Document:

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                                                                     EXHIBIT 4.1

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                                   SCIOS INC.

                                      and

                     WELLS FARGO BANK, NATIONAL ASSOCIATION

                                       as

                                    Trustee
                           ---------------------------

                                   INDENTURE

                           Dated as of August 5, 2002
                           ---------------------------

                 5.50% CONVERTIBLE SUBORDINATED NOTES DUE 2009

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

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                                TABLE OF CONTENTS

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ARTICLE ONE          DEFINITIONS AND INCORPORATION BY REFERENCE............................................1

         SECTION 1.1     Definitions.......................................................................1

         SECTION 1.2     Other Definitions.................................................................7

         SECTION 1.3     Incorporation by Reference of Trust Indenture Act.................................7

         SECTION 1.4     Rules of Construction.............................................................8

ARTICLE TWO          THE SECURITIES........................................................................8

         SECTION 2.1     Form and Dating...................................................................8

         SECTION 2.2     Execution and Authentication......................................................9

         SECTION 2.3     Registrar, Paying Agent and Conversion Agent.....................................10

         SECTION 2.4     Paying Agent to Hold Money in Trust..............................................10

         SECTION 2.5     Securityholder Lists.............................................................10

         SECTION 2.6     Transfer and Exchange............................................................10

         SECTION 2.7     Replacement Securities...........................................................11

         SECTION 2.8     Outstanding Securities...........................................................11

         SECTION 2.9     Securities Held by the Company or an Affiliate...................................12

         SECTION 2.10    Temporary Securities.............................................................12

         SECTION 2.11    Cancellation.....................................................................12

         SECTION 2.12    Defaulted Interest...............................................................12

         SECTION 2.13    CUSIP Numbers....................................................................13

         SECTION 2.14    Deposit of Monies................................................................13

         SECTION 2.15    Book-Entry Provisions for Global Securities......................................13

         SECTION 2.16    Special Transfer Provisions......................................................14

         SECTION 2.17    Restrictive Legends..............................................................18

ARTICLE THREE        REDEMPTION; REPURCHASE...............................................................19

         SECTION 3.1     Right to Redeem; Notices to Trustee..............................................19

         SECTION 3.2     Selection of Securities to Be Redeemed...........................................19

         SECTION 3.3     Notice of Redemption.............................................................20

         SECTION 3.4     Effect of Notice of Redemption...................................................20

         SECTION 3.5     Deposit of Redemption Price......................................................21

         SECTION 3.6     Securities Redeemed in Part......................................................21
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         SECTION 3.7     Conversion Arrangement on Call for Redemption ...................................21

         SECTION 3.8     Repurchase at Option of Holder upon a Change in Control..........................22

ARTICLE FOUR         COVENANTS............................................................................26

         SECTION 4.1     Payment of Securities............................................................26

         SECTION 4.2     Maintenance of Office or Agency..................................................26

         SECTION 4.3     Reports to Holders...............................................................27

         SECTION 4.4     Compliance Certificate...........................................................27

         SECTION 4.5     Stay, Extension and Usury Laws...................................................28

         SECTION 4.6     Corporate Existence..............................................................28

         SECTION 4.7     Notice of Default................................................................28

ARTICLE FIVE         CONSOLIDATION, MERGER AND SALE OF ASSETS.............................................28

         SECTION 5.1     When Company May Merge, etc......................................................28

         SECTION 5.2     Successor Substituted............................................................29

ARTICLE SIX          DEFAULTS AND REMEDIES................................................................29

         SECTION 6.1     Events of Default................................................................29

         SECTION 6.2     Acceleration.....................................................................30

         SECTION 6.3     Other Remedies...................................................................31

         SECTION 6.4     Waiver of Past Defaults..........................................................31

         SECTION 6.5     Control by Majority..............................................................31

         SECTION 6.6     Limitation on Suits..............................................................32

         SECTION 6.7     Rights of Holders to Receive Payment or Convert..................................32

         SECTION 6.8     Collection Suit by Trustee.......................................................32

         SECTION 6.9     Trustee May File Proofs of Claim.................................................32

         SECTION 6.10    Priorities.......................................................................33

         SECTION 6.11    Undertaking for Costs............................................................33

ARTICLE SEVEN        TRUSTEE..............................................................................33

         SECTION 7.1     Duties of Trustee................................................................33

         SECTION 7.2     Rights of Trustee................................................................34

         SECTION 7.3     Individual Rights of Trustee.....................................................35

