                                                                             34

shall be entitled to rely upon any order, direction or request of the Depositary
or its authorized representative which is given or made pursuant to this Article
III if such order, direction or request is given or made in accordance with the
Applicable Procedures.

               (iv) Every Security authenticated and delivered upon registration
of transfer of, or in exchange for or in lieu of, a Global Security or any
portion thereof, whether pursuant to this Article III or otherwise, shall be
authenticated and delivered in the form of, and shall be, a Global Security,
unless such Security is registered in the name of a Person other than the
Depositary for such Global Security or a nominee thereof, in which case such
Security shall be authenticated and delivered in definitive, fully registered
form, without interest coupons.

               (v) The Depositary or its nominee, as registered owner of a
Global Security, shall be the Holder of such Global Security for all purposes
under the Indenture and the Securities, and owners of beneficial interests in a
Global Security shall hold such interests pursuant to the Applicable Procedures.
Accordingly, any such owner's beneficial interest in a Global Security will be
shown only on, and the transfer of such interest shall be effected only through,
records maintained by the Depositary or its nominee or its Agent Members and
such owners of beneficial interests in a Global Security will not be considered
the owners or holders thereof. Notwithstanding the foregoing, nothing herein
shall prevent the Company, the Trustee or any agent of the Company or the
Trustee from giving effect to any written certification, proxy or other
authorization furnished by the Depositary or such nominee, as the case may be,
or impair, as between the Depositary, its Agent Members and any other person on
whose behalf an Agent Member may act, the operation of customary practices of
such Persons governing the exercise of the rights of a holder of any Security.

               SECTION 3.05.  REGISTRATION; REGISTRATION OF TRANSFER AND
EXCHANGE. (a)  The Company shall cause to be kept at the Corporate Trust
Office of the Trustee a register (the register maintained in such office and
in any other office or agency designated pursuant to Section 10.02 being
herein sometimes collectively referred to as the "Security Register") in
which, subject to such reasonable regulations as it may prescribe, the
Company shall provide for the registration of Securities and of transfers and
exchanges thereof. The Trustee is hereby appointed "Security Registrar" for
the purpose of registering Securities and transfers and exchanges thereof as
herein provided. Upon surrender for registration of transfer or exchange of
any Security at an office or agency of the Company designated pursuant to
Section 10.02 for such purpose, accompanied by a written instrument of
transfer or exchange in the form provided by the Company, the Company shall
execute, and the Trustee shall authenticate and deliver, in the name of the
designated transferee or transferees, one or more new Securities of any
authorized denominations and of a like aggregate principal amount.
<PAGE>

                                                                            35

               (b) Notwithstanding any other provisions of this Indenture or the
Securities, transfers and exchanges of Securities and beneficial interests in a
Global Security of the kinds specified in this Section 3.05(b) shall be made
only in accordance with this Section 3.05(b).

               (i) TRANSFER OF GLOBAL SECURITY. Other than as set forth in
        Section 3.04(a), a Global Security may not be transferred, in whole or
        in part, to any Person other than the Depositary or a nominee thereof,
        and no such transfer to any such other Person may be registered;
        PROVIDED that this Section 3.05(b)(i) shall not prohibit any transfer of
        a Security that is issued in exchange for a Global Security but is not
        itself a Global Security. No transfer of a Security to any Person shall
        be effective under this Indenture or the Securities unless and until
        such Security has been registered in the name of such Person. Nothing in
        this Section 3.05(b)(i) shall prohibit or render ineffective any
        transfer of a beneficial interest in a Global Security effected in
        accordance with the other provisions of this Section 3.05(b).

               (ii) TRANSFER OF BENEFICIAL INTERESTS IN THE GLOBAL SECURITY.
        Transfer of beneficial interests in the Global Security shall be
        effected through the Depositary, in accordance with this Indenture
        (including applicable restrictions on transfer set forth herein, if any)
        and the procedures of the Depositary therefor, if applicable.

               (iii) OTHER EXCHANGES. In the event that a Global Security or any
        portion thereof is exchanged for Securities other than Global
        Securities, such other Securities may in turn be exchanged (on transfer
        or otherwise) for Securities that are not Global Securities or for
        beneficial interests in a Global Security (if any is then outstanding)
        only in accordance with such procedures, which shall be substantially
        consistent with the provisions of this Section 3.05(b) (including the
        certification requirements set forth on the reverse of the Security
        intended to insure that transfers of beneficial interests in a Global
        Security comply with Rule 144A or Rule 144 under the Securities Act, as
        the case may be) and any Applicable Procedures, as may be from time to
        time adopted by the Company and the Trustee.

               (iv) TRANSFER AND EXCHANGE OF DEFINITIVE SECURITIES. When
        definitive Securities are presented to the Security Registrar with a
        request:

                      (A) to register the transfer of such definitive
               Securities; or

<PAGE>

                                                                            36

                      (B) to exchange such definitive Securities for an equal
               principal amount of definitive Securities of other authorized
               denominations, the Security Registrar shall register the transfer
               or make the exchange as requested if its reasonable requirements
               for such transaction are met; PROVIDED, HOWEVER, that the
               definitive Securities surrendered for transfer or exchange:

                             (x) shall be duly endorsed or accompanied by a
                      written instrument of transfer in form reasonably
                      satisfactory to the Company and the Security Registrar,
                      duly executed by the Holder thereof or his attorney duly
                      authorized in writing; and

                             (y) are being transferred or exchanged pursuant to
                      an effective registration statement under the Securities
                      Act, pursuant to Section 3.05(b)(v), or pursuant to clause
                      (1), (2) or (3) below, and are accompanied by the
                      following additional information and documents, as
                      applicable:

                                    (1) if such definitive Securities are being
                             delivered to the Security Registrar by a Holder for
                             registration in the name of such Holder, without
                             transfer, a certification from such Holder to that
                             effect (in the form set forth in Section 2.07); or

                                    (2) if such definitive Securities are being
                             transferred to the Company, a certification to that
                             effect (in the form set forth in Section 2.07); or

                                    (3) if such definitive Securities are being
                             transferred pursuant to an exemption from
                             registration in accordance with Rule 144, (i) a
                             certification to that effect (in the form set forth
                             in Section 2.07) and (ii) if the Company or
                             Security Registrar so requests, an opinion of
                             counsel or other evidence reasonably satisfactory
                             to them as to the compliance with the restrictions
                             set forth in the legend set forth in Section 2.02.

<PAGE>

                                                                            37

               (v) RESTRICTIONS ON TRANSFER OF A DEFINITIVE SECURITY FOR A
        BENEFICIAL INTEREST IN A GLOBAL SECURITY. A definitive Security may not
        be exchanged for a beneficial interest in a Global Security except upon
        satisfaction of the requirements set forth below. Upon receipt by the
        Trustee of a definitive Security, duly endorsed or accompanied by
        appropriate instruments of transfer, in form satisfactory to the
        Trustee, together with:

                      (A) certification in the form set forth on the reverse of
               the Security that such definitive Security is being transferred
               to a Qualified Institutional Buyer in accordance with Rule 144A;
               and

                      (B) written instructions directing the Trustee to make, or
               to direct the Securities Registrar to make, an adjustment on its
               books and records with respect to such Global Security to reflect
               an increase in the aggregate principal amount of the Securities
               represented by the Global Security, such instructions to contain
               information regarding the Depositary account to be credited with
               such increase,

        then the Trustee shall cancel such definitive Security and cause, or
        direct the Securities Registrar to cause, in accordance with the
        standing instructions and procedures existing between the Depositary and
        the Securities Registrar, the aggregate principal amount of Securities
        represented by the Global Security to be increased by the aggregate
        principal amount of the definitive Security to be exchanged and shall
        credit or cause to be credited to the account of the Person specified in
        such instructions a beneficial interest in the Global Security equal to
        the principal amount of the definitive Security so cancelled. If no
        Global Securities are then outstanding, the Company shall issue and the
        Trustee shall authenticate, upon written order of the Company in the
        form of an Officers' Certificate, a new Global Security in the
        appropriate principal amount.

               (c) Subject to the succeeding paragraph, every Security shall be
subject to the restrictions on transfer provided in the legends required by
Section 2.02 to be applied to such Security. Whenever any Security is presented
or surrendered for registration of transfer or for exchange for a Security
registered in a name other than that of the Holder, such Security must be
accompanied by a certificate in substantially the form set forth in Section
2.07, dated the date of such surrender and signed by the Holder of such
Security, as to compliance with such restrictions on transfer. The Security
Registrar shall not be required to accept for such registration of transfer or
exchange any Security not so accompanied by a properly completed certificate.

               (d) The restrictions imposed by the legend set forth in the first
or fourth paragraph, as the case may be, of Section 2.02 upon the
transferability of any Security

<PAGE>

                                                                            38

shall cease and terminate when such Security has been sold pursuant to an
effective registration statement under the Securities Act, transferred in
compliance with Rule 144 under the Securities Act (or any successor provision
thereto), or after the second anniversary of the original issuance date of
the Security (or such earlier date after which the Security may be freely
transferred without registration under the Securities Act or without being
subject to transfer restrictions pursuant to the Securities Act, as may be
provided in Rule 144(k) under the Securities Act (or any successor provision
thereto) or otherwise). Any Security as to which such restrictions on
transfer shall have expired in accordance with their terms or shall have
terminated may, upon surrender of such Security for exchange to the Security
Registrar in accordance with the provisions of this Section 3.05
(accompanied, in the event that such restrictions on transfer have terminated
by reason of a transfer in compliance with Rule 144 or any successor
provision, by an opinion of counsel having substantial experience in practice
under the Securities Act and otherwise reasonably acceptable to the Company,
addressed to the Company and in form acceptable to the Company, to the effect
that the transfer of such Security has been made in compliance with Rule 144
or such successor provision), be exchanged for a new Security, of like tenor
and aggregate principal amount, which shall not bear the restrictive legend
set forth in the first paragraph of Section 2.02. The Company shall inform
the Trustee of the effective date of any registration statement registering
the Securities under the Securities Act. The Trustee shall not be liable for
any action taken or omitted to be taken by it in good faith in accordance
with the aforementioned opinion of counsel or notice of an effective
registration statement.

               (e) As used in the preceding two paragraphs (c) and (d) of this
Section 3.05, the term "transfer" encompasses any sale, pledge, transfer,
hypothecation or other disposition of any Security.

               (f) No service charge shall be made for any registration of
transfer or exchange of Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
connection with any registration of transfer or exchange of Securities, other
than exchanges pursuant to Section 3.04, 9.06, 11.08, 13.02 or 14.06 not
involving any transfer.

               (g) The Company shall not be required (i) to issue, register the
transfer of or exchange any Security during a period beginning at the opening of
business 15 days before the day of the mailing of a notice of redemption of
Securities selected for redemption under Section 11.04 and ending at the close
of business on the day of such mailing, or (ii) to register the transfer of or
exchange any Security so selected for redemption in whole or in part, except the
unredeemed portion of any Security being redeemed in part.

<PAGE>

                                                                            39

               SECTION 3.06. MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES.
If any mutilated Security is surrendered to the Trustee, the Company shall
execute and the Trustee shall authenticate and deliver in exchange therefor a
new Security of like tenor and principal amount and bearing a number not
contemporaneously outstanding.

               If there shall be delivered to the Company and the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of written
notice to the Company or the Trustee that such Security has been acquired by a
bona fide purchaser, the Company shall execute and the Trustee shall
authenticate and deliver, in lieu of any such destroyed, lost or stolen
Security, a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

               In case any such mutilated, destroyed, lost or stolen Security
has become or is about to become due and payable, the Company in its discretion,
but subject to any conversion rights, may, instead of issuing a new Security,
pay such Security.

               Upon the issuance, authentication and delivery by the Trustee of
any new Security under this Section 3.06, the Company may require the payment of
a sum sufficient to cover any tax or other governmental charge that may be
imposed in relation thereto and any other expenses (including the fees and
expenses of the Trustee) connected therewith.

               Every new Security issued, authenticated and delivered by the
Trustee pursuant to this Section 3.06 in lieu of any destroyed, lost or stolen
Security shall constitute an original additional contractual obligation of the
Company, whether or not the destroyed, lost or stolen Security shall be at any
time enforceable by anyone, and shall be entitled to all the benefits of this
Indenture equally and proportionately with any and all other Securities duly
issued hereunder.

               The provisions of this Section are exclusive and shall preclude
(to the extent lawful) all other rights and remedies with respect to the
replacement or payment of mutilated, destroyed, lost or stolen Securities.

               SECTION 3.07. PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.
Interest on any Security which is payable, and is punctually paid or duly
provided for, on any Interest Payment Date shall be paid to the Person in whose
name that Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for payment of such interest.

<PAGE>

                                                                            40

               If the Company shall be required by law to deduct any taxes from
any sum of interest payable hereunder to a Holder, (i) the Company shall make
such deductions and shall pay the full amount deducted to the relevant taxing
authority in accordance with applicable law and (ii) the amount of such
deduction shall be treated for purposes hereof as a payment of interest.

               Any interest on any Security which is payable, but is not
punctually paid or duly provided for, on any Interest Payment Date (herein
called "Defaulted Interest") shall forthwith cease to be payable to the Holder
on the relevant Regular Record Date by virtue of having been such Holder, and
such Defaulted Interest may be paid by the Company, at its election in each
case, as provided in clause (1) or (2) below:

               (1) The Company may elect to make payment of any Defaulted
        Interest to the Persons in whose names the Securities (or their
        respective Predecessor Securities) are registered at the close of
        business on a Special Record Date for the payment of such Defaulted
        Interest, which shall be fixed in the following manner. The Company
        shall notify the Trustee in writing of the amount of Defaulted Interest
        proposed to be paid on each Security and the date of the proposed
        payment, and at the same time the Company shall deposit with the Trustee
        an amount of money equal to the aggregate amount proposed to be paid in
        respect of such Defaulted Interest or shall make arrangements
        satisfactory to the Trustee for such deposit prior to the date of the
        proposed payment, such money when deposited to be held in trust for the
        benefit of the Persons entitled to such Defaulted Interest as in this
        clause (1) provided. Thereupon, the Trustee shall, on behalf of, and
        upon the instructions of, the Company, fix a Special Record Date for the
        payment of such Defaulted Interest which shall be not more than 15 days
        and not less than 10 days prior to the date of the proposed payment and
        not less than 10 days after the receipt by the Trustee of the notice of
        the proposed payment. The Trustee, in the name and at the expense of the
        Company, shall forward a notice prepared by the Company of the proposed
        payment of such Defaulted Interest and the Special Record Date therefor
        to be mailed, first-class postage prepaid, to each Holder at his address
        as it appears in the Security Register, not less than 10 days prior to
        such Special Record Date at the expense of the Company. Notice of the
        proposed payment of such Defaulted Interest and the Special Record Date
        therefor having been so mailed, such Defaulted Interest shall be paid to
        the Persons in whose names the Securities (or their respective
        Predecessor Securities) are registered at the close of business on such
        Special Record Date and shall no longer be payable pursuant to the
        following clause (2).

               (2) The Company may make payment of any Defaulted Interest in any
        other lawful manner not inconsistent with the requirements of any
        securities exchange on which the Securities may be listed, and upon
        such notice as may be

<PAGE>

                                                                            41

        required by such exchange, if, after written notice given by the
        Company to the Trustee of the proposed payment pursuant to this clause
        (2), such manner of payment shall be deemed practicable by the Trustee.

               Subject to the foregoing provisions of this Section, each
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Security shall carry the rights to interest
accrued and unpaid, and to accrue, which were carried by such other Security.

               In the case of any Security which is converted after any Regular
Record Date and on or prior to the corresponding Interest Payment Date, interest
on such Security whose Stated Maturity is on such Interest Payment Date shall be
deemed to continue to accrue and shall be payable on such Interest Payment Date
notwithstanding such conversion and notwithstanding that such Security may have
been called for redemption on a Redemption Date within such period, and such
interest (whether or not punctually paid or duly provided for) shall be paid to
the Person in whose name that Security (or one or more Predecessor Securities)
is registered at the close of business on such Regular Record Date. Except as
otherwise expressly provided in the immediately preceding sentence, in the case
of any Security which is converted, interest whose Stated Maturity is after the
date of conversion of such Security shall not be payable.

               SECTION 3.08. PERSONS DEEMED OWNERS. Prior to due presentment of
a Security for registration of transfer, the Company, the Trustee and any agent
of the Company or the Trustee may treat the Person in whose name such Security
is registered in the Security Register as the owner of such Security for the
purpose of receiving payment of principal of, premium, if any, and (subject to
Section 3.07) interest on such Security and for all other purposes whatsoever,
whether or not such Security be overdue, and neither the Company, the Trustee
nor any agent of the Company or the Trustee shall be affected by notice to the
contrary.

               SECTION 3.09. CANCELLATION. All Securities surrendered for
payment, redemption, purchase, registration of transfer or exchange or
conversion shall, if surrendered to any Person other than the Trustee, be
delivered to the Trustee and shall be promptly cancelled by it. The Company may
at any time deliver to the Trustee for cancellation any Securities previously
authenticated and delivered hereunder which the Company may have acquired in any
manner whatsoever, and all Securities so delivered shall be promptly cancelled
by the Trustee. No Securities shall be authenticated in lieu of or in exchange
for any Securities cancelled as provided in this Section, except as expressly
permitted by this Indenture. All cancelled Securities held by the Trustee shall
be disposed of as directed by a Company Order; PROVIDED HOWEVER, the Trustee
shall not be required to destroy such cancelled Securities.

<PAGE>

                                                                            42

               SECTION 3.10. COMPUTATION OF INTEREST. Interest on the Securities
shall be computed on the basis of a 360-day year of twelve 30-day months.

               SECTION 3.11 CUSIP NUMBERS. The Company in issuing the Securities
may use "CUSIP" numbers (if then generally in use), and, if so, the Trustee
shall use "CUSIP" numbers in notices of redemption as a convenience to
Holders; PROVIDED that any such notice may state that no representation is
made as to the correctness of such numbers either as printed on the
Securities or as contained in any notice of a redemption and that reliance
may be placed only on the other identification numbers printed on the
Securities, and any such redemption shall not be affected by any defect in or
omission of such numbers. The Company will promptly notify the Trustee of any
change in the "CUSIP" numbers.

                                   ARTICLE IV

                           SATISFACTION AND DISCHARGE

               SECTION 4.01. SATISFACTION AND DISCHARGE OF INDENTURE. This
Indenture shall upon Company Request cease to be of further effect (except as to
any surviving rights of conversion, registration of transfer or exchange of
Securities herein expressly provided for), and the Trustee, at the expense of
the Company, shall execute proper instruments acknowledging satisfaction and
discharge of this Indenture, when

               (1)  either

                      (A) all Securities theretofore authenticated and delivered
               (other than (i) Securities which have been destroyed, lost or
               stolen and which have been replaced or paid as provided in
               Section 3.06 and (ii) Securities for whose payment money has
               theretofore been deposited in trust or segregated and held in
               trust by the Company and thereafter repaid to the Company or
               discharged from such trust, as provided in Section 10.03) have
               been delivered to the Trustee for cancellation;

                      (B) all such Securities not theretofore delivered to the
               Trustee for cancellation

                             (i) have become due and payable, or

                             (ii) will become due and payable at their Stated
                      Maturity within one year, or

<PAGE>

                                                                            43

                             (iii) are to be called for redemption within one
                      year under arrangements satisfactory to the Trustee for
                      the giving of notice of redemption by the Trustee in the
                      name, and at the expense, of the Company,

and the Company, in the case of (i), (ii) or (iii) above, has deposited or
caused to be deposited irrevocably with the Trustee as trust funds in trust for
the benefit of Holders of Outstanding Securities in an amount sufficient to pay
and discharge the entire indebtedness on such Securities not theretofore
delivered to the Trustee for cancellation, for principal (and premium, if any)
and interest to the date of such deposit (in the case of Securities which have
become due and payable) or to the Stated Maturity or Redemption Date, as the
case may be;

               (2) the Company has paid or caused to be paid all other sums
payable hereunder by the Company;

               (3) the Company has delivered to the Trustee an Officers'
        Certificate and an Opinion of Counsel, each stating that all conditions
        precedent herein provided for relating to the satisfaction and discharge
        of this Indenture have been complied with; and

               (4) no Event of Default which, with notice or lapse of time, or
        both, would become an Event of Default with respect to the Securities
        shall have occurred and be continuing on the date of such deposit.

Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 6.07, the obligations of
the Company to any Authenticating Agent under Section 6.14 and, if money shall
have been deposited with the Trustee pursuant to subclause (B) of clause (1) of
this Section, the obligations of the Trustee under Section 4.02 and the last
paragraph of Section 10.03 shall survive.

               SECTION 4.02. APPLICATION OF TRUST MONEY. Subject to the
provisions of the last paragraph of Section 10.03, all money deposited with the
Trustee pursuant to Section 4.01 shall be held in trust and applied by it, in
accordance with the provisions of the Securities and this Indenture, to the
payment, either directly or through any Paying Agent (including the Company
acting as its own Paying Agent) as the Trustee may determine, to the Persons
entitled thereto, of the principal (and premium, if any) and interest for whose
payment such money has been deposited with the Trustee. All moneys deposited
with the Trustee pursuant to Section 4.01 (and held by it or any Paying Agent)
for the payment of Securities subsequently converted shall be returned to the
Company upon Company Request.

<PAGE>

                                                                            44

                                    ARTICLE V

                                    REMEDIES

               SECTION 5.01. EVENTS OF DEFAULT. "Event of Default", wherever
used herein, means any one of the following events (whatever the reason for such
Event of Default and whether it shall be occasioned by the provisions of Article
XII or be voluntary or involuntary or be effected by operation of law or
pursuant to any judgment, decree or order of any court or any order, rule or
regulation of any administrative or governmental body):

               (1) default in the payment of any interest (including Additional
        Interest) upon any Security when it becomes due and payable, and
        continuance of such default for a period of 30 days (whether or not such
        payment is prohibited by the provisions of Article XII); or

               (2) default in the payment of the principal of (or premium, if
        any, on) any Security at its Maturity (whether or not such payment is
        prohibited by the provisions of Article XII); or

               (3) failure by the Company to provide the notice of a Change in
        Control in accordance with Section 14.03 or default in the payment of
        the Purchase Price in respect of any Security on the Purchase Date
        therefor (whether or not such payment is prohibited by the provisions of
        Article XII); or

               (4) default in the performance, or breach, of any covenant or
        warranty of the Company in this Indenture (other than a covenant or
        warranty a default in whose performance or whose breach is elsewhere in
        this Section specifically dealt with), and continuance of such default
        or breach for a period of 60 days after there has been given, by
        registered or certified mail, to the Company by the Trustee or to the
        Company and the Trustee by the Holders of at least 25% in principal
        amount of the Outstanding Securities a written notice specifying such
        default or breach and requiring it to be remedied and stating that such
        notice is a "Notice of Default" hereunder; or

               (5) a default under any bonds, debentures, notes or other
        evidences of indebtedness for money borrowed by the Company or a
        Subsidiary or under any mortgages, indentures or instruments under which
        there may be issued or by which there may be secured or evidenced any
        indebtedness for money borrowed by the Company or a Subsidiary, whether
        such indebtedness now exists or shall hereafter be created which
        indebtedness, individually or in the aggregate, has a principal amount
        outstanding in excess of U.S.$10,000,000, which default shall

<PAGE>

                                                                            45

        constitute a failure to pay any portion of the principal of such
        indebtedness when due and payable after the expiration of any
        applicable grace or cure period with respect thereto or shall have
        resulted in such indebtedness becoming or being declared due and payable
        prior to the date on which it would otherwise have become due and
        payable, without such indebtedness having been discharged, or such
        acceleration having been rescinded or annulled, within a period of 30
        days after there shall have been given, by registered or certified mail,
        to the Company by the Trustee or to the Company and the Trustee by the
        Holders of at least 25% in principal amount of the Outstanding
        Securities a written notice specifying such default and requiring the
        Company to cause such indebtedness to be discharged or cause such
        acceleration to be rescinded or annulled and stating that such notice is
        a "Notice of Default" hereunder; or

               (6) the entry by a court having jurisdiction in the premises of
        (A) a decree or order for relief in respect of the Company or a
        Subsidiary in an involuntary case or proceeding under any applicable
        Federal or State bankruptcy, insolvency, reorganization or other similar
        law or (B) a decree or order adjudging the Company or a Subsidiary
        bankrupt or insolvent, or approving as properly filed a petition seeking
        reorganization, arrangement, adjustment or composition of or in respect
        of the Company or a Subsidiary under any applicable Federal or State
        law, or appointing a custodian, receiver, liquidator, assignee, trustee,
        sequestrator or other similar official of the Company or a Subsidiary or
        of any substantial part of their respective properties, or ordering the
        winding up or liquidation of the affairs of the Company or a Subsidiary,
        and the continuance of any such decree or order for relief or any such
        other decree or order unstayed and in effect for a period of 60
        consecutive days; or

               (7) the commencement by the Company or a Subsidiary of a
        voluntary case or proceeding under any applicable Federal or State
        bankruptcy, insolvency, reorganization or other similar law or of any
        other case or proceeding to be adjudicated a bankrupt or insolvent, or
        the consent by either the Company or a Subsidiary to the entry of a
        decree or order for relief in respect of the Company or a Subsidiary in
        an involuntary case or proceeding under any applicable Federal or State
        bankruptcy, insolvency, reorganization or other similar law or to the
        commencement of any bankruptcy or insolvency case or proceeding against
        either the Company or a Subsidiary, or the filing by either the Company
        or a Subsidiary of a petition or answer or consent seeking
        reorganization or relief under any applicable Federal or State law, or
        the consent by either the Company or a Subsidiary to the filing of such
        petition or to the appointment of or taking possession by a custodian,
        receiver, liquidator, assignee, trustee, sequestrator or other similar
        official of the Company or a Subsidiary or of any substantial part of
        their respective properties, or the making by either the Company or a
        Subsidiary

<PAGE>

                                                                            46

        of an assignment for the benefit of creditors, or the admission by
        either the Company or a Subsidiary  in writing of an inability to pay
        the debts of either the Company or a Subsidiary generally as they become
        due, or the taking of corporate action by the Company or a Subsidiary in
        furtherance of any such action.

               SECTION 5.02. ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.
If an Event of Default (other than an Event of Default specified in Section
5.01(6) or 5.01(7)) occurs and is continuing, then in every such case the
Trustee or the Holders of not less than 25% in principal amount of the
Outstanding Securities may declare the principal of all the Securities to be due
and payable immediately, by a notice in writing to the Company (and to the
Trustee if given by Holders), and upon any such declaration such principal and
any accrued interest (including Additional Interest) thereon shall become
immediately due and payable. If an Event of Default specified in Section 5.01(6)
or 5.01(7) occurs, the principal of, and accrued interest (including Additional
Interest) on, all the Securities shall automatically, and without any
declaration or other action on the part of the Trustee or any Holder, become
immediately due and payable.

               At any time after such a declaration of acceleration has been
made and before a judgment or decree for payment of the money due has been
obtained by the Trustee as hereinafter in this Article V provided, the Holders
of a majority in principal amount of the Outstanding Securities, by written
notice to the Company and the Trustee, may rescind and annul such declaration
and its consequences if

               (1) the Company has paid or deposited with the Trustee a sum
        sufficient to pay

                      (A) all overdue interest (including Additional Interest)
               on all Securities,

                      (B) the principal of (and premium, if any, on) any
               Securities which have become due otherwise than by such
               declaration of acceleration and interest thereon at the rate
               borne by the Securities,

                      (C) to the extent that payment of such interest is lawful,
               interest upon overdue interest at the rate borne by the
               Securities, and

                      (D) all sums paid or advanced by the Trustee hereunder and
               the reasonable compensation, expenses, disbursements and advances
               of the Trustee, its agents and counsel;
        and

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                                                                            47

               (2) all Events of Default, other than the nonpayment of the
        principal of Securities which have become due solely by such declaration
        of acceleration, have been cured or waived as provided in Section 5.13.

No such rescission shall affect any subsequent default or impair any right
consequent thereon.

               SECTION 5.03. COLLECTION OF INDEBTEDNESS AND SUITS FOR
ENFORCEMENT BY TRUSTEE. If

               (1) default is made in the payment of any interest on any
        Security when such interest becomes due and payable and such default
        continues for a period of 30 days, or

               (2) default is made in the payment of the principal of (or
        premium, if any, on) any Security at the Maturity thereof,

the Trustee is authorized to recover judgment in its own name and as trustee of
an express trust against the Company for the whole amount then due and payable
on such Securities for principal (and premium, if any) and interest, and, to the
extent that payment of such interest shall be legally enforceable, interest on
any overdue principal (and premium, if any) and on any overdue interest, at the
rate borne by the Securities, and, in addition thereto, such further amount as
shall be sufficient to cover the costs and expenses of collection, including the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel.

               If an Event of Default occurs and is continuing, the Trustee may
in its discretion proceed to protect and enforce its rights and the rights of
the Holders by such appropriate judicial proceedings as the Trustee shall deem
most effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.

<PAGE>

                                                                            48

               SECTION 5.04. TRUSTEE MAY FILE PROOFS OF CLAIM. In case of any
judicial proceeding relative to the Company (or any other obligor upon the
Securities), its property or its creditors, the Trustee shall be entitled and
empowered, by intervention in such proceeding or otherwise,

               (1) to file and prove a claim for the whole amount of principal
        and interest owing and unpaid in respect of the Securities and to file
        such other papers or documents as may be necessary or advisable in order
        to have the claims of the Trustee (including any claim for the
        reasonable compensation, expenses, disbursements and advances of the
        Trustee, its agents and counsel) and of the Holders allowed in such
        judicial proceeding, and

               (2) to collect and receive any moneys or other property payable
        or deliverable on any such claim and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
other similar official in any such judicial proceeding is hereby authorized
by each Holder to make such payments to the Trustee and, in the event that
the Trustee shall consent to the making of such payments directly to the
Holders, to pay to the Trustee any amount due it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, and any other amounts due the Trustee under Section 6.07.

               No provision of this Indenture shall be deemed to authorize the
Trustee to authorize or consent to or accept or adopt on behalf of any Holder
any plan of reorganization, arrangement, adjustment or composition affecting the
Securities or the rights of any Holder thereof or to authorize the Trustee to
vote in respect of the claim of any Holder in any such proceeding; PROVIDED,
HOWEVER, that the Trustee may, on behalf of the Holders, vote for the election
of a trustee in bankruptcy or similar official and be a member of a creditors'
or other similar committee.

               SECTION 5.05. TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF
SECURITIES. All rights of action and claims under this Indenture or the
Securities may be prosecuted and enforced by the Trustee without the possession
of any of the Securities or the production thereof in any proceeding relating
thereto, and any such proceeding instituted by the Trustee shall be brought in
its own name as trustee of an express trust, and any recovery of judgment shall,
after provision for the payment of the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, be for the
ratable benefit of the Holders of the Securities in respect of which such
judgment has been recovered.

<PAGE>

                                                                            49

               SECTION 5.06. APPLICATION OF MONEY COLLECTED. Any money collected
by the Trustee pursuant to this Article V shall be applied in the following
order, at the date or dates fixed by the Trustee and, in case of the
distribution of such money on account of principal (or premium, if any) or
interest, upon presentation of the Securities and the notation thereon of the
payment if only partially paid and upon surrender thereof if fully paid:

               FIRST: to the payment of all amounts due the Trustee under
        Section 6.07;

               SECOND: subject to Article XII, to the payment of the amounts
        then due and unpaid for first, interest (including Additional Interest)
        on, and, second, for principal of (and premium, if any, on) the
        Securities in respect of which or for the benefit of which such money
        has been collected, ratably, without preference or priority of any kind,
        according to the amounts due and payable on such Securities for interest
        and principal (and premium, if any) respectively;

               THIRD:  the balance, if any, to the Person or Persons entitled
        thereto, as their interest may appear or as a court of competent
        jurisdiction shall direct; and

               FOURTH:  to the Company.

               SECTION 5.07. LIMITATION ON SUITS. No Holder of any Security
shall have any right to institute any proceeding, judicial or otherwise, with
respect to this Indenture, or for the appointment of a receiver or trustee, or
for any other remedy hereunder, unless

               (1) such Holder has previously given written notice to a
        Responsible Officer the Trustee of a continuing Event of Default;

               (2) the Holders of not less than 25% in principal amount of the
        Outstanding Securities shall have made written request to the Trustee to
        institute proceedings in respect of such Event of Default in its own
        name as Trustee hereunder;

               (3) such Holder or Holders have offered to the Trustee written
        indemnity satisfactory to it (which indemnity shall not be unreasonable)
        against the costs, expenses and liabilities to be incurred in compliance
        with such request;

               (4) the Trustee for 60 days after its receipt of such notice,
        request and offer of indemnity has failed to institute any such
        proceeding; and

<PAGE>

                                                                            50

               (5) no direction inconsistent with such written request has been
        given to the Trustee during such 60-day period by the Holders of a
        majority in principal amount of the Outstanding Securities;

it being understood and intended that no one or more of such Holders shall have
any right in any manner whatever by virtue of, or by availing of, any provision
of this Indenture to affect, disturb or prejudice the fights of any other of
such Holders, or to obtain or to seek to obtain priority or preference over any
other of such Holders or to enforce any right under this Indenture, except in
the manner herein provided and for the equal and ratable benefit of all of such
Holders.

               SECTION 5.08. UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE
PRINCIPAL, PREMIUM AND INTEREST AND TO CONVERT. Notwithstanding any other
provision in this Indenture, the Holder of any Security shall have the right,
which is absolute and unconditional, to receive payment of the principal of (and
premium, if any) and (subject to Section 3.07) interest on such Security on the
respective Stated Maturities expressed in such Security (or, in the case of
redemption or purchase, on the Redemption Date or Purchase Date, as the case may
be) and to convert such Security in accordance with Article XIII and to
institute suit for the enforcement of any such payment and right to convert, and
such rights shall not be impaired without the consent of such Holder.

               SECTION 5.09. RESTORATION OF RIGHTS AND REMEDIES. If the Trustee
or any Holder has instituted any proceeding to enforce any right or remedy under
this Indenture and such proceeding has been discontinued or abandoned for any
reason, or has been determined adversely to the Trustee or to such Holder, then
and in every such case, subject to any determination in such proceeding, the
Company, the Trustee and the Holders shall be restored severally and
respectively to their former positions hereunder and thereafter all rights and
remedies of the Trustee and the Holders shall continue as though no such
proceeding had been instituted.

               SECTION 5.10. RIGHTS AND REMEDIES CUMULATIVE. Except as otherwise
provided with respect to the replacement or payment of mutilated, destroyed,
lost or stolen Securities in the last paragraph of Section 3.06, no right or
remedy herein conferred upon or reserved to the Trustee or to the Holders is
intended to be exclusive of any other right or remedy, and every right and
remedy shall, to the extent permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or otherwise. The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.

               SECTION 5.11. DELAY OR OMISSION NOT WAIVER. No delay or omission
of the Trustee or of any Holder of any Securities to exercise any right or
remedy accruing upon any Event of Default shall impair any such right or remedy
or constitute a waiver of

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                                                                            51

any such Event of Default or an acquiescence therein. Every right and remedy
given by this Article V or by law to the Trustee or to the Holders may be
exercised from time to time, and as often as may be deemed expedient, by the
Trustee or by the Holders, as the case may be.

               SECTION 5.12. CONTROL BY HOLDERS. The Holders of a majority in
principal amount of the Outstanding Securities shall have the right to direct
the time, method and place of conducting any proceeding for any remedy available
to the Trustee or exercising any trust or power conferred on the Trustee;
PROVIDED that the Trustee may seek the advice of counsel and

               (1) such direction shall not be in conflict with any rule of law
        or with this Indenture, and

               (2) the Trustee may take any other action deemed proper by the
        Trustee which is not inconsistent with such direction.

               SECTION 5.13. WAIVER OF PAST DEFAULTS. The Holders of not less
than a majority in principal amount of the Outstanding Securities may on behalf
of the Holders of all the Securities waive any past default hereunder and its
consequences, except a default

               (1) in the payment of the principal of (or premium, if any) or
        interest on any Security, or

               (2) in respect of a covenant or provision hereof which under
        Article IX cannot be modified or amended without the consent of the
        Holder of each Outstanding Security affected.

               Upon any such waiver, such default shall cease to exist, and any
Event of Default arising therefrom shall be deemed to have been cured, for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon. A copy of such waiver
shall be delivered by the Company to the Trustee.

<PAGE>

                                                                            52

               SECTION 5.14. UNDERTAKING FOR COSTS. In any suit for the
enforcement of any right or remedy under this Indenture, or in any suit against
the Trustee for any action taken, suffered or omitted by it as Trustee, a court
may require any party litigant in such suit to file an undertaking to pay the
costs of such suit, and may assess costs against any such party litigant, having
due regard to the merits and good faith of the claims or defenses made by such
party litigant; PROVIDED, that this Section 5.14 shall not be deemed to
authorize any court to require such an undertaking or to make such an assessment
in any suit instituted by the Trustee or the Company or in any suit for the
enforcement of the right to convert any Security in accordance with Article
XIII.

               SECTION 5.15. WAIVER OF USURY, STAY OR EXTENSION LAWS. The
Company covenants (to the extent that it may lawfully do so) that it will not
at any time insist upon, or plead, or in any manner whatsoever claim or take
the benefit or advantage of, any usury, stay or extension law wherever
enacted, now or at any time hereafter in force, which may affect the
covenants or the performance of this Indenture; and the Company (to the
extent that it may lawfully do so) hereby expressly waives all benefit or
advantage of any such law and covenants that it will not hinder, delay or
impede the execution of any power herein granted to the Trustee, but will
suffer and permit the execution of every such power as though no such law had
been enacted.

                                   ARTICLE VI

                                   THE TRUSTEE

               SECTION 6.01. CERTAIN DUTIES AND RESPONSIBILITIES. (a) Except
during the continuance of an Event of Default,

               (1) the Trustee undertakes to perform such duties and only such
        duties as are specifically set forth in this Indenture, and no implied
        covenants or obligations shall be read into this Indenture against the
        Trustee; and

               (2) in the absence of bad faith on its part, the Trustee may
        conclusively rely, as to the truth of the statements and the correctness
        of the opinions expressed therein, upon certificates or opinions
        furnished to the Trustee and conforming to the requirements of this
        Indenture; but in the case of any such certificates or opinions which by
        any provision hereof are specifically required to be furnished to the
        Trustee, the Trustee shall be under a duty to examine the same to
        determine whether or not they conform to the requirements of this
        Indenture (but need not confirm or investigate the accuracy of
        mathematical calculations or other facts stated therein).

<PAGE>

                                                                            53

               (b) In case an Event of Default has occurred and is continuing,
the Trustee shall exercise such of the rights and powers vested in it by this
Indenture, and use the same degree of care and skill in their exercise, as a
prudent person would exercise or use under the circumstances in the conduct of
his or her own affairs.

               (c) No provision of this Indenture shall be construed to relieve
the Trustee from liability for its own negligent action, its own negligent
failure to act, or its own willful misconduct, EXCEPT that

               (1) this paragraph (c) shall not be construed to limit the effect
        of paragraph (a) of this Section;

               (2) the Trustee shall not be liable for any error of judgment
        made in good faith by a Responsible Officer, unless it shall be proved
        that the Trustee was negligent in ascertaining the pertinent facts;

               (3) the Trustee shall not be liable with respect to any action
        taken or omitted to be taken by it in good faith in accordance with the
        direction of the Holders of a majority in principal amount of the
        Outstanding Securities relating to the time, method and place of
        conducting any proceeding for any remedy available to the Trustee, or
        exercising any trust or power conferred upon the Trustee, under this
        Indenture; and

               (4) no provision of this Indenture shall require the Trustee to
        expend or risk its own funds or otherwise incur any financial liability
        in the performance of any of its duties hereunder, or in the exercise of
        any of its rights or powers.

               (d) Whether or not therein expressly so provided, every provision
of this Indenture relating to the conduct or affecting the liability of or
affording protection to the Trustee (as Trustee, Paying Agent, Authenticating
Agent or Security Registrar) shall be subject to the provisions of this Section.