         SECTION 7.4     Trustee's Disclaimer.............................................................36
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         SECTION 7.5     Notice of Defaults...............................................................36

         SECTION 7.6     Reports by Trustee to Holders....................................................36

         SECTION 7.7     Compensation and Indemnity.......................................................36

         SECTION 7.8     Replacement of Trustee...........................................................37

         SECTION 7.9     Successor Trustee by Merger, etc.................................................38

         SECTION 7.10    Eligibility; Disqualification....................................................38

         SECTION 7.11    Preferential Collection of Claims Against Company................................38

ARTICLE EIGHT        SATISFACTION AND DISCHARGE ..........................................................38

         SECTION 8.1     Termination of Company's Obligations.............................................38

         SECTION 8.2     Application of Trust Money.......................................................39

         SECTION 8.3     Repayment to Company.............................................................39

         SECTION 8.4     Reinstatement....................................................................40

ARTICLE NINE         AMENDMENTS...........................................................................40

         SECTION 9.1     Without Consent of Holders.......................................................40

         SECTION 9.2     With Consent of Holders..........................................................41

         SECTION 9.3     Compliance with Trust Indenture Act..............................................42

         SECTION 9.4     Revocation and Effect of Consents................................................42

         SECTION 9.5     Notation on or Exchange of Securities............................................42

         SECTION 9.6     Trustee Protected................................................................42

ARTICLE TEN          CONVERSION...........................................................................43

         SECTION 10.1    Conversion Privilege; Restrictive Legends........................................43

         SECTION 10.2    Conversion Procedure.............................................................43

         SECTION 10.3    Fractional Shares................................................................44

         SECTION 10.4    Taxes on Conversion..............................................................44

         SECTION 10.5    Company to Provide Stock.........................................................44

         SECTION 10.6    Adjustment of Conversion Price...................................................44

         SECTION 10.7    Effect of Reclassification, Consolidation, Merger or Sale........................53

         SECTION 10.8    Notice of Certain Transactions...................................................53

         SECTION 10.9    Company Determination Final......................................................54

         SECTION 10.10   Trustee's Disclaimer.............................................................54
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ARTICLE ELEVEN       COLLATERAL SECURITY..................................................................54

         SECTION 11.1    Collateral Security..............................................................54

ARTICLE TWELVE       SUBORDINATION........................................................................56

         SECTION 12.1    Securities Subordinated to Senior Indebtedness...................................56

         SECTION 12.2    Subrogation......................................................................58

         SECTION 12.3    Obligation of Company Unconditional..............................................58

         SECTION 12.4    Modification of Terms of Senior Indebtedness.....................................59

         SECTION 12.5    Effectuation of Subordination by Trustee.........................................59

         SECTION 12.6    Knowledge of Trustee.............................................................59

         SECTION 12.7    Trustee's Relation to Senior Indebtedness........................................60

         SECTION 12.8    Rights of Holders of Senior Indebtedness Not Impaired............................60

         SECTION 12.9    Certain Conversions Not Deemed Payment...........................................60

ARTICLE THIRTEEN     MISCELLANEOUS........................................................................61

         SECTION 13.1    Trust Indenture Act Controls.....................................................61

         SECTION 13.2    Notices..........................................................................61

         SECTION 13.3    Communication by Holders with Other Holders......................................62

         SECTION 13.4    Certificate and Opinion as to Conditions Precedent...............................62

         SECTION 13.5    Statements Required in Certificate or Opinion....................................62

         SECTION 13.6    Rules by Trustee and Agents......................................................63

         SECTION 13.7    Legal Holidays...................................................................63

         SECTION 13.8    No Recourse Against Others.......................................................63

         SECTION 13.9    Duplicate Originals..............................................................63

         SECTION 13.10   Governing Law....................................................................63

         SECTION 13.11   No Adverse Interpretation of Other Agreements....................................63

         SECTION 13.12   Successors.......................................................................63

         SECTION 13.13   Separability.....................................................................63

         SECTION 13.14   Table of Contents, Headings, etc.................................................64
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EXHIBITS

Exhibit A  -    Form of Security
Exhibit B  -    Form of Legends
Exhibit C  -    Form of Notice of Transfer Pursuant to Registration Statement

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                             CROSS-REFERENCE TABLE