               SECTION 6.02. NOTICE OF DEFAULTS. Within 90 days after the
occurrence of any default hereunder, the Trustee shall give the Holders, in the
manner provided in Section 1.06, notice of any default hereunder actually known
to a Responsible Officer of the Trustee; PROVIDED, HOWEVER, that in the case of
any default of the character specified in Section 5.01(3), no such notice to
Holders shall be given until at least 30 days after the occurrence thereof. The
Trustee shall not be deemed to have notice of a default unless (i) the Trustee
has received written notice thereof from the Company or any Holder or (ii) a
Responsible Officer of the Trustee shall have actual knowledge thereof. For the
purpose of this Section, the term "default" means any event which is, or after
notice or lapse of time or both would become, an Event of Default.

<PAGE>

                                                                            54

               SECTION 6.03. CERTAIN RIGHTS OF TRUSTEE. Subject to the
provisions of Section 6.01:

               (a) the Trustee may conclusively rely and shall be protected in
        acting or refraining from acting upon any resolution, certificate,
        statement, instrument, opinion, report, notice, request, direction,
        consent, order, bond, debenture, note, other evidence of indebtedness or
        other paper or document believed by it to be genuine and to have been
        signed or presented by the proper party or parties;

               (b) any request or direction of the Company mentioned herein
        shall be sufficiently evidenced by a Company Request or Company Order
        and any resolution of the Board of Directors shall be sufficiently
        evidenced by a Board Resolution;

               (c) whenever in the administration of this Indenture the Trustee
        shall deem it desirable that a matter be proved or established prior to
        taking, suffering or omitting any action hereunder, the Trustee (unless
        other evidence be herein specifically prescribed) may require and, in
        the absence of bad faith on its part, conclusively rely upon an Opinion
        of Counsel and Officers' Certificate;

               (d) the Trustee may consult with counsel of its selection and the
        advice of such counsel or any Opinion of Counsel shall be full and
        complete authorization and protection in respect of any action taken,
        suffered or omitted by it hereunder in good faith and in reliance
        thereon;

               (e) the Trustee shall be under no obligation to exercise any of
        the rights or powers vested in it by this Indenture at the request or
        direction of any of the Holders pursuant to this Indenture, unless such
        Holders shall have offered to the Trustee security or indemnity
        satisfactory to the Trustee (which security or indemnity shall not be
        unreasonable) against the costs, expenses and liabilities which might be
        incurred by it in compliance with such request or direction;

               (f) the Trustee shall not be bound to make any investigation into
        the facts or matters stated in any resolution, certificate, statement,
        instrument, opinion, report, notice, request, direction, consent, order,
        bond, debenture, note, other evidence of indebtedness or other paper or
        document, but the Trustee, in its discretion, may make such further
        inquiry or investigation into such facts or matters as it may see fit,
        and, if the Trustee shall determine to make such further inquiry or
        investigation, it shall be entitled to examine the books, records and
        premises of the Company, personally or by agent or attorney at the
        Company's expense; and

<PAGE>

                                                                            55
               (g) the Trustee may execute any of the trusts or powers hereunder
        or perform any duties hereunder either directly or by or through agents
        or attorneys and the Trustee shall not be responsible for any misconduct
        or negligence on the part of any agent or attorney appointed with due
        care by it hereunder.

               (h) no provision of this Indenture shall require the Trustee to
        expend or risk its own funds or otherwise incur any financial liability
        in the performance of any of its duties hereunder, or in the exercise of
        any of its rights or powers.

               SECTION 6.04. NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF
SECURITIES. The recitals contained herein and in the Securities, except the
Trustee's certificates of authentication, shall be taken as the statements of
the Company, and neither the Trustee nor any Authenticating Agent assumes any
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities. Neither the
Trustee nor any Authenticating Agent shall be accountable for the use or
application by the Company of Securities or the proceeds thereof.

               SECTION 6.05. MAY HOLD SECURITIES. The Trustee, any
Authenticating Agent, any Paying Agent, any Security Registrar or any other
agent of the Company, in its individual or any other capacity, may become the
owner or pledgee of Securities and, subject to Section 6.08 and Section 6.13,
may otherwise deal with the Company with the same rights it would have if it
were not Trustee, Authenticating Agent, Paying Agent, Security Registrar or such
other agent.

               SECTION 6.06. MONEY HELD IN TRUST. Money held by the Trustee in
trust hereunder need not be segregated from other funds except to the extent
required by law. The Trustee shall be under no liability for interest on any
money received by it hereunder except as otherwise agreed with the Company in
writing.

               SECTION 6.07.  COMPENSATION AND REIMBURSEMENT.  The Company
agrees:

               (1) to pay to the Trustee from time to time such compensation as
        shall be agreed in writing between the Company and the Trustee for all
        services rendered by it hereunder (which compensation shall not be
        limited by any provision of law in regard to the compensation of a
        trustee of an express trust);

               (2) except as otherwise expressly provided herein, to reimburse
        the Trustee upon its request for all reasonable expenses, disbursements
        and advances incurred or made by the Trustee in accordance with any
        provision of this Indenture (including the reasonable compensation and
        the expenses and

<PAGE>

                                                                            56
        disbursements of its agents and counsel), except any such expense,
        disbursement or advance as may be attributable to its negligence or
        willful misconduct;

               (3) to indemnify each of the Trustee and any predecessor Trustee
        for, and to hold each harmless against, any loss, liability or expense
        incurred without negligence or willful misconduct on its part, arising
        out of or in connection with the acceptance or administration of this
        trust, including the costs and expenses of defending itself against any
        claim (whether asserted by the Company, a Holder of Securities or any
        other Person) or liability in connection with the exercise or
        performance of any of its powers or duties hereunder. The Trustee shall
        notify the Company of any claim asserted against it for which it may
        seek indemnity;

               (4) all indemnifications and releases from liability granted
        hereunder to the Trustee shall extend to its officers, directors,
        employees, agents, successors and assigns;

               (5) when the Trustee incurs expenses or renders services after
        the occurrence of any Event of Default specified in Section 5.01, the
        expenses and the compensation for the services are intended to
        constitute expenses of administration under any bankruptcy, insolvency
        or similar laws; and

               (6) the obligations of the Company under this Section shall
        survive the satisfaction and discharge of this Indenture.

               SECTION 6.08. DISQUALIFICATION; CONFLICTING INTERESTS. If the
Trustee has or shall acquire a conflicting interest within the meaning of the
Trust Indenture Act, the Trustee shall either eliminate such interest or resign,
to the extent and in the manner provided by, and subject to the provisions of,
the Trust Indenture Act and this Indenture.

               SECTION 6.09. CORPORATE TRUSTEE REQUIRED; ELIGIBILITY. There
shall at all times be a Trustee hereunder which shall be a corporation organized
and doing business under the laws of the United States, authorized under such
laws to exercise corporate trust powers, which shall have (or, in the case of a
corporation included in a bank holding company system, the related bank holding
company shall have) a combined capital and surplus of at least U.S.$50,000,000,
subject to supervision or examination by Federal or State authority, in good
standing and having an established place of business or agency in the Borough of
Manhattan, The City of New York. If such corporation or related bank holding
company publishes reports of condition at least annually, pursuant to law or to
the requirements of said supervising or examining authority, then for the
purposes of this Section, the combined capital and surplus of such corporation
or related bank holding company shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. If at
any time the Trustee shall cease

<PAGE>

                                                                            57
to be eligible in accordance with the provisions of this Section, it shall
resign immediately in the manner and with the effect hereinafter specified in
this Article VI.

               SECTION 6.10. RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.
(a) No resignation or removal of the Trustee and no appointment of a successor
Trustee pursuant to this Article shall become effective until the acceptance of
appointment by the successor Trustee in accordance with the applicable
requirements of Section 6.11.

               (b) The Trustee may resign at any time by giving written notice
thereof to the Company. If the instrument of acceptance by a successor Trustee
required by Section 6.11 shall not have been delivered to the Trustee within 30
days after the giving of such notice of resignation, the resigning Trustee may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

               (c) The Trustee may be removed at any time by Act of the Holders
of a majority in principal amount of the Outstanding Securities, delivered to
the Trustee and to the Company. If the instrument of acceptance by a successor
Trustee required by Section 6.11 shall not have been delivered to the Trustee
within 30 days after the giving of such notice of removal, the removed Trustee
may petition any court of competent jurisdiction for the appointment of a
successor Trustee.

               (d) If at any time:

               (1) the Trustee shall fail to comply with Section 6.08 after
        written request therefor by the Company or by any Holder who has been a
        bona fide Holder of a Security for at least six months, or

               (2) the Trustee shall cease to be eligible under Section 6.09 and
        shall fail to resign after written request therefor by the Company or by
        any such Holder, or

               (3) the Trustee shall become incapable of acting or shall be
        adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
        property shall be appointed or any public officer shall take charge or
        control of the Trustee or of its property or affairs for the purpose of
        rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by a Board Resolution may remove the
Trustee, or (ii) subject to Section 5.14, any Holder who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee.

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                                                                            58
               (e) If the Trustee shall resign, be removed or become incapable
of acting, or if a vacancy shall occur in the office of Trustee for any cause,
the Company, by a Board Resolution, shall promptly appoint a successor Trustee.
If, within one year after such resignation, removal or incapability, or the
occurrence of such vacancy, a successor Trustee shall be appointed by Act of the
Holders of a majority in principal amount of the Outstanding Securities
delivered to the Company and the retiring Trustee, the successor Trustee so
appointed shall, forthwith upon its acceptance of such appointment in accordance
with the applicable requirements of Section 6.11, become the successor Trustee
and to that extent supersede the successor Trustee appointed by the Company. If
no successor Trustee shall have been so appointed by the Company or the Holders
and accepted appointment in the manner required by Section 6.11, any Holder who
has been a bona fide Holder of a Security for at least six months may, on behalf
of himself and all others similarly situated, petition any court of competent
jurisdiction for the appointment of a successor Trustee.

               (f) The Company shall give notice of each resignation and each
removal of the Trustee and each appointment of a successor Trustee to all
Holders in the manner provided in Section 1.06. Each notice shall include the
name of the successor Trustee and the address of its Corporate Trust Office.

               SECTION 6.11. ACCEPTANCE OF APPOINTMENT BY SUCCESSOR. Every
successor Trustee appointed hereunder shall execute, acknowledge and deliver to
the Company and to the retiring Trustee an instrument accepting such
appointment, and thereupon the resignation or removal of the retiring Trustee
shall become effective and such successor Trustee, without any further act, deed
or conveyance, shall become vested with all the rights, powers, trusts and
duties of the retiring Trustee; but, on the request of the Company or the
successor Trustee, such retiring Trustee shall, upon payment of its charges,
execute and deliver an instrument transferring to such successor Trustee all the
rights, powers and trusts of the retiring Trustee and shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee hereunder. Upon request of any such successor Trustee, the
Company shall execute any and all instruments for more fully and certainly
vesting in and confirming to such successor Trustee all such rights, powers and
trusts.

               No successor Trustee shall accept its appointment unless at the
time of such acceptance such successor Trustee shall be qualified and eligible
under this Article VI.

               SECTION 6.12. MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO
BUSINESS. Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to

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                                                                            59
all or substantially all the corporate trust business of the Trustee, shall
be the successor of the Trustee hereunder; PROVIDED such corporation shall be
otherwise qualified and eligible under this Article VI without the execution
or filing of any paper or any further act on the part of any of the parties
hereto. In case any Securities shall have been authenticated, but not
delivered, by the Trustee then in office, any successor by merger, conversion
or consolidation to such authenticating Trustee may adopt such authentication
and deliver the Securities so authenticated with the same effect as if such
successor Trustee had itself authenticated such Securities.

               SECTION 6.13. PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.
If and when the Trustee shall be or become a creditor of the Company (or any
other obligor upon the Securities), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).

               SECTION 6.14. APPOINTMENT OF AUTHENTICATING AGENT. The Trustee
may appoint an Authenticating Agent or Agents which shall be authorized to
act on behalf of the Trustee to authenticate Securities issued upon original
issue and upon exchange, registration of transfer, partial conversion,
partial redemption, or partial purchase or pursuant to Section 3.06, and
Securities so authenticated shall be entitled to the benefits of this
Indenture and shall be valid and obligatory for all purposes as if
authenticated by the Trustee hereunder. Wherever reference is made in this
Indenture to the authentication and delivery of Securities by the Trustee or
the Trustee's certificate of authentication, such reference shall be deemed
to include authentication and delivery on behalf of the Trustee by an
Authenticating Agent and a certificate of authentication executed on behalf
of the Trustee by an Authenticating Agent. Each Authenticating Agent shall be
acceptable to the Company and shall at all times be a corporation organized
and doing business under the laws of the United States, authorized under such
laws to act as Authenticating Agent, which shall have (or, in the case of a
corporation included in a bank holding company system, the related bank
holding company shall have) a combined capital and surplus of not less than
U.S.$50,000,000 and be subject to supervision or examination by Federal or
State authority. If such Authenticating Agent publishes reports of condition
at least annually, pursuant to law or to the requirements of said supervising
or examining authority, then, for the purposes of this Section, the combined
capital and surplus of such Authenticating Agent or related bank holding
company shall be deemed to be its combined capital and surplus as set forth
in its most recent report of condition so published. If at any time an
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, such Authenticating Agent shall resign
immediately in the manner and with the effect specified in this Section.

               Any corporation into which an Authenticating Agent may be merged
or converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party,

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                                                                             60

or any corporation succeeding to all or substantially all the
corporate agency or corporate trust business of an Authenticating Agent, shall
continue to be an Authenticating Agent; PROVIDED such corporation shall be
otherwise eligible under this Section, without the execution or filing of any
paper or any further act on the part of the Trustee or the Authenticating Agent.

               An Authenticating Agent may resign at any time by giving written
notice thereof to the Trustee and to the Company. The Trustee may at any time
terminate the agency of an Authenticating Agent by giving written notice thereof
to such Authenticating Agent and to the Company. Upon receiving such a notice of
resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section 6.14, the Trustee may appoint a successor
Authenticating Agent which shall be acceptable to the Company and shall mail
written notice of such appointment by first-class mail, postage prepaid, to all
Holders as their names and addresses appear in the Security Register. Any
successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all the rights, powers and duties of its predecessor
hereunder, with like effect as if originally named as an Authenticating Agent.
No successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section 6.14.

               The Company agrees to pay to each Authenticating Agent from time
to time compensation for its services under this Section 6.14.

               If an appointment is made pursuant to this Section, the
Securities may have endorsed thereon, in addition to the Trustee's certificate
of authentication, an alternative certificate of authentication in the following
form:

               This is one of the Securities described in the within-mentioned
Indenture.

                                             The Bank of New York

Date:
     ----------------                   ----------------------------------------
                                             As Trustee

                                        By
                                          --------------------------------------
                                             As Authenticating Agent

                                        By
                                          --------------------------------------
                                             Authorized Signatory

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                                                                             61

               SECTION 6.15. APPOINTMENT OF CO-TRUSTEE. Subject to the
qualifications set forth in Section 6.09, the Trustee may appoint an additional
institution as a separate trustee or co-trustee. If the Trustee appoints an
additional institution as a separate trustee or co-trustee, each and every
remedy, power, fight, claim, demand, cause of action, immunity, estate, duty,
obligation, title, interest and lien expressed or intended by this Indenture to
be exercised by, vested in and conveyed by the Trustee with respect thereto
shall be exercisable by, vested in and conveyed to such separate trustee or
co-trustee, but only to the extent necessary to enable such separate trustee or
co-trustee to exercise such powers, rights and remedies, and every covenant and
obligation necessary for the exercise thereby by such separate trustee or
co-trustee shall run to and be enforceable by either of them. Should any
instrument in writing from the Company be required by the separate trustee or
co-trustee so appointed by the Trustee for more fully vesting in and confirming
to them such properties, rights, powers, trusts, duties and obligations, any and
all such instruments in writing shall, on request, be executed, acknowledged and
delivered by the Company. If any separate trustee or co-trustee, or a successor
to either, shall become incapable of acting or not qualified to act, resign or
be removed, all the estate, properties, rights, powers, trusts, duties and
obligations of such separate trustee or co-trustee, so far as permitted by law,
shall vest in and be exercised by the Trustee until the appointment of a
successor to such separate trustee or co-trustee. The appointment of any
separate trustee or co-trustee shall be subject to written approval of the
Company so long as no Event of Default has occurred and is continuing under this
Indenture.

                                   ARTICLE VII

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

               SECTION 7.01.  COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF
HOLDERS.  The Company will furnish or cause to be furnished to the Trustee

               (a) semi-annually, not more than 15 days after each Regular
        Record Date, a list, in such form as the Trustee may reasonably require,
        of the names and addresses of the Holders as of such Regular Record
        Date, and

               (b) at such other times as the Trustee may request in writing,
        within 30 days after the receipt by the Company of any such request, a
        list of similar form and content as of a date not more than 15 days
        prior to the time such list is furnished;

EXCLUDING from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.

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                                                                             62

               SECTION 7.02. PRESERVATION OF INFORMATION; COMMUNICATIONS TO
HOLDERS. (a) The Trustee shall preserve, in as current a form as is reasonably
practicable, the names and addresses of Holders contained in the most recent
list furnished to the Trustee as provided in Section 7.01 and the names and
addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 7.01 upon receipt of a new list so furnished.

               (b) The rights of Holders to communicate with other Holders with
respect to their rights under this Indenture or under the Securities, and the
corresponding rights and duties of the Trustee, shall be as provided by the
Trust Indenture Act.

               (c) Every Holder of Securities, by receiving and holding the
same, agrees with the Company and the Trustee that neither the Company nor the
Trustee nor any agent of either of them shall be held accountable by reason of
any disclosure of information as to names and addresses of Holders made pursuant
to the Trust Indenture Act.

               SECTION 7.03. REPORTS BY TRUSTEE. (a) The Trustee shall transmit
to Holders within 60 days after May 15th of each year such reports concerning
the Trustee and its actions under this Indenture as may be required pursuant to
the Trust Indenture Act at the times and in the manner provided pursuant
thereto.

               (b) A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which the Securities are listed, with the Commission, if applicable, and with
the Company. The Company will promptly notify the Trustee when the Securities
are listed on any stock exchange and of any delisting thereof.

               SECTION 7.04. REPORTS BY COMPANY. (a) The Company shall file with
the Trustee and the Commission, if applicable, and transmit to Holders, such
information, documents and other reports, and such summaries thereof, as may be
required pursuant to the Trust Indenture Act at the times and in the manner
provided pursuant to such Act; PROVIDED that any such information, documents or
reports required to be filed with the Commission pursuant to Section 13 or 15(d)
of the Exchange Act shall be filed with the Trustee within 15 days after the
same is so required to be filed with the Commission. Delivery of such reports,
information and documents to the Trustee is for informational purposes only, and
the Trustee's receipt of such shall not constitute constructive notice of any
information contained therein or determinable from information contained
therein, including the Company's compliance with any of its covenants hereunder
(as to which the Trustee is entitled to rely exclusively on Officers'
Certificates). Notwithstanding

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                                                                             63

anything to the contrary contained herein, the Trustee shall have no duty to
review such documents for the purpose of determining compliance with this
Indenture.

               Delivery of such reports, information and documents to the
Trustee is for informational purposes only and the Trustee's receipt of such
shall not constitute constructive notice of any information contained therein
or determinable from information contained therein, including the Company's
compliance with any of its covenants hereunder (as to which the Trustee is
entitled to rely exclusively on Officers' Certificates).

               (b) The Company shall provide the Trustee with at least 30 days'
prior written notice of any change in location of its principal executive
offices or other principal place of business.