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   TIA                                                                                          Indenture
 Section                                                                                         Section
-----------                                                                                     ----------
<S>                                                                                               <C>
310(a)(1)....................................................................................     7.10
   (a)(2)....................................................................................     7.10
   (a)(3)....................................................................................     N.A.
   (a)(4)....................................................................................     N.A.
   (a)(5)....................................................................................     N.A.
   (b).......................................................................................     7.8; 7.10; 13.2
   (c).......................................................................................     N.A.
311(a).......................................................................................     7.11
   (b).......................................................................................     7.11
   (c).......................................................................................     N.A.
312(a).......................................................................................     2.5
   (b).......................................................................................     13.3
   (c).......................................................................................     13.3
313(a).......................................................................................     7.6
   (b)(1)....................................................................................     N.A.
   (b)(2)....................................................................................     7.6
   (c).......................................................................................     7.6; 13.2
   (d).......................................................................................     7.6
314(a).......................................................................................     4.3
   (b).......................................................................................     N.A.
   (c)(1)....................................................................................     13.4
   (c)(2)....................................................................................     13.4
   (c)(3)....................................................................................     N.A.
   (d).......................................................................................     11.1
   (e).......................................................................................     13.5
   (f).......................................................................................     N.A.
315(a).......................................................................................     7.1(b)
   (b).......................................................................................     7.5; 13.2
   (c).......................................................................................     7.1(a)
   (d).......................................................................................     7.1(c)
   (e).......................................................................................     6.11
316(a)(last sentence)........................................................................     2.9
   (a)(1)(A).................................................................................     6.5
   (a)(1)(B).................................................................................     6.4
   (a)(2)....................................................................................     N.A.
   (b).......................................................................................     6.7
317(a)(1)....................................................................................     6.8
   (a)(2)....................................................................................     6.9
   (b).......................................................................................     2.4
318(a).......................................................................................     13.1
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           INDENTURE dated as of August 5. 2002 between SCIOS INC., a Delaware
corporation (the "Company"), and WELLS FARGO BANK, NATIONAL ASSOCIATION, as
trustee (the "Trustee").

           Each party agrees as follows for the benefit of the other party and
for the equal and ratable benefit of the Holders of the Company's 5.50%
Convertible Subordinated Notes Due 2009:

                                  ARTICLE ONE

                   DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.1       Definitions.
                  -----------

           "Account Holder" means, initially, Wells Fargo Bank, National
Association, as account holder under the Control Agreement.

           "Affiliate" means, with respect to any specified Person, any other
Person directly or indirectly controlling or controlled by or under direct or
indirect common control with the Company. For this purpose, "control" shall mean
the power to direct the management and policies of a Person through the
ownership of securities, by contract or otherwise.

           "Agent" means any Registrar, Paying Agent, Conversion Agent,
authenticating agent or co-registrar.

           "Applicable Procedures" means, with respect to any transfer or
exchange of beneficial ownership interests in a Global Security, the rules and
procedures of the Depositary that are applicable to such transfer or exchange.

           "Board of Directors" means the board of directors of the Company or
any committee of the Board authorized to act for it hereunder.

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

           "Capital Stock" means any and all shares, interests, participations
or other equivalents (however designated) of capital stock of the Company and
all warrants or options to acquire such capital stock.

           "Collateral Agent" means, initially, Wells Fargo Bank, National
Association, as collateral agent under the Pledge Agreement.

           "Common Stock" means the common stock, par value $.001 per share, of
the Company.

           "Company" means the party named as such above until a successor
replaces it pursuant to an applicable provision hereof and thereafter means the
successor.

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           "Company Request" or "Company Order" means a written request or order
signed on behalf of the Company by two Officers of the Company and delivered to
the Trustee.

           "Control Agreement" means the Control Agreement, dated as of the date
hereof, by and among the Company, the Trustee, the Collateral Agent and the
Account Holder, as such agreement may be amended, restated, supplemented or
otherwise modified from time to time.

           "Conversion Price" means $39.30 per share of Common Stock, as
adjusted pursuant to Article Ten.

           "Corporate Trust Office of the Trustee" shall be at the address of
the Trustee specified in Section 13.2 or such other address as the Trustee may
give notice of to the Company.

           "Default" means any event which is, or after notice or passage of
time or both would be, an Event of Default.

           "Depositary" means The Depository Trust Company, its nominees and
successors.

           "Designated Senior Indebtedness" means any particular Senior
Indebtedness in which the instrument creating or evidencing the Senior
Indebtedness or the assumption or guarantee thereof (or related documents or
agreements to which the Company is a party) expressly provides that such
Indebtedness shall be "Designated Senior Indebtedness" (provided that such
instrument may place limitations and conditions on the right of such Senior
Indebtedness to exercise the rights of Designated Senior Indebtedness).