                                  ARTICLE VIII

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

               SECTION 8.01. COMPANY MAY CONSOLIDATE, ETC., ONLY ON CERTAIN
TERMS. The Company shall not consolidate with or merge into any other Person or,
directly or indirectly, convey, transfer, sell, lease or otherwise dispose of
all or substantially all of its properties and assets to any Person, and the
Company shall not permit any Person to consolidate with or merge into the
Company or convey, transfer, sell, lease or otherwise dispose of all or
substantially all of its properties and assets to the Company, unless:

               (1) in case the Company shall consolidate with or merge into
        another Person or convey, transfer or lease its properties and assets
        substantially as an entirety to any Person, the Person formed by such
        consolidation or into which the Company is merged or the Person which
        acquires by conveyance or transfer, or which leases, the properties and
        assets of the Company substantially as an entirety (i) shall be a
        corporation, partnership or trust, (ii) shall be an entity (A) organized
        and validly existing under the laws of the United States of America, any
        State thereof or the District of Columbia or (B) organized and validly
        existing under the laws of a jurisdiction outside of the United States
        of America, with its common stock, or American Depositary Shares
        representing such shares of common stock, traded on a national
        securities exchange in the United States of America or through Nasdaq
        and a worldwide total market capitalization of its equity securities of
        at least U.S. $5 billion, and (iii) shall expressly assume, by an
        indenture supplemental hereto, executed and delivered to the Trustee, in
        form satisfactory to the Trustee, the due and punctual payment of the
        principal of (and premium, if any) and interest (including Additional
        Interest) on all the Securities and the

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                                                                             64

        performance or observance of every covenant of this Indenture on the
        part of the Company to be performed or observed and shall have provided
        for conversion rights in accordance with Article XIII;

               (2) immediately after giving effect to such transaction, no Event
        of Default, and no event which, after notice or lapse of time or both,
        would become an Event of Default, shall have happened and be continuing;
        and

               (3) the Company has delivered to the Trustee an Officers'
        Certificate and an Opinion of Counsel, each stating that such
        consolidation, merger, conveyance, transfer or lease and, if a
        supplemental indenture is required in connection with such transaction,
        such supplemental indenture comply with this Article VIII and that all
        conditions precedent herein provided for relating to such transaction
        have been complied with.

               SECTION 8.02. SUCCESSOR SUBSTITUTED. Upon any consolidation of
the Company with, or merger of the Company into, any other Person or any
conveyance, transfer or lease of the properties and assets of the Company
substantially as an entirety in accordance with Section 8.01, the successor
Person formed by such consolidation or into which the Company is merged or to
which such conveyance, transfer or lease is made shall succeed to, and be
substituted for, and may exercise every right and power of, the Company under
this Indenture with the same effect as if such successor Person had been named
as the Company herein, and thereafter, except in the case of a lease, the
predecessor Person shall be released from its obligations and covenants under
this Indenture and the Securities.

                                   ARTICLE IX

                             SUPPLEMENTAL INDENTURES

               SECTION 9.01. SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.
Without the consent of any Holders, the Company, when authorized by a Board
Resolution, and the Trustee, at any time and from time to time, may enter into
one or more indentures supplemental hereto, in form satisfactory to the Trustee,
for any of the following purposes:

               (1) to evidence the succession of another Person to the Company
        and the assumption by any such successor of the covenants of the Company
        herein and in the Securities; or

<PAGE>
                                                                              65

               (2) to add to the covenants of the Company for the equal and
        ratable benefit of the Holders, or to surrender any right or power
        herein conferred upon the Company; or

               (3) to secure the Company's obligations in respect of the
        Securities; or

               (4) to make provision with respect to the conversion rights of
        Holders pursuant to the requirements of Article XIII; or

               (5) to make any changes or modifications to this Indenture
        necessary in connection with the registration of any Transfer Restricted
        Securities under the Securities Act as contemplated by Section 10.11;
        PROVIDED that such action pursuant to this clause (5) shall not
        adversely affect the interests of the Holders of Securities; or

               (6) to cure any ambiguity, to correct or supplement any provision
        herein which may be inconsistent with any other provision herein, to
        correct or supplement any provision herein which limits, qualifies or
        conflicts with a provision of the Trust Indenture Act which is required
        under such Act to be a part of and govern this Indenture, in any case to
        the extent necessary to qualify this Indenture under the Trust Indenture
        Act, or to make any other provisions with respect to matters or
        questions arising under this Indenture which shall not be inconsistent
        with the provisions of this Indenture; PROVIDED that such action
        pursuant to this clause (6) shall not adversely affect the interests or
        legal rights of the Holders in any material respect.

<PAGE>

                                                                              66

               SECTION 9.02. SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.
With the consent of the Holders of not less than a majority in principal amount
of the Outstanding Securities, by the Act of said Holders delivered to the
Company and the Trustee, the Company, when authorized by a Board Resolution, and
the Trustee may enter into an indenture or indentures supplemental hereto for
the purpose of adding any provisions to or changing in any manner or eliminating
any of the provisions of this Indenture or of modifying in any manner the rights
of the Holders under this Indenture; PROVIDED, HOWEVER, that no such
supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby,

               (1) change the Stated Maturity of the principal of, or any
        installment of interest on, any Security, or reduce the principal amount
        thereof or the rate of interest thereon or any premium payable upon the
        redemption thereof, or change the place of payment where, or the coin or
        currency in which, any Security or any premium or interest thereon is
        payable, or impair the right to institute suit for the enforcement of
        any such payment on or after the Stated Maturity thereof (or, in the
        case of redemption or purchase, on or after the Redemption Date or
        Purchase Date, as the case may be), or adversely affect the right to
        convert any Security as provided in Article XIII (except as permitted by
        Section 9.01(4)), or modify the provisions of this Indenture with
        respect to the subordination of the Securities in a manner adverse to
        the Holders, or modify the redemption provisions in a manner adverse to
        the Holders, or modify the provisions relating to the Company's
        requirement to offer to purchase Notes upon a Change in Control in a
        manner adverse to the Holders, or

               (2) modify any of the provisions of this Section 9.02, Section
        5.13 or Section 10.08, except to increase any such percentage or to
        provide that certain other provisions of this Indenture cannot be
        modified or waived without the consent of the Holder of each Outstanding
        Security affected thereby, or

               (3) modify the obligation of the Company to maintain an office or
        agency in the Borough of Manhattan, The City of New York pursuant to
        Section 10.02, or

               (4) modify any of the provisions of Section 10.09 or Section
        10.10, or

               (5) reduce the percentage in principal amount of the Outstanding
        Securities, the consent of whose Holders is required for any such
        supplemental indenture, or the consent of whose Holders is required for
        any waiver (of compliance with certain provisions of this Indenture or
        certain defaults hereunder and their consequences) provided for in this
        Indenture.

<PAGE>

                                                                              67

               It shall not be necessary for any Act of Holders under this
Section 9.02 to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such Act shall approve the substance
thereof.

               SECTION 9.03. EXECUTION OF SUPPLEMENTAL INDENTURES. In executing,
or accepting the additional trusts created by, any supplemental indenture
permitted by this Article IX or the modifications thereby of the trusts
created by this Indenture, the Trustee shall receive, and (subject to Section
6.01 and Section 6.03) shall be fully protected in relying upon, an Opinion
of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture, complies with its terms and will,
upon the execution and delivery thereof, be valid and binding upon the
Company in accordance with its terms. The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

               SECTION 9.04. EFFECT OF SUPPLEMENTAL INDENTURES. Upon the
execution of any supplemental indenture under this Article, this Indenture shall
be modified in accordance therewith, and such supplemental indenture shall form
a part of this Indenture for all purposes; and every Holder of Securities
theretofore or thereafter authenticated and delivered hereunder shall be bound
thereby.

               SECTION 9.05. CONFORMITY WITH TRUST INDENTURE ACT. Every
supplemental indenture executed pursuant to this Article shall conform to the
requirements of the Trust Indenture Act.

               SECTION 9.06. REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.
Securities authenticated and delivered after the execution of any supplemental
indenture pursuant to this Article may, and shall if required by the Trustee,
bear a notation as to any matter provided for in such supplemental indenture. If
the Company shall so determine, new Securities so modified as to conform, in the
judgment of the Company, to any such supplemental indenture may be prepared and
executed by the Company and authenticated and delivered by the Trustee in
exchange for Outstanding Securities.

                                    ARTICLE X

                                    COVENANTS

               SECTION 10.01. PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST. The
Company will duly and punctually pay the principal of (and premium, if any) and
interest on the Securities in accordance with the terms of the Securities and
this Indenture.

<PAGE>

                                                                              68

               SECTION 10.02. MAINTENANCE OF OFFICE OR AGENCY. The Company will
maintain in the Borough of Manhattan, The City of New York an office or agency
where Securities may be presented or surrendered for payment, where Securities
may be surrendered for registration of transfer or exchange, where Securities
may be surrendered for conversion and where notices and demands to or upon the
Company in respect of the Securities and this Indenture may be served. The
Company will give prompt written notice to the Trustee of the location, and any
change in the location, of such office or agency. If at any time the Company
shall fail to maintain any such required office or agency or shall fail to
furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the Corporate Trust Office of the
Trustee or the office or agency of the Trustee in the Borough of Manhattan, The
City of New York, and the Company hereby appoints the Trustee as its agent to
receive all such presentations, surrenders, notices and demands.
               The Company may also from time to time designate one or more
other offices or agencies (in or outside the Borough of Manhattan, The City
of New York) where the Securities may be presented or surrendered for any or
all such purposes and may from time to time rescind such designations;
PROVIDED, HOWEVER, that no such designation or rescission shall in any manner
relieve the Company of its obligation to maintain an office or agency in the
Borough of Manhattan, The City of New York for such purposes. The Company
will give prompt written notice to the Trustee of any such designation or
rescission and of any change in the location of any such other office or
agency.

               SECTION 10.03. MONEY FOR SECURITY PAYMENTS TO BE HELD IN TRUST.
If the Company shall at any time act as its own Paying Agent, it will, prior to
11:00 a.m., New York City time, on each due date of the principal of (and
premium, if any) or interest (together with any Additional Interest in respect
thereof) on any of the Securities, segregate and hold in trust for the benefit
of the Persons entitled thereto a sum sufficient to pay the principal (and
premium, if any) or interest (together with any Additional Interest in respect
thereof) so becoming due until such sums shall be paid to such Persons or
otherwise disposed of as herein provided and will promptly notify the Trustee of
its action or failure so to act.

               Whenever the Company shall have one or more Paying Agents, it
will, prior to each due date of the principal of (and premium, if any) or
interest (together with any Additional Interest in respect thereof) on any
Securities, deposit with a Paying Agent a sum sufficient to pay such amount,
such sum to be held in trust for the benefit of the Persons entitled to such
principal, premium, if any, or interest, and (unless such Paying Agent is the
Trustee) the Company will promptly notify the Trustee in writing of its action
or failure so to act.

<PAGE>

                                                                              69

               The Company will cause each Paying Agent other than the Trustee
to execute and deliver to the Trustee an instrument in which such Paying Agent
shall agree with the Trustee, subject to the provisions of this Section 10.03,
that such Paying Agent will:

               (1) hold all sums held by it for the payment of the principal of,
        premium, if any, or interest on Securities in trust for the benefit of
        the Persons entitled thereto until such sums shall be paid to such
        Persons or otherwise disposed of as herein provided;

               (2) give the Trustee written notice of any default by the Company
        (or any other obligor upon the Securities) in the making of any payment
        of principal, premium, if any, or interest; and

               (3) at any time during the continuance of any such default, upon
        the written request of the Trustee, forthwith pay to the Trustee all
        sums so held in trust by such Paying Agent.

               The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay,
or by Company Order direct any Paying Agent to pay, to the Trustee all sums
held in trust by the Company or such Paying Agent, such sums to be held by
the Trustee upon the same trusts as those upon which such sums were held by
the Company or such Paying Agent; and, upon such payment by any Paying Agent
to the Trustee, such Paying Agent shall be released from all further
liability with respect to such money.

               Any money deposited with the Trustee or any Paying Agent, or
then held by the Company, in trust for the payment of the principal of (and
premium, if any) or interest (together with any Additional Interest in
respect thereof) on any Security and remaining unclaimed for two years after
such principal (and premium, if any) or interest has become due and payable
shall be paid to the Company on Company Request, or (if then held by the
Company) shall be discharged from such trust; and the Holder of such Security
shall thereafter, as an unsecured general creditor, look only to the Company
for payment thereof, and all liability of the Trustee or such Paying Agent
with respect to such trust money, and all liability of the Company as trustee
thereof, shall thereupon cease; PROVIDED, HOWEVER, that the Trustee or such
Paying Agent, before being required to make any such repayment, may at the
expense of the Company cause to be published once, in a newspaper published
in the English language, customarily published on each Business Day and of
general circulation in the Borough of Manhattan, The City of New York, notice
that such money remains unclaimed and that, after a date specified therein,
which shall not be less than 30 days from the date of such publication, any
unclaimed balance of such money then remaining will be repaid to the Company.

<PAGE>

                                                                             70

               SECTION 10.04. STATEMENT BY OFFICERS AS TO DEFAULT. The Company
shall deliver to the Trustee, within 120 days after the end of each fiscal year
of the Company ending after the date hereof, an Officers' Certificate, stating
whether or not to the best knowledge of the signers thereof the Company is in
default in the performance and observance of any of the terms, provisions and
conditions of this Indenture (without regard to any period of grace or
requirement of notice provided hereunder) and, if the Company shall be in
default, specifying all such defaults and the nature and status thereof of which
they may have knowledge.

               SECTION 10.05. EXISTENCE. Subject to Article VIII, the Company
shall do or cause to be done all things necessary to preserve and keep in full
force and effect its existence, rights (charter and statutory) and franchises;
PROVIDED, HOWEVER, that the Company shall not be required to preserve any such
right or franchise if the Board of Directors shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and that the loss thereof is not disadvantageous in any material
respect to the Holders.

               SECTION 10.06. MAINTENANCE OF PROPERTIES. The Company shall cause
all properties used or useful in the conduct of its business or the business of
any Subsidiary to be maintained and kept in good condition, repair and working
order and supplied with all necessary equipment and shall cause to be made all
necessary repairs, renewals, replacements, betterments and improvements thereof,
all as in the judgment of the Company may be necessary so that the business
carried on in connection therewith may be properly and advantageously conducted
at all times; PROVIDED, HOWEVER, that nothing in this Section 10.06 shall
prevent the Company from discontinuing the operation or maintenance of any of
such properties, or disposing of any of them, if such discontinuance or
disposition is, in the judgment of the Company, desirable in the conduct of its
business or the business of any Subsidiary and not disadvantageous in any
material respect to the Holders.

               SECTION 10.07. PAYMENT OF TAXES AND OTHER CLAIMS. The Company
shall pay or discharge or cause to be paid or discharged, before the same
shall become delinquent, (1) all taxes, assessments and governmental charges
levied or imposed upon the Company or any Subsidiary or upon the income,
profits or property of the Company or any Subsidiary, and (2) all lawful
claims for labor, materials and supplies which, if unpaid, might by law
become a lien upon the property of the Company or any Subsidiary; PROVIDED,
HOWEVER, that the Company shall not be required to pay or discharge or cause
to be paid or discharged any such tax, assessment, charge or claim whose
amount, applicability or validity is being contested in good faith by
appropriate proceedings.

<PAGE>

                                                                             71

               SECTION 10.08. WAIVER OF CERTAIN COVENANTS. The Company may omit
in any particular instance to comply with any covenant or condition set forth in
Sections 10.05 to 10.07, inclusive, if before the time for such compliance the
Holders of at least a majority in principal amount of the Outstanding Securities
shall, by Act of such Holders, either waive such compliance in such instance or
generally waive compliance with such covenant or condition, but no such waiver
shall extend to or affect such covenant or condition except to the extent so
expressly waived, and, until such waiver shall become effective, the obligations
of the Company and the duties of the Trustee in respect of any such covenant or
condition shall remain in full force and effect.

               SECTION 10.09. DELIVERY OF CERTAIN INFORMATION. At any time when
the Company is not subject to Section 13 or 15(d) of the Exchange Act, upon the
request of a Holder or the holder of shares of Common Stock issued upon
conversion thereof, the Company shall promptly furnish or cause to be furnished
Rule 144A Information (as defined below) to such Holder or such holder of shares
of Common Stock issued upon conversion of Securities, or to a prospective
purchaser of any such security designated by any such Holder or holder, as the
case may be, to the extent required to permit compliance by such Holder or
holder with Rule 144A under the Securities Act in connection with the resale of
any such security. "Rule 144A Information" shall be such information as is
specified pursuant to Rule 144A(d)(4) under the Securities Act.

               SECTION 10.10. RESALE OF CERTAIN SECURITIES; REPORTING ISSUER.
During the period beginning on the last date of original issuance of the
Securities and ending on the date that is two years from such date, the Company
will not, and will use its best efforts not to permit any of its "affiliates"
(as defined under Rule 144 under the Securities Act or any successor provision
thereto) to, resell (x) any Securities which constitute "restricted securities"
under Rule 144 or (y) any securities into which the Securities have been
converted under this Indenture which constitute "restricted securities" under
Rule 144, that in either case have been reacquired by any of them. The Trustee
shall have no responsibility in respect of the Company's performance of its
agreement in the preceding sentence.

               SECTION 10.11. REGISTRATION RIGHTS. (a) The Company agrees that
the Holders (and any Person that has a beneficial interest in a Security) from
time to time of Transfer Restricted Securities are entitled to the benefits of a
Registration Rights Agreement, dated as of February 14, 2000 (the "Registration
Rights Agreement"), executed by the Company. Pursuant to the Registration Rights
Agreement, the Company has agreed for the benefit of the Holders from time to
time of Transfer Restricted Securities, at the Company's expense, (i) to file
within 90 days after the first date of original issuance of the Securities, a
shelf registration statement (the "Shelf Registration Statement") with the
Commission with respect to resales of the Transfer Restricted Securities, (ii)
to use its commercially reasonable best efforts to cause such Shelf

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                                                                            72

Registration Statement to be declared effective by the Commission not later
than 150 days after the first date of original issuance of the Securities,
and (iii) to use its commercially reasonable best efforts to maintain such
Shelf Registration Statement continuously effective under the Securities Act
subject to and in accordance with the terms of the Registration Rights
Agreement.

               Additional interest (the "Additional Interest") with respect to
the Securities shall be assessed as follows if any of the following events occur
(each such event in clauses (i) through (iii) below being herein called a
"Registration Default"):

               (i) if on or prior to the 90th day after the first date of
        original issuance of the Securities the Shelf Registration Statement has
        not been filed with the Commission;

               (ii) if on or prior to the 150th day after the first date of
        original issuance of the Securities the Shelf Registration Statement has
        not been declared effective by the Commission; or

               (iii) if after the Shelf Registration Statement is declared
        effective (A) the Shelf Registration Statement thereafter ceases to be
        effective; or (B) the Shelf Registration Statement or the related
        prospectus ceases to be usable subject to certain exceptions set forth
        in the Registration Rights Agreement, including the right to suspend the
        use of the Shelf Registration Statement under certain circumstances for
        up to 90 days) in connection with resales of Transfer Restricted
        Securities in accordance with and during the periods specified herein
        because either (1) any event occurs as a result of which the related
        prospectus forming part of such Shelf Registration Statement would
        include any untrue statement of a material fact or omit to state any
        material fact necessary to make the statements therein in the light of
        the circumstances under which they were made not misleading, or (2) it
        shall be necessary to amend such Shelf Registration Statement or
        supplement the related prospectus, to comply with the Securities Act or
        the Exchange Act or the respective rules thereunder.

               Additional Interest shall accrue on the Securities over and above
the interest set forth in the title of the Securities from and including the
date on which any such Registration Default shall occur, to but excluding the
date on which all such Registration Defaults have been cured, at a rate of 0.50%
per annum. Written notice of any such Registration Default shall be provided to
the Trustee by the Company.

               (b) Any amounts of Additional Interest due pursuant to clause
(a)(i), (a)(ii) or (a)(iii) of this Section 10.11 shall be payable in cash on
the regular Interest Payment Dates in the manner provided for by the Indenture.
The amount of Additional

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                                                                            73

Interest shall be determined by multiplying the applicable Additional
Interest rate by the principal amount of the Securities, multiplied by a
fraction, the numerator of which is the number of days such Additional
Interest rate was applicable during such period (determined on the basis of a
360-day year comprised of twelve 30-day months), and the denominator of which
is 360.