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

           "Government Securities" means securities that are (i) direct
obligations of the United States of America, the payment of which its full faith
and credit is pledged or (ii) obligations of a Person controlled or supervised
by or 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 at any time prior to
the Stated Maturity of the Securities, and shall also include a depository
receipt issued by a bank or trust company as custodian with respect to any such
Government Securities or a specific payment of interest on or principal of any
such Government Securities held by such custodian for the account of the holder
of a 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 Government Securities for the specific payment of interest on or
principal of the Government Securities evidenced by such depository receipt.

           "Holder" means a Person in whose name a Security is registered on the
Registrar's books.

           "Indebtedness" means, with respect to the Company:

                                      2

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           (1)    all indebtedness, obligations and other liabilities,
contingent or otherwise, for borrowed money, including obligations

                  (a)     in respect of overdrafts, foreign exchange contracts,
                          currency exchange agreements, interest rate protection
                          agreements and any loans or advances from banks,
                          whether or not evidenced by notes or similar
                          instruments, or

                  (b)     evidenced by bonds, debentures, notes or similar
                          instruments, whether or not the recourse of the lender
                          is to all assets or to only a portion thereof, other
                          than any account payable or other accrued current
                          liability or obligation incurred in the ordinary
                          course of business in connection with the obtaining of
                          materials or services,

           (2)    all reimbursement obligations and other liabilities,
                  contingent or otherwise, with respect to letters of credit,
                  bank guarantees or bankers' acceptances,

           (3)    all obligations and liabilities, contingent or otherwise, in
                  respect of leases required, in conformity with generally
                  accepted accounting principles, to be accounted for as
                  capitalized lease obligations on the Company's balance sheet
                  or under other leases for facilities equipment or related
                  assets, whether or not capitalized, entered into or leased for
                  financing purposes, as determined by the Company,

           (4)    all obligations and other liabilities, contingent or
                  otherwise, under any lease or related document, including a
                  purchase agreement, in connection with the lease of real
                  property or improvements thereon (or any personal property
                  included as part of any such lease) which provides that the
                  Company is contractually obligated to purchase or cause a
                  third party to purchase the leased property and thereby
                  guarantee the residual value of leased property to the lessor
                  and all of the Company's obligations under such lease or
                  related documents to purchase the leased property (whether or
                  not such lease transaction is characterized as an operating
                  lease or a capitalized lease in accordance with generally
                  accepted accounting principles),

           (5)    all obligations, contingent or otherwise, with respect to an
                  interest rate, currency or other swap, cap, floor or collar
                  agreement, hedge agreement, forward contract, or other similar
                  instrument or agreement or foreign currency hedge, exchange,
                  purchase or similar instrument or agreement,

           (6)    all direct or indirect guarantees or similar agreements to
                  purchase or otherwise acquire or otherwise assure a creditor
                  against loss in respect of indebtedness, obligations or
                  liabilities or another person of the kind described in clauses
                  (1) through (5) above,

                                      3

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           (7)    any indebtedness or other obligations described in clauses (1)
                  through (6) above secured by any mortgage, pledge, lien or
                  other encumbrance existing on property which is owned or held
                  by the Company, regardless of whether the indebtedness or
                  other obligation secured thereby has been assumed by the
                  Company, and

           (8)    any and all deferrals, renewals, extensions and refundings of,
                  or amendments, modifications or supplements to, any
                  indebtedness, obligation or liability of the kind described in
                  clauses (1) through (7) above.

           "Indenture" means this Indenture as amended, restated or supplemented
or otherwise modified from time to time.

           "interest" means, with respect to any Security, interest on the
Security plus liquidated damages, if any.

           "Issue Date" means (i) August 5, 2002 with respect to the
$150,000,000 aggregate principal amount of Securities issued on such date, and
(ii) with respect to any of up to $25,000,000 aggregate principal amount of
Securities that may be issued on or after August 5, 2002 pursuant to the option
described in Section 2.2, the issue date of such Securities.

           "Lien" means, with respect to any asset, a mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset
given to secure Indebtedness, whether or not filed, recorded or otherwise
perfected under applicable law (including any conditional sale or other title
retention agreement, any lease in the nature thereof, any option or other
agreement to sell or give a security interest in and any filing of or agreement
to give any financing statement, under the Uniform Commercial Code (or
equivalent statutes) of any jurisdiction with respect to any such lien, pledge,
charge or security interest).

           "liquidated damages" has the meaning provided in the Registration
Rights Agreement.