               Whenever in this Indenture there is mentioned, in any context,
the payment of the principal of, premium, if any, or interest on, or in
respect of, any Security, such mention shall be deemed to include mention of
the payment of Additional Interest provided for in this Section to the extent
that, in such context, Additional Interest are, were or would be payable in
respect thereof pursuant to the provisions of this Section 10.11 and express
mention of the payment of Additional Interest (if applicable) in any
provisions hereof shall not be construed as excluding Additional Interest in
those provisions hereof where such express mention is not made.

                                   ARTICLE XI

                            REDEMPTION OF SECURITIES

               SECTION 11.01. RIGHT OF REDEMPTION. (a) The Securities may be
redeemed at the election of the Company (an "Optional Redemption"), as a whole
or from time to time in part, at any time on or after February 20, 2003, at the
Redemption Prices specified in the form of Security hereinbefore set forth,
together with accrued interest to the Redemption Date.

               (b) In addition to the right to redeem the Securities as provided
in Section 11.01(a), the Company may redeem the Securities (a "Provisional
Redemption"), in whole or in part, at any time prior to February 20, 2003, upon
notice as set forth in Section 11.05, at a redemption price equal to $1,000 per
Security to be redeemed plus accrued and unpaid interest, if any (including
Additional Interest, if any), to the date of redemption (the "Provisional
Redemption Date") if (i) the closing price of the Common Stock shall have
exceeded 150% of the conversion price then in effect for at least 20 Trading
Days in any consecutive 30-Trading Day period ending on the Trading Day prior to
the date of mailing of the notice of redemption pursuant to Section 11.05 (the
"Redemption Notice Date") and (ii) the Shelf Registration Statement is effective
and available for use and is expected to remain effective and available for use
for the 30 days immediately following the Provisional Redemption Date. Upon any
such Provisional Redemption, the Company shall make an additional payment in
cash (the "Make-Whole Payment") with respect to the Securities called for
redemption to Holders on the Redemption Notice Date in an amount equal to
$142.50 per $1,000 Security, less the amount of any interest actually paid on
such Security prior to the Redemption Notice

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                                                                            74

Date. The Company shall make the Make-Whole Payment on all Securities called
for Provisional Redemption, including any Securities converted into Common
Stock pursuant to the terms hereof after the Redemption Notice Date and prior
to the Provisional Redemption Date.

               SECTION 11.02. APPLICABILITY OF ARTICLE. Redemption of Securities
at the election of the Company or otherwise, as permitted or required by any
provision of this Indenture, shall be made in accordance with such provision and
this Article XI.

               SECTION 11.03. ELECTION TO REDEEM; NOTICE TO TRUSTEE. The
election of the Company to redeem any Securities pursuant to Section 11.01 shall
be evidenced by a Board Resolution. In case of any redemption at the election of
the Company, the Company shall, at least 45 days prior to the Redemption Date
fixed by the Company (unless a shorter notice shall be satisfactory to the
Trustee), notify the Trustee of such Redemption Date in writing and of the
principal amount of Securities to be redeemed.

               SECTION 11.04. SELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED.
If less than all the Securities are to be redeemed, the particular Securities
to be redeemed shall be selected not less than 30 days or more than 60 days
prior to the Redemption Date by the Trustee, from the Outstanding Securities
not previously called for redemption, by lot or by such method as the Trustee
shall deem fair and appropriate in the circumstances and which may provide
for the selection for redemption of portions (equal to U.S.$1,000 or any
integral multiple thereof) of the principal amount of Securities of a
denomination larger than U.S.$1,000.

               If any Security selected for partial redemption is converted in
part before termination of the conversion right with respect to the portion of
the Security so selected, the converted portion of such Security shall be deemed
(so far as may be) to be the portion selected for redemption. Securities which
have been converted during a selection of Securities to be redeemed shall be
treated by the Trustee as Outstanding for the purpose of such selection.

               The Trustee shall promptly notify the Company and each Security
Registrar in writing of the Securities selected for redemption and, in the case
of any Securities selected for partial redemption, the principal amount thereof
to be redeemed.

               For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Securities redeemed or to be redeemed only in part, to the
portion of the principal amount of such Securities which has been or is to be
redeemed.

<PAGE>

                                                                             75

               SECTION 11.05. NOTICE OF REDEMPTION. Notice of redemption shall
be given by first-class mail, postage prepaid, mailed not less than 30 nor more
than 60 days prior to the Redemption Date, to each Holder of Securities to be
redeemed, at his address appearing in the Security Register.

               All notices of redemption shall describe the Securities,
including CUSIP number, and state:

               (1)  the Redemption Date;

               (2)  the Redemption Price;

               (3) if less than all the Outstanding Securities are to be
        redeemed, the identification (and, in the case of partial redemption of
        any Securities, the principal amounts) of the particular Securities to
        be redeemed;

               (4) whether such redemption is a Provisional Redemption or an
        Optional Redemption;

               (5) that on the Redemption Date the Redemption Price shall become
        due and payable upon each such Security to be redeemed and that interest
        thereon shall cease to accrue on and after said date;

               (6) the conversion price, the date on which the right to convert
        the Securities to be redeemed will terminate and the place or places
        where such Securities may be surrendered for conversion;

               (7) the place or places where such Securities are to be
        surrendered for payment of the Redemption Price; and

               (8) if such a redemption is a Provisional Redemption, the amount
        of the Make-Whole Payment.

               Notice of redemption of Securities to be redeemed at the election
of the Company shall be given by the Company or, at the Company's request, by
the Trustee in the name and at the expense of the Company, and shall be
irrevocable.

               SECTION 11.06. DEPOSIT OF REDEMPTION PRICE. Prior to 11:00 a.m.,
New York City time, on any Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 10.03) an amount of
money sufficient to pay the Redemption Price of, and (except if the Redemption
Date shall be an Interest Payment Date) accrued interest on, all the Securities
which are to be redeemed on that

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                                                                             76

date other than any Securities called for redemption on that date which have
been converted prior to the date of such deposit.

               If any Security called for redemption is converted, any money
deposited with the Trustee or with any Paying Agent or so segregated and held in
trust for the redemption of such Security shall (subject to any right of the
Holder of such Security or any Predecessor Security to receive interest as
provided in the last paragraph of Section 3.07) be paid to the Company as soon
as practicable upon Company Request or, if then held by the Company, shall be
released from such trust.

               SECTION 11.07. SECURITIES PAYABLE ON REDEMPTION DATE. Notice of
redemption having been given as aforesaid, the Securities so to be redeemed
shall, on the Redemption Date, become due and payable at the Redemption Price
therein specified, and, with respect to Securities called for Provisional
Redemption, the Make-Whole Payment, and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest) such Securities shall cease to bear or accrue any interest. Upon
surrender of any such Security for redemption in accordance with said notice,
such Security shall be paid by the Company at the Redemption Price, together
with accrued interest to (but not including) the Redemption Date and, with
respect to Securities called for Provisional Redemption (including Securities
converted into Common Stock pursuant to the terms hereof after the Redemption
Notice Date and prior to the Provisional Redemption Date), the Make-whole
Payment; PROVIDED, HOWEVER, that installments of interest whose Stated Maturity
is on or prior to the Redemption Date shall be payable to the Holders of such
Securities, or one or more Predecessor Securities, registered as such at the
close of business on the relevant Record Dates according to their terms and the
provisions of Section 3.07; and PROVIDED FURTHER that, with respect to a
Provisional Redemption, the holder of any Securities converted into Common Stock
pursuant to the terms of this Indenture after the Redemption Notice Date and
prior to the Provisional Redemption Date shall have the right to the Make-Whole
Payment, if any, with respect to such Securities regardless of the conversion of
such Securities.

               If the Company shall fail to deposit the Redemption Price (and
MakeWhole Payment, if any) with the Trustee and any Security called for
redemption shall not be so paid upon surrender thereof for redemption, the
principal (and premium, if any) shall, until paid, bear and accrue interest from
the Redemption Date at the rate borne by the Security.

               SECTION 11.08. SECURITIES REDEEMED IN PART. Any Security which is
to be redeemed only in part shall be surrendered at an office or agency of the
Company designated for that purpose pursuant to Section 10.02 (with, if the
Company or the Trustee so requires, due endorsement by, or a written instrument
of transfer in form satisfactory to the Company and the Trustee duly executed
by, the Holder thereof or his

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                                                                             77

attorney-in-fact duly authorized in writing), and the Company shall execute,
and the Trustee shall authenticate and deliver to the Holder of such Security
without service charge, a new Security or Securities, of any authorized
denomination as requested by such Holder, in aggregate principal amount equal
to and in exchange for the unredeemed portion of the principal amount of the
Security so surrendered.

               SECTION 11.09. CONVERSION ARRANGEMENT ON CALL FOR REDEMPTION. In
connection with any redemption of Securities, the Company may arrange for the
purchase and conversion of any Securities by an agreement with one or more
investment bankers or other purchasers to purchase such Securities by paying to
the Trustee in trust for the Holders, on or before the Redemption Date, an
amount not less than the applicable Redemption Price, together with interest
accrued to the Redemption Date, of such Securities and in connection with a
Provisional Redemption, the Make-Whole Payment. Notwithstanding anything to the
contrary contained in this Article XI, the obligation of the Company to pay the
Redemption Price of such Securities, together with interest accrued to, but
excluding, the Redemption Date and in connection with a Provisional Redemption,
the Make-Whole Payment, shall be deemed to be satisfied and discharged to the
extent such amount is so paid by such purchasers. If such an agreement is
entered into, a copy of which shall be filed with the Trustee prior to the
Redemption Date, any Securities not duly surrendered for conversion by the
holders thereof may, at the option of the Company, be deemed, to the fullest
extent permitted by law, acquired by such purchasers from such holders and
(notwithstanding anything to the contrary contained in Article XIII) surrendered
by such purchasers for conversion, all as of immediately prior to the close of
business on the Redemption Date (and the right to convert any such Securities
shall be deemed to have been extended through such time), subject to payment of
the above amount as aforesaid (including the Make-Whole Payment, if any, with
respect to all Securities called for Provisional Redemption). At the written
direction of the Company, the Trustee shall hold and dispose of any such amount
paid to it in the same manner as it would monies deposited with it by the
Company for the redemption of Securities. Without the Trustee's prior written
consent, no arrangement between the Company and such purchasers for the purchase
and conversion of any Securities shall increase or otherwise affect any of the
powers, duties, responsibilities or obligations of the Trustee as set forth in
this Indenture, and the Company agrees to indemnify the Trustee from, and hold
it harmless against, any loss, liability or expense arising out of or in
connection with any such arrangement for the purchase and conversion of any
Securities between the Company and such purchasers to which the Trustee has not
consented in writing, including the costs and expenses incurred by the Trustee
in the defense of any claim or liability arising out of or in connection with
the exercise or performance of any of its powers, duties, responsibilities or
obligations under this Indenture. Nothing in the preceding sentence shall be
deemed to limit the rights and protections afforded to the Trustee in Article VI
hereof, including, but not limited to, the right to indemnification pursuant to
Section 6.07.

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                                                                             78

                                   ARTICLE XII

                           SUBORDINATION OF SECURITIES

               SECTION 12.01. SECURITIES SUBORDINATE TO SENIOR INDEBTEDNESS. The
Company covenants and agrees, and each Holder of a Security, by his acceptance
thereof, likewise covenants and agrees, that, to the extent and in the manner
hereinafter set forth in this Article XII, the indebtedness represented by the
Securities and the payment of the principal of (and premium, if any) and
interest on each and all of the Securities and all obligations of the Company
under this Indenture are hereby expressly made subordinate and subject in right
of payment to the prior payment in full of all Senior Indebtedness.

               SECTION 12.02. PAYMENT OVER OF PROCEEDS UPON DISSOLUTION, ETC. In
the event of (a) any insolvency or bankruptcy case or proceeding, or any
receivership, liquidation, reorganization or other similar case or proceeding in
connection therewith, relative to the Company or to its creditors, as such, or
to its assets, or (b) any liquidation, dissolution or other winding-up of the
Company, whether voluntary or involuntary and whether or not involving
insolvency or bankruptcy, or (c) any assignment for the benefit of creditors or
any other marshaling of assets and liabilities of the Company, then and in any
such event the holders of Senior Indebtedness shall be entitled to receive
payment in full of all amounts due or to become due on or in respect of all
Senior Indebtedness, or provision shall be made for such payment in cash or cash
equivalents or otherwise in a manner satisfactory to the holders of Senior
Indebtedness, before the Holders of the Securities are entitled to receive any
payment on account of principal of (or premium, if any) or interest on the
Securities, and to that end the holders of Senior Indebtedness shall be entitled
to receive, for application to the payment thereof, any payment or distribution
of any kind or character, whether in cash, property or securities, which may be
payable or deliverable in respect of the Securities in any such case,
proceeding, dissolution, liquidation or other winding-up or event.

               In the event that, notwithstanding the foregoing provisions of
this Section 12.02, the Trustee or the Holder of any Security shall have
received any payment or distribution of assets of the Company prohibited by the
foregoing paragraph of any kind or character, whether in cash, property or
securities, before all Senior Indebtedness is paid in full or payment thereof
provided for, and if such fact shall, at or prior to the time of such payment or
distribution, have been made actually known to a Responsible Officer of the
Trustee or, as the case may be, such Holder, then and in such event such payment
or distribution shall be paid over or delivered forthwith to the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee, agent or other
Person making payment or distribution of assets of the Company for application
to the payment of all Senior Indebtedness remaining unpaid, to the extent
necessary to pay all Senior

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                                                                             79

Indebtedness in full, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Indebtedness.

               For purposes of this Article XII only, the words "cash, property
or securities" shall not be deemed to include shares of capital stock of the
Company as reorganized or readjusted, or securities of the Company or any
other corporation provided for by a plan of reorganization or readjustment
which in either case are subordinated in right of payment to all Senior
Indebtedness which may at the time be outstanding to substantially the same
extent as, or to a greater extent than, the Securities are so subordinated as
provided in this Article XII. The consolidation of the Company with, or the
merger of the Company into, another Person or the liquidation or dissolution
of the Company following the conveyance or transfer of its properties and
assets substantially as an entirety to another Person upon the terms and
conditions set forth in Article VIII shall not be deemed a dissolution,
winding-up, liquidation, reorganization, assignment for the benefit of
creditors or marshaling of assets and liabilities of the Company for the
purposes of this Section 12.02 if the Person formed by such consolidation or
into which the Company is merged or which acquires by conveyance or transfer
such properties and assets substantially as an entirety, as the case may be,
shall, as a part of such consolidation, merger, conveyance or transfer,
comply with the conditions set forth in Article VIII.

               SECTION 12.03. NO PAYMENT WHEN SENIOR INDEBTEDNESS IN DEFAULT.
(a) In the event and during the continuation of any default in the payment of
principal of (or premium, if any) or interest on any Senior Indebtedness beyond
any applicable grace period with respect thereto (unless and until such payment
default shall have been cured or waived in writing by the holders of such Senior
Indebtedness), or (b) in the event any judicial proceeding shall be pending with
respect to any such default, then no payment shall be made by the Company on
account of principal of (or premium, if any) or interest on the Securities or on
account of the purchase or other acquisition of Securities (including pursuant
to Articles XI and XIII).

               In the event that, notwithstanding the foregoing, the Company
shall make any payment to the Trustee or the Holder of any Security prohibited
by the foregoing provisions of this Section 12.03, and if such fact shall, at or
prior to the time of such payment, have been made actually known to a
Responsible Officer of the Trustee or, as the case may be, such Holder, then and
in such event such payment shall be paid over and delivered forthwith to the
Company upon Company Request.

               The provisions of this Section 12.03 shall not apply to any
payment with respect to which Section 12.02 would be applicable.

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                                                                             80

               SECTION 12.04. PAYMENT PERMITTED IF NO DEFAULT. Nothing contained
in this Article XII or elsewhere in this Indenture or in any of the Securities
shall prevent (a) the Company, at any time except during the pendency of any
case, proceeding, dissolution, liquidation or other winding-up, assignment for
the benefit of creditors or other marshaling of assets and liabilities of the
Company referred to in Section 12.02 or under the conditions described in
Section 12.03, from making payments at any time of principal of (and premium, if
any) or interest on the Securities, or (b) the application by the Trustee of any
money deposited with it hereunder to the payment of or on account of the
principal of (and premium, if any) or interest on the Securities or the
retention of such payment by the Holders, if, at the time of such application by
the Trustee, a Responsible Officer of the Trustee did not have actual knowledge
that such payment would have been prohibited by the provisions of this Article
XII.

               SECTION 12.05. SUBROGATION TO RIGHTS OF HOLDERS OF SENIOR
INDEBTEDNESS. Subject to the payment in full of all Senior Indebtedness, and
until the Securities are paid in full, the Holders of the Securities shall be
subrogated (equally and ratably with the holders of all indebtedness of the
Company which by its express terms is subordinated to indebtedness of the
Company to substantially the same extent as the Securities are subordinated
and is entitled to like rights of subrogation) to the rights of the holders
of such Senior Indebtedness to receive payments and distributions of cash,
property and securities applicable to the Senior Indebtedness to the extent
that payments and distributions otherwise payable to Holders of Securities
have been applied to the payment of Senior Indebtedness as provided by this
Article XII. For purposes of such subrogation, no payments or distributions
to the holders of the Senior Indebtedness of any cash, property or securities
to which the Holders of the Securities or the Trustee would be entitled,
except for the provisions of this Article XII, and no payments over pursuant
to the provisions of this Article XII to the holders of Senior Indebtedness
by Holders of the Securities or the Trustee, shall, as among the Company, its
creditors other than holders of Senior Indebtedness and the Holders of the
Securities, be deemed to be a payment or distribution by the Company to or on
account of the Senior Indebtedness.

<PAGE>

                                                                             81

               SECTION 12.06. PROVISIONS SOLELY TO DEFINE RELATIVE RIGHTS. The
provisions of this Article XII are and are intended solely for the purpose of
defining the relative rights of the Holders of the Securities on the one hand
and the holders of Senior Indebtedness on the other hand. Nothing contained in
this Article XII or elsewhere in this Indenture or in the Securities is intended
to or shall

               (a) impair, as among the Company, its creditors other than
        holders of Senior Indebtedness and the Holders of the Securities, the
        obligation of the Company, which is absolute and unconditional (and
        which, subject to the rights under this Article XII of the holders of
        Senior Indebtedness, is intended to rank equally with all other general
        obligations of the Company), to pay to the Holders of the Securities the
        principal of (and premium, if any) and interest on the Securities as and
        when the same shall become due and payable in accordance with their
        terms; or

               (b) affect the relative rights against the Company of the Holders
        of the Securities and creditors of the Company other than the holders of
        Senior Indebtedness; or

               (c) prevent the Trustee or the Holder of any Security from
        exercising all remedies otherwise permitted by applicable law upon
        default under this Indenture, subject to the rights, if any, under this
        Article XII of the holders of Senior Indebtedness to receive cash,
        property and securities otherwise payable or deliverable to the Trustee
        or such Holder.

               SECTION 12.07. TRUSTEE TO EFFECTUATE SUBORDINATION. Each Holder
of a Security by his acceptance thereof authorizes and directs the Trustee on
his behalf to take such action as may be necessary or appropriate to effectuate
the subordination provided in this Article XII and appoints the Trustee his
attorney-in-fact for any and all such purposes.

               SECTION 12.08. NO WAIVER OF SUBORDINATION PROVISIONS. No right of
any present or future holder of any Senior Indebtedness to enforce subordination
as herein provided shall at any time in any way be prejudiced or impaired by any
act or failure to act on the part of the Company or by any act or failure to
act, in good faith, by any such holder, or by any non-compliance by the Company
with the terms, provisions and covenants of this Indenture, regardless of any
knowledge thereof any such holder may have or be otherwise charged with.