           "Maturity Date" means August 15, 2009.

           "Officer" means the chairman of the board, the chief executive
officer, the president, the chief scientific officer, any senior vice president,
any vice president, the chief financial officer, the treasurer, any assistant
treasurer or the secretary of the Company.

           "Officers' Certificate" means a certificate signed by two Officers of
the Company.

           "Opinion of Counsel" means a written opinion from legal counsel who
may be an employee of or counsel for the Company.

           "Permitted Junior Securities" means (a) shares of stock of any class
of the Company or (b) securities of the Company that are subordinated in right
of payment to all Senior Indebtedness that may be outstanding at the time of
issuance or delivery of such securities to

                                      4

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substantially the same extent as, or greater extent than, the Securities are so
subordinated pursuant to the terms hereunder.

           "Permitted Payments" means payments on the Securities derived from
the Pledged Securities which are pledged to the Collateral Agent for the benefit
of the Trustee and the ratable benefit of the Holders of the Securities in
accordance with the terms and provisions of the Pledge Agreement.

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

           "Pledge Account" means an account established by the Collateral Agent
pursuant to the terms of the Pledge Agreement for the deposit of the Pledged
Securities purchased by the Company.

           "Pledge Agreement" means the Pledge Agreement, dated as of the date
hereof, by and among the Company, the Trustee and the Collateral Agent, as such
agreement may be amended, restated, supplemented or otherwise modified from time
to time.

           "Pledged Securities" means the Government Securities purchased by the
Company and held in the Pledge Account in accordance with the Pledge Agreement.

           "principal" of a debt security means the principal of the security
plus the premium, if any, on the security.

           "QIB" means a "qualified institutional buyer" within the meaning of
Rule 144A under the Securities Act.

           "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of August 5, 2002, by and among the Company and the Initial
Purchasers, as such agreement may be amended, restated, supplemented or
otherwise modified from time to time.

           "Restricted Global Security" means a Global Security that is a
Restricted Security.

           "Restricted Physical Security" means a Physical Security that is a
Restricted Security.

           "Restricted Security" means a Security that constitutes a "Restricted
Security" within the meaning of Rule 144(a)(3) under the Securities Act;
provided, however, that the Trustee shall be entitled to request and
conclusively rely on an opinion of counsel with respect to whether any Security
constitutes a Restricted Security.

           "Rule 144A Global Security" means a permanent Global Security in
registered form representing the aggregate principal amount of Securities sold
in reliance on Rule 144A.

           "SEC" means the Securities and Exchange Commission.

                                      5

<PAGE>

           "Securities" means the 5.50% Convertible Subordinated Notes Due 2009
issued by the Company pursuant to this Indenture.

           "Securities Act" means the Securities Act of 1933, as amended.

           "Senior Indebtedness" means all obligations with respect to
Indebtedness of the Company whether outstanding on the date hereof or thereafter
created, incurred, assumed, guaranteed, or in effect guaranteed, by the Company,
including, without limitation, all deferrals, renewals, extensions or refundings
of, or amendments, modifications or supplements to, the foregoing, unless in the
case of any particular Indebtedness the instrument creating or evidencing the
same or the assumption or guarantee thereof expressly provides that such
Indebtedness shall not be senior in right of payment to the Securities or
expressly provides that such Indebtedness ranks equally in right of payment or
junior to, the Securities; provided, however, that Senior Indebtedness does not
include (i) Indebtedness evidenced by the Securities, (ii) any Indebtedness of
the Company to any Subsidiary, (iii) any obligations for federal, state, local
or other taxes and (iv) or any trade or accounts payable arising in the ordinary
course of business.

           "Significant Subsidiary" means, in respect of any Person, a
Subsidiary of such Person that would constitute a "significant subsidiary" as
such term is defined under Rule 1-02 of Regulation S-X promulgated by the SEC.

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

           "Subsidiary" means (i) a corporation a majority of whose capital
stock with voting power, under ordinary circumstances, to elect directors is at
the time, directly or indirectly, owned by the Company, by one or more
Subsidiaries of the Company or by the Company and one or more Subsidiaries
thereof or (ii) any other Person (other than a corporation) in which the
Company, one or more Subsidiaries thereof or the Company and one or more
Subsidiaries thereof, directly or indirectly, at the date of determination
thereof, have at least majority ownership interest.