<PAGE>

                                                                             82

               Without in any way limiting the generality of the foregoing
paragraph, the holders of Senior Indebtedness may, at any time and from time to
time, without the consent of or notice to the Trustee or the Holders of the
Securities, without incurring responsibility to the Holders of the Securities
and without impairing or releasing the subordination provided in this Article
XII or the obligations hereunder of the Holders of the Securities to the holders
of Senior Indebtedness, do any one or more of the following:

               (i) change the manner, place or terms of payment or extend the
        time of payment of, or renew or alter, Senior Indebtedness, or otherwise
        amend or supplement in any manner Senior Indebtedness or any instrument
        evidencing the same or any agreement under which Senior Indebtedness is
        outstanding;

               (ii) sell, exchange, release or otherwise deal with any property
        pledged, mortgaged or otherwise securing Senior Indebtedness;

               (iii) release any Person liable in any manner for the collection
        of Senior Indebtedness;

               (iv) exercise or refrain from exercising any rights against the
        Company and any other Person;

               (v) apply any and all sums received from time to time to the
        Senior Indebtedness.

               SECTION 12.09. NOTICE TO TRUSTEE. The Company shall give prompt
written notice to the Trustee of any fact known to the Company which would
prohibit the making of any payment to or by the Trustee in respect of the
Securities. Notwithstanding the provisions of this Article XII or any other
provision of this Indenture, the Trustee shall not be charged with knowledge of
the existence of any facts which would prohibit the making of any payment to or
by the Trustee in respect of the Securities, unless and until the Trustee shall
have received written notice thereof from the Company or a holder of Senior
Indebtedness or from any trustee therefor; and, prior to the receipt of any such
written notice, the Trustee, subject to the provisions of Section 6.01, shall be
entitled in all respects to assume that no such facts exist; PROVIDED, HOWEVER,
that if the Trustee shall not have received the notice provided for in this
Section 12.09 at least two Business Days prior to the date upon which by the
terms hereof any money may become payable for any purpose (including, without
limitation, the payment of the principal of (and premium, if any) or interest on
any Security), then, anything herein contained to the contrary notwithstanding,
the Trustee shall have full power and authority to receive such money and to
apply the same to the purpose for which such money was received and shall not be
affected by any notice to the contrary which may be received by it within two
Business Days prior to such date.

<PAGE>

                                                                             83

               Subject to the provisions of Section 6.01, the Trustee shall
be entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Indebtedness (or a trustee
therefor) to establish that such notice has been given by a holder of Senior
Indebtedness (or a trustee therefor). In the event that the Trustee
determines in good faith that further evidence is required with respect to
the right of any Person as a holder of Senior Indebtedness to participate in
any payment or distribution pursuant to this Article XII, the Trustee may
request such Person to furnish evidence to the reasonable satisfaction of the
Trustee as to the amount of Senior Indebtedness held by such Person, the
extent to which such Person is entitled to participate in such payment or
distribution and any other facts pertinent to the rights of such Person under
this Article XII, and if such evidence is not furnished, the Trustee may
defer any payment to such Person pending judicial determination as to the
right of such Person to receive such payment.

               SECTION 12.10. RELIANCE ON JUDICIAL ORDER OR CERTIFICATE OF
LIQUIDATING AGENT. Upon any payment or distribution of assets of the Company
referred to in this Article XII, the Trustee, subject to the provisions of
Section 6.01, and the Holders of the Securities shall be entitled to rely upon
any order or decree entered by any court of competent jurisdiction in which such
insolvency, bankruptcy, receivership, liquidation, reorganization, dissolution,
winding up or similar case or proceeding is pending, or a certificate of the
trustee in bankruptcy, receiver, liquidating trustee, custodian, assignee for
the benefit of creditors, agent or other Person making such payment or
distribution, delivered to the Trustee or to the Holders of Securities, for the
purpose of ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this Article
XII.

               SECTION 12.11. TRUSTEE NOT FIDUCIARY FOR HOLDERS OF SENIOR
INDEBTEDNESS. The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Indebtedness and shall not be liable to any such holders if it
shall in good faith mistakenly pay over or distribute to Holders of Securities
or to the Company or to any other Person cash, property or securities to which
any holders of Senior Indebtedness shall be entitled by virtue of this Article
XII or otherwise.

               SECTION 12.12. RIGHTS OF TRUSTEE AS HOLDER OF SENIOR
INDEBTEDNESS; PRESERVATION OF TRUSTEE'S RIGHTS. The Trustee in its individual
capacity shall be entitled to all the rights set forth in this Article XII with
respect to any Senior Indebtedness which may at any time be held by it, to the
same extent as any other holder of Senior Indebtedness, and nothing in this
Indenture shall deprive the Trustee of any of its rights as such holder.

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                                                                             84

               Nothing in this Article XII shall apply to claims of, or payments
to, the Trustee under or pursuant to Section 6.07.

               SECTION 12.13. ARTICLE APPLICABLE TO PAYING AGENTS. In case at
any time any Paying Agent other than the Trustee shall have been appointed by
the Company and be then acting hereunder, the term "Trustee" as used in this
Article XII shall in such case (unless the context otherwise requires) be
construed as extending to and including such Paying Agent within its meaning as
fully for all intents and purposes as if such Paying Agent were named in this
Article XII in addition to or in place of the Trustee; PROVIDED, HOWEVER, that
Section 12.12 shall not apply to the Company or any Affiliate of the Company if
it or such Affiliate acts as Paying Agent.

               SECTION 12.14. CERTAIN CONVERSIONS DEEMED PAYMENT. For the
purposes of this Article XII only, (1) the issuance and delivery of junior
securities upon conversion of Securities in accordance with Article XIII
shall not be deemed to constitute a payment or distribution on account of the
principal of or premium or interest on Securities or on account of the
purchase or other acquisition of Securities, and (2) the payment, issuance or
delivery of cash, property or securities (other than junior securities) upon
conversion of a Security shall be deemed to constitute payment on account of
the principal of such Security. For the purposes of this Section 12.14, the
term "junior securities" means (a) shares of any stock of any class of the
Company and (b) securities of the Company which are subordinated in right of
payment to the prior payment in full of all Senior Indebtedness which may be
outstanding at the time of issuance or delivery of such securities to
substantially the same extent as, or to a greater extent than, the Securities
are so subordinated as provided in this Article XII. Nothing contained in
this Article XII or elsewhere in this Indenture or in the Securities is
intended to or shall impair, as among the Company, its creditors other than
holders of Senior Indebtedness and the Holders of the Securities, the right,
which is absolute and unconditional, of the Holder of any Security to convert
such Security in accordance with Article XIII.

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                                                                             85

                                  ARTICLE XIII

                            CONVERSION OF SECURITIES

               SECTION 13.01. CONVERSION PRIVILEGE AND CONVERSION PRICE. Subject
to and upon compliance with the provisions of this Article XIII, at the option
of the Holder thereof, any Security or any portion of the principal amount
thereof which is U.S.$1,000 or an integral multiple of U.S.$1,000 may be
converted at the principal amount thereof, or of such portion thereof, into
fully paid and nonassessable shares of Common Stock of the Company at any time
following the latest date of original issuance of Securities at the conversion
price, determined as hereinafter provided, in effect at the time of conversion.
Such conversion right shall expire at the close of business on the Business Day
immediately preceding February 15, 2007, subject, in the case of conversion of
any Global Security, to any Applicable Procedures. In case a Security or portion
thereof is called for redemption at the election of the Company or the Holder
thereof exercised his right to require the Company to purchase the Security,
such conversion right in respect of the Security or portion so called shall
expire at the close of business, New York or time, on the Business Day
immediately preceding the corresponding Redemption Date or Purchase Date, as the
case may be, unless the Company defaults in making the payment due upon
redemption or purchase, as the case may be (in each case subject as aforesaid to
any Applicable Procedures with respect to any Global Security).

               The price at which shares of Common Stock shall be delivered upon
conversion (herein called the "conversion price") shall be initially U.S.$321.00
per share of Common Stock. The conversion price shall be adjusted in certain
instances as provided in Section 13.04.

               In case the Company shall, by dividend or otherwise, declare
or make a distribution on its Common Stock referred to in paragraph (4) or
(5) of Section 13.04, the Holder of each Security, upon the conversion
thereof pursuant to this Article XIII subsequent to the close of business on
the date fixed for the determination of shareholders entitled to receive such
distribution and prior to the effectiveness of the conversion price
adjustment in respect of such distribution pursuant to paragraph (4) or (5)
of Section 13.04, shall also be entitled to receive for each share of Common
Stock into which such Security is converted, the portion of the evidences of
indebtedness, shares of capital stock, securities, cash and other property so
distributed applicable to one share of Common Stock; PROVIDED, HOWEVER, that,
at the election of the Company (whose election shall be evidenced by a Board
Resolution) with respect to all Holders so converting, the Company may, in
lieu of distributing to such Holder any portion of such distribution not
consisting of cash or securities of the Company, pay such Holder an amount in
cash equal to the fair market value thereof (as determined in good faith by
the Board of Directors, whose determination shall be conclusive and described
in a Board Resolution). If any

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                                                                             86

conversion of a Security described in the immediately preceding sentence
occurs prior to the payment date for a distribution to holders of Common
Stock which the Holder of the Security so converted is entitled to receive in
accordance with the immediately preceding sentence, the Company may elect
(such election to be evidenced by a Board Resolution) to distribute to such
Holder a due bill for the evidences of indebtedness, shares of capital stock,
securities, cash or assets to which such Holder is so entitled; PROVIDED that
such due bill (i) meets any applicable requirements of the principal national
securities exchange or other market on which the Common Stock is then traded
and (ii) requires payment or delivery of such evidences of indebtedness,
shares of capital stock, securities, cash or assets no later than the date of
payment or delivery thereof to holders of Common Stock receiving such
distribution.

               SECTION 13.02. EXERCISE OF CONVERSION PRIVILEGE. In order to
exercise the conversion privilege, the Holder of any Security to be converted
shall surrender such Security, duly endorsed or assigned to the Company or in
blank, at any office or agency maintained by the Company pursuant to Section
10.02, accompanied by (a) written notice (as set forth in Section 2.05 herein)
to the Company at such office or agency that the Holder elects to convert such
Security or, if less than the entire principal amount thereof is to be
converted, the portion thereof to be converted and (b) if shares or any portion
of such Security not to be converted are to be issued in the name of a Person
other than the Holder thereof, and the restrictions on transfer of such
Security, set forth in the first paragraph of Section 2.02 remain in effect, a
certification of the Holder as to compliance with such restrictions (as set
forth in Section 2.07).

               If the restrictions on transfer of a Security set forth in the
first paragraph of Section 2.02 remain in effect, all shares of Common Stock
delivered upon conversion thereof shall bear a restrictive legend substantially
in the form of such paragraph.

               Except as described in the last paragraph of Section 3.07, no
Holder of Securities will be entitled upon conversion thereof to any payment or
adjustment on account of accrued and unpaid interest thereon or on account of
dividends on the shares of Common Stock issued in connection therewith.
Securities surrendered for conversion during the period from the close of
business on any Regular Record Date to the opening of business on the
corresponding Interest Payment Date (except Securities called for redemption on
a Redemption Date within such period between and including such Regular Record
Date and such Interest Payment Date) must be accompanied by payment to the
Company in New York Clearing House Funds or other funds acceptable to the
Company of an amount equal to the interest payable on such Interest Payment Date
on the principal amount converted.

               Securities shall be deemed to have been converted immediately
prior to the close of business on the day of surrender of such Securities for
conversion in

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                                                                             87

accordance with the foregoing provisions, and at such time the rights of the
Holders of such Securities as Holders shall cease, and the Person or Persons
entitled to receive the Common Stock issuable upon conversion shall be
treated for all purposes as the record holder or holders of such Common Stock
at such time. As promptly as practicable on or after the conversion date, the
Company shall issue and shall deliver at such office or agency a certificate
or certificates for the number of full shares of Common Stock issuable upon
conversion, together with payment in lieu of any fraction of a share as
provided in Section 13.03.

               In the case of any Security which is converted in part only, upon
such conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Security or
Securities of authorized denominations in aggregate principal amount equal to
the unconverted portion of the principal amount of such Security. Any
requirements for notice, surrender or delivery of Securities pursuant to this
Article XIII shall, with respect to any Global Security, be subject to any
Applicable Procedures.

               SECTION 13.03. FRACTIONS OF SHARES. No fractional shares of
Common Stock shall be issued upon conversion of Securities. If more than one
Security shall be surrendered for conversion at one time by the same Holder, the
number of full shares which shall be issuable upon conversion thereof shall be
computed on the basis of the aggregate principal amount of the Securities (or
specified portions thereof) so surrendered. Instead of any fractional share of
Common Stock which would otherwise be issuable upon conversion of any Security
or Securities (or specified portions thereof), the Company shall pay a cash
adjustment in respect of such fraction in an amount equal to the same fraction
of the Closing Price per share of the Common Stock at the close of business on
the day of conversion (or, if such day is not a Trading Day, on the Trading Day
immediately preceding such day) or, alternatively, the Company shall round up to
the next higher whole share.

               SECTION 13.04. ADJUSTMENT OF CONVERSION PRICE. (1) In case the
Company shall pay or make a dividend or other distribution on its Common Stock
exclusively in Common Stock, the conversion price in effect at the opening of
business on the day next following the date fixed for the determination of
shareholders entitled to receive such dividend or other distribution shall be
reduced by multiplying such conversion price by a fraction of which the
numerator shall be the number of shares of Common Stock outstanding at the close
of business on the date fixed for such determination and the denominator shall
be the sum of such number of shares and the total number of shares constituting
such dividend or other distribution, such reduction to become effective
immediately after the opening of business on the day next following the date
fixed for such determination. For the purposes of this paragraph (1), the number
of shares of Common Stock at any time outstanding shall not include shares held
in the

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                                                                             88

treasury of the Company but shall include shares issuable in respect of
scrip certificates issued in lieu of fractions of shares of Common Stock. The
Company shall not pay any dividend or make any distribution on shares of Common
Stock held in the treasury of the Company.

               (2) In case the Company shall pay or make a dividend or other
distribution on its Common Stock consisting exclusively of, or shall
otherwise issue to all holders of its Common Stock, rights, warrants or
options entitling the holders thereof to subscribe for or purchase shares of
Common Stock at a price per share less than the current market price per
share (determined as provided in paragraph (7) of this Section 13.04) of the
Common Stock on the date fixed for the determination of shareholders entitled
to receive such rights, warrants or options, the conversion price in effect
at the opening of business on the day following the date fixed for such
determination shall be reduced by multiplying such conversion price by a
fraction of which the numerator shall be the number of shares of Common Stock
outstanding at the close of business on the date fixed for such determination
plus the number of shares of Common Stock which the aggregate of the offering
price of the total number of shares of Common Stock so offered for
subscription or purchase would purchase at such current market price and the
denominator shall be the number of shares of Common Stock outstanding at the
close of business on the date fixed for such determination plus the number of
shares of Common Stock so offered for subscription or purchase, such
reduction to become effective immediately after the opening of business on
the day following the date fixed for such determination. For the purposes of
this paragraph (2), the number of shares of Common Stock at any time
outstanding shall not include shares held in the treasury of the Company but
shall include shares issuable in respect of scrip certificates issued in lieu
of fractions of shares of Common Stock. The Company shall not issue any
rights, warrants or options in respect of shares of Common Stock held in the
treasury of the Company.

               (3) In case outstanding shares of Common Stock shall be
subdivided into a greater number of shares of Common Stock, the conversion price
in effect at the opening of business on the day following the day upon which
such subdivision becomes effective shall be proportionately reduced, and,
conversely, in case outstanding shares of Common Stock shall each be combined
into a smaller number of shares of Common Stock, the conversion price in effect
at the opening of business on the day following the day upon which such
combination becomes effective shall be proportionately increased, such reduction
or increase, as the case may be, to become effective immediately after the
opening of business on the day following the day upon which such subdivision or
combination becomes effective.

               (4) Subject to the last sentence of this paragraph (4), in case
the Company shall, by dividend or otherwise, distribute to all holders of its
Common Stock evidences

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                                                                             89

of its indebtedness, shares of any class of capital stock, securities, cash
or property (excluding any rights, warrants or options referred to in
paragraph (2) of this Section 13.04, any dividend or distribution paid
exclusively in cash and any dividend or distribution referred to in paragraph
(1) of this Section 13.04), the conversion price shall be reduced so that the
same shall equal the price determined by multiplying the conversion price in
effect immediately prior to the effectiveness of the conversion price
reduction contemplated by this paragraph (4) by a fraction of which the
numerator shall be the current market price per share (determined as provided
in paragraph (7) of this Section 13.04) of the Common Stock on the date of
such effectiveness less the fair market value (as determined in good faith by
the Board of Directors, whose determination shall be conclusive and described
in a Board Resolution and shall, in the case of securities being distributed
for which prior thereto there is an actual or when issued trading market, be
no less than the value determined by reference to the average of the closing
prices in such market over the period specified in the succeeding sentence),
on the date of such effectiveness, of the portion of the evidences of
indebtedness, shares of capital stock, securities, cash and property so
distributed applicable to one share of Common Stock and the denominator shall
be such current market price per share of the Common Stock, such reduction to
become effective immediately prior to the opening of business on the day next
following the later of (a) the date fixed for the payment of such
distribution and (b) the date 20 days after the notice relating to such
distribution is given pursuant to Section 13.06(a) (such later date of (a)
and (b) being referred to as the "Reference Date"). If the Board of Directors
determines the fair market value of any distribution for purposes of this
paragraph (4) by reference to the actual or when issued trading market for
any securities comprising such distribution, it must in doing so consider the
prices in such market over the same period used in computing the current
market price per share pursuant to paragraph (7) of this Section. For
purposes of this paragraph (4), any dividend or distribution that includes
shares of Common Stock or rights, warrants or options to subscribe for or
purchase shares of Common Stock shall be deemed instead to be (a) a dividend
or distribution of the evidences of indebtedness, cash, property, shares of
capital stock or securities other than such shares of Common Stock or such
rights, warrants or options (making any conversion price reduction required
by this paragraph (4)) immediately followed by (b) a dividend or distribution
of such shares of Common Stock or such rights (making any further conversion
price reduction required by paragraph (1) or (2) of this Section 13.04,
except (i) the Reference Date of such dividend or distribution as defined in
this paragraph (4) shall be substituted as "the date fixed for the
determination of shareholders entitled to receive such dividend or other
distributions", "the date fixed for the determination of shareholders
entitled to receive such rights, warrants or options" and "the date fixed for
such determination" within the meaning of paragraphs (1) and (2) of this
Section 13.04 and (ii) any shares of Common Stock included in such dividend
or distribution shall not be deemed "outstanding at the close of business on
the date fixed for such determination" within the meaning of paragraph (1) of
this Section 13.04).

<PAGE>

                                                                             90

               (5) In case the Company shall, by dividend or otherwise, make a
distribution to all holders of its Common Stock exclusively in cash in an
aggregate amount that, together with (i) the aggregate amount of any other
distributions to all holders of its Common Stock made exclusively in cash within
the 12 months preceding the date of payment of such distribution and in respect
of which no conversion price adjustment pursuant to this paragraph (5) has been
made and (ii) the aggregate of any cash plus the fair market value (as
determined in good faith by the Board of Directors, whose determination shall be
conclusive and described in a Board Resolution), as of the expiration of the
tender or exchange offer referred to below, of consideration payable in respect
of any tender or exchange offer by the Company or a Subsidiary for all or any
portion of the Common Stock concluded within the 12 months preceding the date of
payment of such distribution and in respect of which no conversion price
adjustment pursuant to paragraph (6) of this Section 13.04 has been made,
exceeds 12.5% of the product of the current market price per share (determined
as provided in paragraph (7) of this Section 13.04) of the Common Stock on the
date fixed for shareholders entitled to receive such distribution times the
number of shares of Common Stock outstanding on such date, the conversion price
shall be reduced so that the same shall equal the price determined by
multiplying the conversion price in effect immediately prior to the
effectiveness of the conversion price reduction contemplated by this paragraph
(5) by a fraction of which the numerator shall be the current market price per
share (determined as provided in paragraph (7) of this Section 13.04) of the
Common Stock on the date of such effectiveness less the amount of cash so
distributed applicable to one share of Common Stock and the denominator shall be
such current market price per share of the Common Stock, such reduction to
become effective immediately prior to the opening of business on the later of
(a) the day following the date fixed for the payment of such distribution and
(b) the date 20 days after the notice relating to such distribution is given
pursuant to Section 13.06(a).