           "TIA" means the Trust Indenture Act of 1939 (15 U.S. Code [sec][sec]
77aaa-77bbbb) as in effect on the date of this Indenture, except as provided in
Section 9.3, and except to the extent any amendment to the TIA expressly
provides for application of the TIA as in effect on another date.

           "Trust Officer" means any officer of the Trustee assigned by the
Trustee to administer this Indenture.

           "Trustee" means the party named as such in this Indenture until a
successor replaces it in accordance with the provisions hereof and thereafter
means the successor.

           "Unrestricted Global Security" means a Global Security that is not a
Restricted Security.

                                      6

<PAGE>

           "Unrestricted Physical Security" means a Physical Security that is
not a Restricted Security.

SECTION 1.2       Other Definitions.
                  -----------------

      Term                                       Defined in Section
      ----                                       ------------------

"Bankruptcy Law"..........................               6.1
"Business Day"............................              13.7
"Change in Control".......................               3.8(l)
"Closing Price"...........................              10.6(g)
"Common Dividend Amount"..................              10.6(e)
"Company Notice"..........................               3.8(b)
"Conversion Agent"........................               2.3
"Current Market Price"....................              10.6(g)
"Custodian"...............................               6.1
"Event of Default"........................               6.1
"fair market value".......................              10.6(g)
"Global Security".........................               2.1
"Initial Purchasers"......................               2.2
"Legal Holiday"...........................              13.7
"Market Capitalization"...................              10.6(e)
"Participants"............................               2.15(a)
"Paying Agent"............................               2.3
"Payment Blockage Notice".................              12.1(b)
"Payment Blockage Period".................              12.1(b)
"Payment Default".........................              12.1(b)
"Physical Securities".....................               2.15(b)
"Private Placement Legend"................               2.17
"Record Date".............................              10.6(g)
"Registrar"...............................               2.3
"Repurchase Date".........................               3.8(a)
"Repurchase Price"........................               3.8(a)
"Subject Securities"......................              10.6(d)
"Transfer Certificate"....................               2.6
"Trading Day".............................              10.6(g)
"Trigger Event"...........................              10.6(b)

SECTION 1.3       Incorporation by Reference of Trust Indenture Act.
                  -------------------------------------------------

           Whenever this Indenture refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

           The following TIA terms have the following meanings:

           "Commission" means the SEC;

                                      7

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           "indenture securities" means the Securities;

           "indenture security holder" means a Holder;

           "indenture to be qualified" means this Indenture;

           "indenture trustee" or "institutional trustee" means the Trustee; and

           "obligor" on the indenture securities means the Company.

           All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by SEC rule under the TIA
and not otherwise defined herein have the meanings so assigned to them.

SECTION 1.4       Rules of Construction.
                  ---------------------

           Unless the context otherwise requires:

           (1)    a term has the meaning assigned to it;

           (2)    an accounting term not otherwise defined has the meaning
     assigned to it in accordance with generally accepted accounting principles
     in effect from time to time;

           (3)    "or" is not exclusive;

           (4)    words in the singular include the plural and in the plural
     include the singular;

           (5)    provisions apply to successive events and transactions; and

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

                                  ARTICLE TWO

                                 THE SECURITIES

SECTION 2.1       Form and Dating.
                  ---------------

           The Securities and the Trustee's certificate of authentication shall
be substantially in the form set forth in Exhibit A, which is incorporated in
and forms a part of this Indenture. The Securities may have notations, legends
or endorsements required by law, stock exchange rule or usage. Each Security
shall be dated the date of its authentication.

           Securities offered and sold in reliance on Rule 144A shall be issued
initially in the form of one or more Global Securities, substantially in the
form set forth in Exhibit A (the "Global Security"). The aggregate principal
amount of the Global Security may from time to time be increased or decreased by
adjustments made on the records of the Trustee, as custodian for the Depositary,
as hereinafter provided.

                                      8

<PAGE>

SECTION 2.2       Execution and Authentication.
                  ----------------------------

           One Officer shall sign the Securities for the Company by manual or
facsimile signature.

           If an Officer whose signature is on a Security no longer holds that
office at the time the Security is authenticated, the Security shall
nevertheless be valid.

           A Security shall not be valid until authenticated by the manual
signature of the Trustee. The signature shall be conclusive evidence that the
Security has been authenticated under this Indenture.

           Upon a written order of the Company signed by two Officers of the
Company, the Trustee shall authenticate Securities for original issue in the
principal amount of $150,000,000 and such additional principal amounts, if any,
as shall be determined pursuant to the next sentence of this Section 2.2. Upon
receipt by the Trustee of an Officers' Certificate stating that the Initial
Purchasers have elected to purchase from the Company a specified principal
amount of additional Securities, not to exceed $25,000,000, pursuant to Section
l of the purchase agreement, dated as of July 30, 2002 (the "Purchase
Agreement"), by and among the Company, as issuer, and J.P. Morgan Securities
Inc., Lehman Brothers Inc., SG Cowen Securities Corporation, Needham & Company,
Inc., Adams, Harkness & Hill, Inc. and Prudential Securities Incorporated, as
initial purchasers (the "Initial Purchasers"), the Trustee shall authenticate
and deliver such specified principal amount of additional Securities to or upon
the written order of the Company signed as provided in the immediately preceding
sentence. Such Officers' Certificate must be received by the Trustee at least
two full Business Days prior to the proposed date for delivery of such
additional Securities, but, in any case, not later than August 29, 2002. The
aggregate principal amount of Securities outstanding at any time may not exceed
$175,000,000 except as provided in Section 2.7.

           Upon a written order of the Company signed by two Officers of the
Company, the Trustee shall authenticate Securities not bearing the Private
Placement Legend to be issued to a transferee when sold pursuant to an effective
registration statement under the Securities Act in accordance with the
provisions of this Indenture and the Securities.

           The Trustee may appoint an authenticating agent acceptable to the
Company to authenticate Securities. An authenticating agent may authenticate
Securities whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such Agent. An
authenticating agent has the same rights as an Agent to deal with the Company or
an Affiliate.

           The Securities shall be issuable only in registered form without
coupons and only in denominations of $1,000 principal amount and any integral
multiple thereof. The Securities shall bear interest at the rate, calculated and
paid, as provided in the form of Security set forth in Exhibit A.

                                      9

<PAGE>

SECTION 2.3       Registrar, Paying Agent and Conversion Agent.
                  --------------------------------------------

           The Company shall maintain an office or agency where Securities may
be presented for registration of transfer or for exchange ("Registrar"), an
office or agency where Securities may be presented for payment ("Paying Agent")
and an office or agency where Securities may be presented for conversion
("Conversion Agent"). The Registrar shall keep a register of the Securities and
of their transfer and exchange. The Company may appoint or change one or more
co-registrars, one or more additional paying agents and one or more additional
conversion agents without notice and may act in any such capacity on its own
behalf. The term "Registrar" includes any co-registrar; the term "Paying Agent"
includes any additional paying agent; and the term "Conversion Agent" includes
any additional conversion agent.

           The Company shall enter into an appropriate agency agreement with any
Agent not a party to this Indenture. The agreement shall implement the
provisions of this Indenture that relate to such Agent. The Company shall notify
the Trustee of the name and address of any Agent not a party to this Indenture.
If the Company fails to maintain a Registrar, Paying Agent or Conversion Agent,
the Trustee shall act as such.

           The Company initially appoints the Trustee as Paying Agent, Registrar
and Conversion Agent.

SECTION 2.4       Paying Agent to Hold Money in Trust.
                  -----------------------------------

           Prior to 11:00 a.m., New York City time, on each due date of the
principal or interest, if any, on any Securities, the Company shall deposit with
the Paying Agent a sum sufficient to pay such principal or interest, if any,
becoming due. Each Paying Agent shall hold in trust for the benefit of the
Holders or the Trustee all monies held by the Paying Agent for the payment of
principal of or interest on the Securities, and shall notify the Trustee of any
default by the Company in making any such payment. While any such default
continues, the Trustee may require a Paying Agent to pay all money held by it to
the Trustee. The Company at any time may require a Paying Agent to pay all money
held by it to the Trustee. Upon payment over to the Trustee, the Paying Agent
shall have no further liability for the money. If the Company acts as Paying
Agent, it shall, prior to 11:00 a.m., New York City time, on each due date of
the principal or interest on any Securities, segregate and hold as a separate
trust fund all money held by it as Paying Agent.

SECTION 2.5       Securityholder Lists.
                  --------------------

           The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Holders. If the Trustee is not the Registrar, the Company shall furnish to the
Trustee on or before each interest payment date and at such other times as the
Trustee may request in writing a list, in such form and as of such date as the
Trustee may reasonably require, of the names and addresses of Holders.