               (6) In case a successful tender or exchange offer made by the
Company or any Subsidiary for all or any portion of the Common Stock shall
involve an aggregate consideration having a fair market value (as determined
in good faith by the Board of Directors, whose determination shall be
conclusive and described in a Board Resolution) at the last time (the
"Expiration Time") tenders or exchanges may be made pursuant to such tender
or exchange offer (as it may be amended) that, together with (i) the
aggregate of the cash plus the fair market value (as determined in good faith
by the Board of Directors, whose determination shall be conclusive and
described in a Board Resolution), as of the expiration of the other tender or
exchange offer referred to below, of consideration payable in respect of any
other tender or exchange offer by the Company or a Subsidiary for all or any
portion of the Common Stock concluded within the preceding 12 months and in
respect of which no conversion price adjustment pursuant to this paragraph
(6) has been made and (ii) the aggregate amount of any distributions to all

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                                                                             91

holders of the Common Stock made exclusively in cash within the preceding 12
months and in respect of which no conversion price adjustment pursuant to
paragraph (5) of this Section 13.04 has been made, exceeds 12.5% of the
product of the current market price per share (determined as provided in
paragraph (7) of this Section 13.04) of the Common Stock on the Expiration
Time times the number of shares of Common Stock outstanding (including any
tendered shares) on the Expiration Time, the conversion price shall be
reduced (but not increased) so that the same shall equal the price determined
by multiplying the conversion price in effect immediately prior to the
Expiration Time by a fraction of which the numerator shall be (i) the product
of the current market price per share (determined as provided in paragraph
(7) of this Section 13.04) of the Common Stock at the Expiration Time times
the number of shares of Common Stock outstanding (including any tendered or
exchanged shares) at the Expiration Time minus (ii) the fair market value
(determined as aforesaid) of the aggregate consideration payable to
shareholders based on the acceptance (up to any maximum specified in the
terms of the tender or exchange offer) of all shares validly tendered or
exchanged and not withdrawn as of the Expiration Time (the shares deemed so
accepted, up to any such maximum, being referred to as the "Purchased
Shares") and the denominator shall be the product of (i) such current market
price per share at the Expiration Time times (ii) such number of outstanding
shares at the Expiration Time less the number of Purchased Shares, such
reduction to become effective immediately prior to the opening of business on
the day following the Expiration Time.

               (7) For the purpose of any computation under this paragraph
and paragraphs (2), (4) and (5) of this Section 13.04, the current market
price per share of Common Stock on any date in question shall be deemed to be
the average of the daily Closing Prices for the 5 consecutive Trading Days
selected by the Company commencing not more than 20 Trading Days before, and
ending not later than, the date in question; PROVIDED, HOWEVER, that (i) if
the "ex" date (as hereinafter defined) for any event (other than the issuance
or distribution requiring such computation) that requires an adjustment to
the conversion price pursuant to paragraph (1), (2), (3), (4), (5) or (6)
above ("Other Event") occurs on or after the 20th Trading Day prior to the
date in question and prior to the "ex" date for the issuance or distribution
requiring such computation (the "Current Event"), the Closing Price for each
Trading Day prior to the "ex" date for such Other Event shall be adjusted by
multiplying such Closing Price by the same fraction by which the conversion
price is so required to be adjusted as a result of such Other Event, (ii) if
the "ex" date for any Other Event occurs after the "ex" date for the Current
Event and on or prior to the date in question, the Closing Price for each
Trading Day on and after the "ex" date for such Other Event shall be adjusted
by multiplying such Closing Price by the reciprocal of the fraction by which
the conversion price is so required to be adjusted as a result of such Other
Event, (iii) if the "ex" date for any Other Event occurs on the "ex" date for
the Current Event, one of those events shall be deemed for purposes of
clauses (i) and (ii) of this proviso to have an "ex" date occurring prior to
the "ex" date for the other

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                                                                             92

event, and (iv) if the "ex" date for the Current Event is on or prior to the
date in question, after taking into account any adjustment required pursuant
to clause (ii) of this proviso, the Closing Price for each Trading Day on or
after such "ex" date shall be adjusted by adding thereto the amount of any
cash and the fair market value on the date in question (as determined in good
faith by the Board of Directors in a manner consistent with any determination
of such value for purposes of paragraph (4) or (5) of this Section 13.04,
whose determination shall be conclusive and described in a Board Resolution)
of the portion of the rights, warrants, options, evidences of indebtedness,
shares of capital stock, securities, cash or property being distributed
applicable to one share of Common Stock. For the purpose of any computation
under paragraph (6) of this Section 13.04, the current market price per share
of Common Stock on any date in question shall be deemed to be the average of
the daily Closing Prices for the 5 consecutive Trading Days selected by the
Company commencing on or after the latest (the "Commencement Date") of (i)
the date 20 Trading Days before the date in question, (ii) the date of
commencement of the tender or exchange offer requiring such computation and
(iii) the date of the last amendment, if any, of such tender or exchange
offer involving a change in the maximum number of shares for which tenders
are sought or a change in the consideration offered, and ending not later
than the date of the Expiration Time of such tender or exchange offer (or, if
such Expiration Time occurs before the close of trading on a Trading Day, not
later than the Trading Day immediately preceding the date of such Expiration
Time); PROVIDED, HOWEVER, that if the "ex" date for any Other Event (other
than the tender or exchange offer requiring such computation) occurs on or
after the Commencement Date and on or prior to the date of the Expiration
Time for the tender or exchange offer requiring such computation, the Closing
Price for each Trading Day prior to the "ex" date for such Other Event shall
be adjusted by multiplying such Closing Price by the same fraction by which
the conversion price is so required to be adjusted as a result of such other
event. For purposes of this paragraph, the term "ex" date, (i) when used with
respect to any issuance or distribution, means the first date on which the
Common Stock trades regular way on the relevant exchange or in the relevant
market from which the Closing Price was obtained without the right to receive
such issuance or distribution, (ii) when used with respect to any subdivision
or combination of shares of Common Stock, means the first date on which the
Common Stock trades regular way on such exchange or in such market after the
time at which such subdivision or combination becomes effective, and (iii)
when used with respect to any tender or exchange offer means the first date
on which the Common Stock trades regular way on such exchange or in such
market after the Expiration Time of such tender or exchange offer.

               (8) The Company may make such reductions in the conversion price,
in addition to those required by paragraphs (1), (2), (3), (4), (5) and (6) of
this Section, as it considers to be advisable in order that any event treated
for Federal income tax purposes as a dividend of stock or stock rights shall not
be taxable to the recipients, or to diminish the amount of such tax payable.

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                                                                             93

               (9) To the extent permitted by applicable law, the Company may
from time to time decrease the conversion price by any amount for any period
of time so long as (i) such period of time is at least 20 days, (ii) such
decrease is irrevocable during such period and (iii) the Board of Directors
has determined that such a decrease is in the best interests of the Company,
which determination shall be conclusive. No such decrease may be taken into
account when determining whether the Closing Price of the Common Stock
exceeds the conversion price for purposes of clause (i) of the third
paragraph of Section 14.07. Whenever the conversion price is decreased
pursuant to the first sentence of this paragraph (9), the Company shall give
notice of the decrease to the Holders of Securities in the manner provided in
Section 1.06 at least 15 days prior to the date the decreased conversion
price takes effect, and such notice shall state the decreased conversion
price and the period during which it will be in effect.

               (10) No adjustment in the conversion price shall be required
unless such adjustment would require an increase or decrease of at least 1% in
the conversion price; PROVIDED, HOWEVER, that any adjustments which by reason of
this paragraph (10) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment.

               (11) In the event that the Company distributes rights or warrants
(other than those referred to in paragraph (2) above) pro rata to holders of
Common Stock, so long as any such rights or warrants have not expired or been
redeemed by the Company, the Company shall make proper provision so that the
Holder of any Security surrendered for conversion will be entitled to receive
upon such conversion, in addition to the Conversion Shares, a number of rights
and warrants to be determined as follows: (i) if such conversion occurs on or
prior to the date for the distribution to the holders of rights or warrants of
separate certificates evidencing such rights or warrants (the "Distribution
Date"), the same number of rights or warrants to which a holder of a number of
shares of Common Stock equal to the number of Conversion Shares is entitled at
the time of such conversion in accordance with the terms and provisions of and
applicable to the rights or warrants, and (ii) if such conversion occurs after
such Distribution Date, the same number of rights or warrants to which a holder
of the number of shares of Common Stock into which the principal amount of such
Security so converted was convertible immediately prior to such Distribution
Date would have been entitled on such Distribution Date in accordance with the
terms and provisions of and applicable to the rights or warrants.

<PAGE>

                                                                             94

               SECTION 13.05. NOTICE OF ADJUSTMENTS OF CONVERSION PRICE.
Whenever the conversion price is adjusted as herein provided:

               (a) the Company shall compute the adjusted conversion price in
        accordance with Section 13.04 and shall prepare a certificate signed by
        the Treasurer of the Company setting forth the adjusted conversion price
        and showing in reasonable detail the facts upon which such adjustment is
        based, and such certificate shall forthwith be filed (with a copy to the
        Trustee) at each office or agency maintained for the purpose of
        conversion of Securities pursuant to Section 10.02; and

               (b) a notice stating that the conversion price has been adjusted
        and setting forth the adjusted conversion price shall forthwith be
        required, and as soon as practicable after it is required, such notice
        shall be mailed by the Company to all Holders at their last addresses as
        they shall appear in the Security Register.

               SECTION 13.06.  NOTICE OF CERTAIN CORPORATE ACTION.  In case:

               (a) the Company shall declare a dividend (or any other
        distribution) on its Common Stock that would require a conversion price
        adjustment pursuant to paragraph (5) of Section 13.04; or

               (b) the Company shall authorize the granting to all holders of
        its Common Stock of rights, warrants or options to subscribe for or
        purchase any shares of capital stock of any class or of any other rights
        (excluding rights distributed pursuant to any shareholder rights plan);
        or

               (c) of any reclassification of the Common Stock of the Company
        (other than a subdivision or combination of its outstanding shares of
        Common Stock), or of any consolidation or merger to which the Company is
        a party and for which approval of any shareholders of the Company is
        required, or of the sale or transfer of all or substantially all of the
        assets of the Company; or

               (d) of the voluntary or involuntary dissolution, liquidation or
        winding, up of the Company; or

               (e) the Company or any Subsidiary of the Company shall commence a
        tender or exchange offer for all or a portion of the Company's
        outstanding shares of Common Stock (or shall amend any such tender or
        exchange offer);

then the Company shall cause to be filed at each office or agency maintained for
the purpose of conversion of Securities pursuant to Section 10.02, and shall
cause to be mailed to all Holders at their last addresses as they shall appear
in the Security Register,

<PAGE>

                                                                              95

at least 20 days (or 10 days in any case specified in clause (a) or (b) above)
prior to the applicable record, effective or expiration date hereinafter
specified, a notice stating (x) the date on which a record is to be taken for
the purpose of such dividend, distribution or granting of rights, warrants or
options, or, if a record is not to be taken, the date as of which the holders of
Common Stock of record to be entitled to such dividend, distribution, rights,
warrants or options are to be determined, or (y) the date on which such
reclassification, consolidation, merger, sale, transfer, dissolution,
liquidation or winding up is expected to become effective, and the date as of
which it is expected that holders of Common Stock of record shall be entitled to
exchange their shares of Common Stock for securities, cash or other property
deliverable upon such reclassification, consolidation, merger, sale, transfer,
dissolution, liquidation or winding up, or (z) the date on which such tender
offer commenced, the date on which such tender offer is scheduled to expire
unless extended, the consideration offered and the other material terms thereof
(or the material terms of any amendment thereto).

               SECTION 13.07. COMPANY TO RESERVE COMMON STOCK. The Company shall
at all times reserve and keep available, free from preemptive rights, out of its
authorized but unissued Common Stock, solely for the purpose of effecting the
conversion of Securities, the whole number of shares of Common Stock then
issuable upon the conversion in full of all outstanding Securities.

               SECTION 13.08. TAXES ON CONVERSIONS. The Company will pay any and
all taxes that may be payable in respect of the issue or delivery of shares of
Common Stock on conversion of Securities pursuant hereto. The Company shall not,
however, be required to pay any tax which may be payable in respect of any
transfer involved in the issue and delivery of shares of Common Stock in a name
other than that of the Holder of the Security or Securities to be converted, and
no such issue or delivery shall be made unless and until the Person requesting
such issue has paid to the Company the amount of any such tax, or has
established to the satisfaction of the Company that such tax has been paid.

               SECTION 13.09. COVENANT AS TO COMMON STOCK. The Company covenants
that all shares of Common Stock which may be issued upon conversion of
Securities will upon issue be newly issued (and not treasury shares) and be duly
authorized, validly issued, fully paid and nonassessable and, except as provided
in Section 13.08, the Company will pay all taxes, liens and charges with respect
to the issue thereof.

               SECTION 13.10. CANCELLATION OF CONVERTED SECURITIES. All
Securities delivered for conversion shall be delivered to the Trustee to be
cancelled by or at the direction of the Trustee, which shall dispose of the same
as provided in Section 3.09.

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                                                                              96

               SECTION 13.11. PROVISIONS IN CASE OF RECLASSIFICATION,
CONSOLIDATION, MERGER OR SALE OF ASSETS. In the event that the Company shall be
a party to any transaction (including without limitation any (i)
recapitalization or reclassification of the Common Stock (other than a change in
par value, or from par value to no par value, or from no par value to par value,
or as a result of a subdivision or combination of the Common Stock), (ii)
consolidation of the Company with, or merger of the Company into, any other
person. any merger of another person into the Company (other than a merger which
does not result in a reclassification, conversion, exchange or cancellation of
outstanding shares of Common Stock of the Company), (iii) sale or transfer of
all or substantially all of the assets of the Company, or (iv) other
transaction) pursuant to which the Common Stock is converted into the right to
receive other securities, cash or other property, then lawful provision shall be
made as part of the terms of such transaction whereby the Holder of each
Security then outstanding shall have the right thereafter to convert such
Security only into (subject to funds being legally available for such purpose
under applicable law at the time of such conversion) the kind and amount of
securities, cash and other property receivable upon such transaction by a holder
of the number of shares of Common Stock into which such Security might have been
converted immediately prior to such transaction. The Company or the person
formed by such consolidation or resulting from such merger or which acquired
such assets or which acquired the Company's shares, as the case may be, shall
execute and deliver to the Trustee a supplemental indenture establishing such
rights. Such supplemental indenture shall provide for adjustments which, for
events subsequent to the effective date of such supplemental indenture, shall be
as nearly equivalent as may be practicable to the adjustments provided for in
this Article. The above provisions of this Section 13.11 shall similarly apply
to successive transactions of the foregoing type.

               SECTION 13.12. TRUSTEE ADJUSTMENT DISCLAIMER. The Trustee has no
duty to determine when an adjustment under this Article XIII should be made, how
it should be made or what it should be. The Trustee has no duty to determine
whether a supplemental indenture need be entered into or whether any provisions
of any supplemental indenture are correct. The Trustee shall not be accountable
for and makes no representation as to the validity or value of any securities or
assets issued upon conversion of Securities. The Trustee shall not be
responsible for the Company's failure to comply with this Article XIII.

<PAGE>

                                                                              97

                                   ARTICLE XIV

                            RIGHT TO REQUIRE PURCHASE

               SECTION 14.01. RIGHT TO REQUIRE PURCHASE. In the event that there
shall occur a Change in Control, then each Holder shall have the right, at such
Holder's option, to require the Company, subject to the provisions of Section
12.03, to purchase all or any designated part of such Holder's Securities on the
date (the "Purchase Date") fixed by the Company that is not less than 30 days
nor more than 45 days after the date the Company gives notice of the Change in
Control as contemplated in Section 14.03(a) at a price (the "Purchase Price")
equal to 100% of the principal amount thereof, together with accrued and unpaid
interest through the Purchase Date. Such right to require the purchase of
Securities shall not continue after a discharge of the Company from its
obligations with respect to the Securities in accordance with Article IV. At the
option of the Company, the Purchase Price may be paid in cash or, subject to the
fulfillment by the Company of the conditions set forth Section 14.02 hereof, by
delivery of shares of Common Stock in accordance with Section 14.02. Whenever in
this Indenture (including Sections 2.02, 3.01, 5.01(1) and 5.08) there is a
reference, in any context, to the principal of any Security as of any time, such
reference shall be deemed to include reference to the Purchase Price payable in
respect of such Security to the extent that such Purchase Price is, was or would
be so payable at such time, and express mention of the Purchase Price in any
provision of this Indenture shall not be construed as excluding the Purchase
Price in those provisions of this Indenture when such express mention is not
made. Any requirements for notice, surrender or delivery of Securities pursuant
to this Article XIV shall, with respect to any Global Security, be subject to
any Applicable Procedures.

               SECTION 14.02. CONDITIONS AND PROCEDURES RELATING TO THE
COMPANY'S ELECTION TO PAY THE PURCHASE PRICE IN COMMON STOCK. (a) The Company
may elect to pay the Purchase Price by delivery of shares of Common Stock
pursuant to Section 14.01 so long as the following conditions precedent are
satisfied:

               (i) The shares of Common Stock deliverable in payment of the
Purchase Price shall have a fair market value as of the Purchase Date of not
less than the Purchase Price. For purposes of Section 14.01 and this Section
14.02, the fair market value of shares of Common Stock shall be determined by
the Company and shall be equal to 95% of the average of the Closing Prices of
the Common Stock for the five consecutive Trading Days immediately preceding and
including the third Trading Day prior to the Purchase Date;

               (ii) The shares of Common Stock to be issued upon purchase of
Notes pursuant to this Article XIV (A) shall not require registration under any
federal securities law before such shares may be freely transferable without
being subject to any transfer

<PAGE>

                                                                              98

restrictions under the Securities Act upon purchase pursuant to this Article XIV
or, if such registration is required, such registration shall be completed and
shall become effective prior to the Purchase Date, and (B) shall not require
registration with or approval of any governmental authority under any state law
or any other federal law before such shares may be validly issued or delivered
upon purchase pursuant to this Article XIV or if such registration is required
or such approval must be obtained, such registration shall be completed or such
approval shall be obtained prior to the Purchase Date;

               (iii) The shares of Common Stock to be issued upon purchase of
Notes pursuant to this Article XIV are, or shall have been, approved for listing
on Nasdaq or the New York Stock Exchange or listed on another national
securities exchange, in any case, prior to the Purchase Date; and

               (iv) All shares of Common Stock which may be issued upon purchase
of Notes pursuant to this Article XIV will be issued out of the Company's
authorized but unissued Common Stock and, will upon issue, be duly and validly
issued and fully paid and non-assessable and free of any preemptive or similar
rights.

               If all of the conditions set forth in this Section 14.02(a) are
not satisfied in accordance with the terms hereof, the Purchase Price shall be
paid by the Company only in cash.

               (b) Any issuance of shares of Common Stock in respect of the
Purchase Price shall be deemed to have been effected immediately prior to the
close of business on the Purchase Date and the Person or Persons in whose name
or names any certificate or certificates for shares of Common Stock shall be
issuable upon such purchase shall be deemed to have become on the Purchase Date
the holder or holders of record of the shares represented thereby; PROVIDED,
HOWEVER, that any surrender for purchase on a date when the stock transfer books
of the Company shall be closed shall constitute the Person or Persons in whose
name or names the certificate or certificates for such shares are to be issued
as the record holder or holders thereof for all purposes at the opening of
business on the next succeeding day on which such stock transfer books are open.
No payment or adjustment shall be made for dividends or distributions on any
Common Stock issued upon purchase of any Note pursuant to this Article XIV
declared prior to the Purchase Date.

               (c) No fractions of shares shall be issued upon purchase of Notes
pursuant to this Article XIV. If more than one Note shall be purchased from the
same Holder and the Purchase Price shall be payable in shares of Common Stock,
the number of full shares which shall be issuable upon such purchase shall be
computed on the basis of the aggregate principal amount of the Notes so
purchased. Instead of any fractional share of

<PAGE>

                                                                              99

Common Stock which would otherwise be issuable on the purchase of any Note or
Notes pursuant to this Article XIV, the Company will deliver to the applicable
Holder its check for the current market value of such fractional share. The
current market value of a fraction of a share is determined by multiplying the
Closing Price of a full share on the Trading Day immediately preceding the
Purchase Date by the fraction, and rounding the result to the nearest cent.

               (d) Any issuance and delivery of certificates for shares of
Common Stock on purchase of Notes pursuant to this Article XIV shall be made
without charge to the Holder of Notes being purchased for such certificates or
for any tax or duty in respect of the issuance or delivery of such certificates
or the Notes represented thereby; PROVIDED, HOWEVER, that the Company shall not
be required to pay any tax or duty which may be payable in respect of (i) income
of the Holder or (ii) any transfer involved in the issuance or delivery of
certificates for shares of Common Stock in a name other than that of the Holder
of the Notes being purchased, and no such issuance or delivery shall be made
unless and until the Person requesting such issuance or delivery has paid to the
Company the amount of any such tax or duty or has established, to the
satisfaction of the Company, that such tax or duty has been paid.
               SECTION 14.03. NOTICE, METHOD OF EXERCISING PURCHASE RIGHT. (a)
On or before the 15th day after the Company knows or reasonably should know a
Change in Control has occurred, the Company, or at the written request of the
Company, the Trustee (in the name and at the expense of the Company), shall give
notice of the occurrence of the Change in Control and of the purchase right set
forth herein arising as a result thereof by first-class mail, postage prepaid,
or by telefacsimile with written acknowledgment of transmittal to each Holder of
the Securities at such Holder's address appearing in the Security Register. The
Company shall also deliver a copy of such notice of a purchase right to the
Trustee.

               Each notice of a purchase right shall state:

               (1) the Purchase Date,

               (2) the date by which the purchase right must be exercised,

               (3) the Purchase Price,

               (4) whether the Purchase Price will be paid in the form of cash
        or Common Stock as provided in this Indenture and that such
        determination is irrevocable, and

               (5) the instructions a Holder must follow to exercise its
        purchase right.

<PAGE>

                                                                           100
               No failure of the Company to give the foregoing notice shall
limit any Holder's right to exercise a purchase right. The Trustee shall have no
affirmative obligation to determine if there shall have occurred a Change in
Control.

               (b) To exercise a purchase right, a Holder shall deliver to the
Company (or an agent designated by the Company for such purpose in the notice
referred to in (a) above) and to the Trustee on or before the 30th day after the
date of transmittal of the notice referred to in (a) above (i) written notice of
the Holder's exercise of such right, which notice shall set forth the name of
the Holder, the principal amount of the Security or Securities (or portion of a
Security) to be purchased, and a statement that an election to exercise the
purchase right is being made thereby, and (ii) the Security or Securities with
respect to which the purchase right is being exercised, duly endorsed for
transfer to the Company. Such written notice shall be irrevocable. If the
Purchase Date falls between any Regular Record Date and the corresponding
succeeding Interest Payment Date, Securities to be purchased must be accompanied
by payment from the Holder of an amount equal to the interest thereon which the
registered Holder thereof is to receive on such Interest Payment Date.

               (c) In the event a purchase right shall be exercised in
accordance with the terms hereof, the Company shall on the Purchase Date pay or
cause to be paid in cash or shares of Common Stock, as provided herein, to the
Holder thereof the Purchase Price of the Security or Securities as to which the
purchase right had been exercised.

               SECTION 14.04. DEPOSIT OF PURCHASE PRICE. On or prior to the
Purchase Date, the Company shall deposit with the Trustee or with a Paying
Agent (or, if the Company is acting as its own Paying Agent, segregate and
hold in trust as provided in Section 10.03) cash or shares of Common Stock,
as provided herein, sufficient to pay the Purchase Price of the Securities
which are to be repaid on the Purchase Date.

               SECTION 14.05. SECURITIES NOT PURCHASED ON PURCHASE DATE. If any
Security surrendered for purchase shall not be so paid on the Purchase Date, the
principal of such Security shall, until paid, bear interest from the Purchase
Date at a rate borne by such Security.

               SECTION 14.06. SECURITIES PURCHASED IN PART. Any Security which
is to be purchased only in part shall be surrendered at any office or agency of
the Company designated for that purpose pursuant to Section 10.02 (with, if the
Company or the Trustee so requires, due endorsement by, or written instrument of
transfer in form satisfactory to the Company and the Trustee duly executed by,
the Holder thereof or his attorney duly authorized in writing), and the Company
shall execute, and the Trustee shall authenticate and deliver to the Holder of
such Security without service charge, a new Security or Securities of any
authorized denomination as requested by such Holder,

<PAGE>

                                                                           101
in aggregate principal amount equal to and in exchange for the unpurchased
portion of the principal of the Security so surrendered.

               SECTION 14.07. CERTAIN DEFINITIONS. For purposes of this Article:
The term "Beneficial Owner" shall be determined in accordance with Rules 13d-3
and 13d-5 promulgated by the Commission under the Exchange Act, or any successor
provision thereto, except that a Person shall be deemed to have "beneficial
ownership" of all shares that such Person has the right to acquire, whether such
right is exercisable immediately or only after the passage of time.

               A "Change in Control" shall be deemed to have occurred at such
time as (a) any Person, or any Persons acting together in a manner which
would constitute a "group" (a "Group") for purposes of Section 13(d) of the
Exchange Act, or any successor provision thereto, together with any
Affiliates thereof, (i) become the Beneficial Owners, directly or indirectly,
of capital stock of the Company, entitling such Person or Persons and its or
their Affiliates to exercise more than 50% of the total voting power of all
classes of the Company's capital stock entitled to vote generally in the
election of directors or (ii) shall succeed in having sufficient of its or
their nominees (who are not supported by a majority of the then current Board
of Directors of the Company) elected to the Board of Directors of the Company
such that such nominees, when added to any existing directors remaining on
the Board of Directors of the Company after such election who are Affiliates
of or acting in concert with any such Persons, shall constitute a majority of
the Board of Directors of the Company, (b) the Company shall be a party to
any transaction pursuant to which the Common Stock is converted into the
right to receive other securities (other than common stock), cash and/or
property (or the Company, by dividend, tender or exchange offer or otherwise,
distributes other securities, cash and/or property to holders of Common
Stock) and the value of all such securities, cash and/or property distributed
in such transaction and any other transaction effected within the 12 months
preceding consummation of such transaction (as determined in good faith by
the Board of Directors, whose determination shall be conclusive and described
in a Board Resolution) is more than 50% of the average of the daily Closing
Prices for the five consecutive Trading Days ending on the Trading Day
immediately preceding the date of such transaction (or, if earlier, the
Trading Day immediately preceding the ex date (as defined in paragraph (7) of
Section 13.04) for such transaction) or (c) the Company shall consolidate
with or merge into any other Person or sell, convey, transfer or lease its
properties and assets substantially as an entirety to any Person other than a
Subsidiary, or any other Person shall consolidate with or merge into the
Company (other than, in the case of this clause (c), pursuant to any
consolidation or merger where Persons who are shareholders of the Company
immediately prior thereto become the Beneficial Owners of shares of capital
stock of the surviving company entitling such Persons to exercise more than
50% of the total voting power of all classes of such surviving company's
capital stock entitled to vote generally in the election of directors).

<PAGE>

                                                                           102
               Notwithstanding the foregoing, a "Change in Control" will be
deemed not to have occurred (i) if the Closing Price of the Common Stock for any
five Trading Days during the ten Trading Days immediately preceding the Change
in Control is at least equal to 105% of the conversion price in effect
immediately preceding the Change in Control or (ii) if at least 90% of the
consideration (excluding cash payments for fractional shares or cash payments
for appraisal rights) received or to be received by the shareholders of the
Company in the transaction or transactions constituting the Change in Control
consists of (x) shares of common stock of an entity organized and validly
existing under the laws of the United States of America, any State thereof or
the District of Columbia the common stock of which is, or upon issuance will be,
traded on a national securities exchange in the United States of America or
through Nasdaq or (y) shares of common stock of an entity organized and validly
existing under the laws of a jurisdiction outside of the United States of
America, or American Depositary Shares representing such shares of common stock,
that are, or upon issuance will be, traded on a national securities exchange in
the United States of America or through Nasdaq, if such entity has a worldwide
total market capitalization of its equity securities of at least U.S. $5
billion.

                                   ARTICLE XV

                       DEFEASANCE AND COVENANT DEFEASANCE

               SECTION 15.01. COMPANY'S OPTION TO EFFECT DEFEASANCE OR COVENANT
DEFEASANCE. The Company may at its option by Board Resolution, at any time,
elect to have either Section 15.02 or Section 15.03 applied to the Outstanding
Securities upon compliance with the conditions set forth below in this Article
XV.

               SECTION 15.02. DEFEASANCE AND DISCHARGE. Upon the Company's
exercise of the option provided in Section 15.01 applicable to this Section,
the Company shall be deemed to have been discharged from its obligations with
respect to the Outstanding Securities (other than those specified below), the
Holders and any holders of Senior Indebtedness, and the provisions of Article
XII hereof shall cease to be effective, on the date the conditions set forth
below are satisfied (hereinafter, "defeasance"). For this purpose, such
defeasance means that the Company shall be deemed to have paid and discharged
the entire indebtedness represented by the Outstanding Securities, the
Company shall be deemed to have satisfied all their other obligations under
such Securities and this Indenture insofar as such Securities are concerned
(and the Trustee, at the expense of the Company, shall execute proper
instruments acknowledging the same), except for the following which shall
survive until otherwise terminated or discharged hereunder: (A) the rights of
Holders of such Securities to receive, solely from the trust fund described
in Section 15.04 and as more fully set forth in such Section, payments in

<PAGE>

                                                                           103
respect of the principal of, premium, if any and interest on such Securities
when such payments are due, (B) the Company's obligations with respect to
such Securities under Sections 3.04, 3.05, 3.06, 10.02, 10.03, 10.11, Article
XIII and Article XIV, (C) the rights, powers, trusts, duties and immunities
of the Trustee hereunder and (D) this Article XV. Subject to compliance with
this Article XV, the Company may exercise its option under this Section 15.02
notwithstanding the prior exercise of its option under Section 15.03.

               SECTION 15.03. COVENANT DEFEASANCE. Upon the Company's exercise
of the option provided in Section 15.01 applicable to this Section, (i) the
Company shall be released from its obligations under Section 10.06 and Section
10.07, (ii) the occurrence of an event specified in Section 5.01(4) (with
respect to either of Section 10.06 or Section 10.07) or 5.01(5) shall not be
deemed to be an Event of Default and (iii) the provisions of Article XII hereof
shall cease to be effective on and after the date the conditions set forth below
are satisfied (hereinafter, "covenant defeasance"). For this purpose, such
covenant defeasance means that the Company may omit to comply with and shall
have no liability in respect of any term, condition or limitation set forth in
any such Section or Article, whether directly or indirectly by reason of any
reference elsewhere herein to any such Section or Article or by reason of any
reference in any such Section or Article to any other provision herein or in any
other document, but the remainder of this Indenture and such Securities shall be
unaffected thereby.

               SECTION 15.04. CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE.
The following shall be the conditions to application of either Section 15.02 or
Section 15.03 to the then Outstanding Securities:

<PAGE>

                                                                           104
               (1) The Company shall irrevocably have deposited or caused to be
        deposited with the Trustee (or another trustee satisfying the
        requirements of Section 6.09 who shall agree to comply with the
        provisions of this Article XV applicable to it) as trust funds in trust
        for the purpose of making the following payments, specifically pledged
        as security for, and dedicated solely to, the benefit of the Holders of
        such Securities, (A) money in an amount, or (B) U.S. Government
        Obligations which through the scheduled payment of principal and
        interest in respect thereof in accordance with their terms will provide,
        not later than one day before the due date of any payment, money in an
        amount, or (C) a combination thereof, sufficient, in the written opinion
        of a nationally recognized firm of independent public accountants
        expressed in a written certification thereof delivered to the Trustee,
        to pay and discharge, and which shall be applied by the Trustee (or
        other qualifying trustee) to pay and discharge, the principal of,
        premium, if any, and each installment of interest on the Securities on
        the Stated Maturity of such principal or installment of interest in
        accordance with the terms of this Indenture and of such Securities. For
        this purpose, "U.S. Government Obligations" means securities that are
        (x) direct obligations of the United States of America for the payment
        of which its full faith and credit is pledged or (y) obligations of a
        Person controlled or supervised by and acting as an agency or
        instrumentality of the United States of America the payment of which is
        unconditionally guaranteed as a full faith and credit obligation by the
        United States of America, which, in either case, are not callable or
        redeemable at the option of the issuer thereof, and shall also include a
        depository receipt issued by a bank (as defined in Section 3(a)(2) of
        the Securities Act) as custodian with respect to any such U.S.
        Government Obligation or a specific payment of principal of or interest
        on any such U.S. Government Obligation held by such custodian for the
        account of the holder of such depository receipt; PROVIDED that
        (except as required by law) such custodian is not authorized to make any
        deduction from the amount payable to the holder of such depository
        receipt from any amount received by the custodian in respect of the U.S.
        Government Obligation or the specific payment of principal of or
        interest on the U.S. Government Obligation evidenced by such depository
        receipt.

               (2) In the case of an election under Section 15.02, the Company
        shall have delivered to the Trustee an Opinion of Counsel stating that
        (x) the Company has received from, or there has been published by, the
        Internal Revenue Service a ruling, or (y) since the date of this
        Indenture there has been a change in the applicable Federal income tax
        law, in either case to the effect that, and based thereon such opinion
        shall confirm that, the Holders of the Outstanding Securities will not
        recognize gain or loss for Federal income tax purposes as a result of
        such deposit, defeasance and discharge and will be subject to Federal
        income tax on the
<PAGE>

                                                                            105

        same amount, in the same manner and at the same times
        as would have been the case if such deposit, defeasance and discharge
        had not occurred.

               (3) In the case of an election under Section 15.03, the Company
        shall have delivered to the Trustee an Opinion of Counsel to the effect
        that the Holders of the Outstanding Securities will not recognize gain
        or loss for Federal income tax purposes as a result of such deposit and
        covenant defeasance and will be subject to Federal income tax on the
        same amount, in the same manner and at the same times as would have been
        the case if such deposit and covenant defeasance had not occurred.

               (4) The Company shall have delivered to the Trustee an Officers'
        Certificate to the effect that the Securities, if then listed on any
        securities exchange, will not be delisted as a result of such deposit.

               (5) Such defeasance or covenant defeasance shall not cause the
        Trustee to have a conflicting interest as defined in Section 6.08 and
        for purposes of the Trust Indenture Act with respect to any securities
        of the Company.

               (6) At the time of such deposit: (A) no default in the payment of
        all or a portion of principal of (or premium, if any) or interest on or
        other obligations in respect of any Senior Indebtedness shall have
        occurred and be continuing, and no event of default with respect to any
        Senior Indebtedness shall have occurred and be continuing and shall have
        resulted in such Senior Indebtedness becoming or being declared due and
        payable prior to the date on which it would otherwise have become due
        and payable and (B) no other event with respect to any Senior
        Indebtedness shall have occurred and be continuing permitting (after
        notice or the lapse of time, or both) the holders of such Senior
        Indebtedness (or a trustee on behalf of the holders thereof) to declare
        such Senior Indebtedness due and payable prior to the date on which it
        would otherwise have become due and payable, or, in the case of either
        clause (A) or clause (B) above, each such default or event of default
        shall have been cured or waived or shall have ceased to exist.

               (7) No Event of Default or event which with notice or lapse of
        time or both would become an Event of Default shall have occurred and be
        continuing on the date of such deposit or, insofar as subsections
        5.01(6) and (7) are concerned, at any time during the period ending on
        the 121st day after the date of such deposit
        (it being understood that this condition shall not be deemed satisfied
        until the expiration of such period).

<PAGE>

                                                                            106

               (8) Such defeasance or covenant defeasance shall not result in a
        breach or violation of, or constitute a default under, any other
        agreement or instrument to which the Company is a party or by which it
        is bound.

               (9) The Company shall have delivered to the Trustee an Officers'
        Certificate and an Opinion of Counsel, each stating that all conditions
        precedent provided for relating to either the defeasance under Section
        15.02 or the covenant defeasance under Section 15.03 and Section 15.04
        (as the case may be) have been complied with.

               (10) Such defeasance or covenant defeasance shall not result in
        the trust arising from such deposit constituting an investment company
        as defined in the Investment Company Act of 1940, as amended, or such
        trust shall be qualified under such act or exempt from regulation
        thereunder.

               SECTION 15.05. DEPOSITED MONEY AND U.S. GOVERNMENT OBLIGATIONS TO
BE HELD IN TRUST; OTHER MISCELLANEOUS PROVISIONS. Subject to the provisions of
the last paragraph of Section 10.03, all money and U.S. Government Obligations
(including the proceeds thereof) deposited with the Trustee (or other qualifying
trustee collectively, for purposes of this Section 15.05, the "Trustee")
pursuant to Section 15.04 in respect of the Securities shall be held in trust
and applied by the Trustee, in accordance with the provisions of such Securities
and this Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Holders of such Securities, of all sums due and to become due
thereon in respect of principal, premium, if any, and interest. Money so held in
trust shall not be subject to the provisions of Article XII.

               The Company shall pay and indemnify the Trustee against any tax,
fee or other charge imposed on or assessed against the U.S. Government
Obligations deposited pursuant to Section 15.04 or the principal and interest
received in respect thereof other than any such tax, fee or other charge which
by law is for the account of the Holders of the Outstanding Securities.

               Anything in this Article XV to the contrary notwithstanding, the
Trustee shall deliver or pay to the Company from time to time upon Company
Request any money or U.S. Government Obligations held by it as provided in
Section 15.04 which, in the opinion of a nationally recognized firm of
independent public accountants expressed in a written certification thereof
delivered to the Trustee, are in excess of the amount thereof which would then
be required to be deposited to effect an equivalent defeasance or covenant
defeasance.

<PAGE>

                                                                            107

               SECTION 15.06. REINSTATEMENT. If the Trustee or the Paying
Agent is unable to apply any money in accordance with Section 15.02 or 15.03
by reason of any order or judgment of any court or governmental authority
enjoining, restraining or otherwise prohibiting such application, then the
Company's obligations under this Indenture and the Securities shall be
revived and reinstated as though no deposit had occurred pursuant to this
Article XV until such time as the Trustee or Paying Agent is permitted to
apply all such money in accordance with Section 15.02 or 15.03; PROVIDED,
HOWEVER, that if the Company makes any payment of principal of, premium, if
any, or interest on any Security following the reinstatement of its
obligations, the Company shall be subrogated to the rights of the Holders of
such Securities to receive such payment from the money held by the Trustee or
the Paying Agent.

                                   ARTICLE XVI

                                    IMMUNITY

               SECTION 16.01. PERSONAL IMMUNITY OF INCORPORATORS,
SHAREHOLDERS, DIRECTORS AND OFFICERS. No recourse for the payment of the
principal of or interest on the Securities, and no recourse under or upon any
obligation, covenant or agreement contained in this Indenture or in any
indenture supplemental hereto, or in the Securities, or because of any
indebtedness evidenced thereby, shall be had against any incorporator, or
against any past, present or future shareholder, officer or director, as
such, of the Company or any successor corporation, either directly or through
the Company or any successor corporation, under any rule of law, statute or
constitutional provision or by the enforcement of any assessment or by any
legal or equitable proceeding or otherwise, all such liability being
expressly waived and released by the acceptance of the Securities by the
Holders thereof and as part of the consideration for the issue of the
Securities. Each and every Holder of the Securities, by receiving and holding
the same, agrees to the provisions of this Section 16.01 and waives and
releases any and all such recourse, claim and liability.

<PAGE>

               This instrument may be executed in any number of counterparts,
each of which so executed shall be deemed to be an original, but all such
counterparts shall together constitute but one and the same instrument.

               IN WITNESS WHEREOF, the parties hereto have caused this Indenture
to be duly executed as of the day and year first above written.

                                      AFFYMETRIX, INC.

                                      by________________________________________
                                        Name:
                                        Title:

                                      THE BANK OF NEW YORK,

                                      by________________________________________
                                        Name:
                                        Title:

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