SECTION 2.6       Transfer and Exchange.
                  ---------------------

           Subject to compliance with any applicable additional requirements
contained in Section 2.16, where Securities are presented to the Registrar with
a request to register their

                                      10

<PAGE>

transfer or to exchange them for an equal principal amount of Securities of
other authorized denominations, the Registrar shall register the transfer or
make the exchange if its requirements for such transaction are met; provided,
however, that every Security presented or surrendered for registration of
transfer or exchange shall be duly endorsed or accompanied by an assignment form
and, if applicable, a transfer certificate each in the form included in Exhibit
A attached hereto (the "Transfer Certificate"). To permit registrations of
transfer and exchanges, the Company shall execute and the Trustee shall
authenticate Securities at the Registrar's request. The Company or the Trustee,
as the case may be, shall not be required (a) to issue or authenticate, register
the transfer of or exchange any Security during a period beginning at the
opening of business 10 Business Days before the mailing of a notice of
redemption of the Securities selected for redemption under Section 3.2 and
ending at the close of business on the day of such mailing, or (b) to register
the transfer of or exchange any Security so selected for redemption in whole or
in part, except the unredeemed portion of Securities being redeemed in part.

           No service charge shall be made for any registration of transfer,
exchange or conversion 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 transfer, registration of transfer or exchange of
Securities, other than exchanges pursuant to Sections 2.10, 3.6, 9.5 or 10.2 not
involving any transfer.

SECTION 2.7       Replacement Securities.
                  ----------------------

           If the Holder of a Security claims that the Security has been
mutilated, lost, destroyed or wrongfully taken, the Company shall issue and the
Trustee shall authenticate a replacement Security if the Trustee's requirements
are met and, in the case of a mutilated Security, such mutilated Security is
surrendered to the Trustee. In the case of lost, destroyed or wrongfully taken
Securities, if required by the Trustee or the Company, an indemnity bond must be
provided by the Holder that is sufficient in the judgment of both the Company
and the Trustee to protect the Company, the Trustee or any Agent from any loss
that any of them may suffer if a Security is replaced. The Company or the
Trustee may charge for its expenses in replacing a Security.

           In case any such mutilated, lost, destroyed or wrongfully taken
Security has become or is about to become due and payable, the Company in its
discretion may, instead of issuing a new Security, pay such Security when due.

           Every replacement Security is an additional obligation of the
Company.

SECTION 2.8       Outstanding Securities.
                  ----------------------

           Securities outstanding at any time are all the Securities
authenticated by the Trustee except for those converted, those cancelled by it,
those delivered to it for cancellation and those described in this Section as
not outstanding. A Security does not cease to be outstanding because the Company
or one of its Subsidiaries or Affiliates holds the Security.

                                      11

<PAGE>

           If a Security is replaced pursuant to Section 2.7, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it, or a court
holds, that the replaced Security is held by a protected purchaser.

           If the Paying Agent (other than the Company) holds on a redemption
date, Repurchase Date or the Maturity Date money sufficient to pay Securities
payable on that date, then on and after that date, such Securities shall be
deemed to be no longer outstanding and interest on them shall cease to accrue.

SECTION 2.9       Securities Held by the Company or an Affiliate.
                  ----------------------------------------------

           In determining whether the Holders of the required aggregate
principal amount of Securities have concurred in any direction, waiver or
consent, Securities owned by the Company or a Subsidiary or an Affiliate shall
be disregarded, except that for the purposes of determining whether the Trustee
shall be protected in relying on any such direction, waiver or consent, only
Securities that a Trust Officer actually knows are so owned shall be so
disregarded.

SECTION 2.10      Temporary Securities.
                  --------------------

           Until definitive Securities are ready for delivery, the Company may
prepare and the Trustee shall authenticate temporary Securities. Temporary
Securities shall be substantially in the form of definitive Securities but may
have variations that the Company considers appropriate for temporary Securities.
Without unreasonable delay, the Company shall prepare and the Trustee shall
authenticate definitive Securities in exchange for temporary Securities.

SECTION 2.11      Cancellation.
                  ------------

           The Company at any time may deliver Securities to the Trustee for
cancellation. The Registrar, Paying Agent and Conversion Agent shall forward to
the Trustee any Securities surrendered to them for registration of transfer,
exchange, payment or conversion. The Trustee shall cancel all Securities
surrendered for registration of transfer, exchange, payment, conversion or
cancellation and the Trustee shall dispose of such cancelled Securities in its
customary manner. The Company may not issue new Securities to replace Securities
that it has paid or delivered to the Trustee for cancellation or that any Holder
has converted pursuant to Article Ten.

SECTION 2.12      Defaulted Interest.
                  ------------------

           If and to the extent the Company defaults in a payment of interest on
the Securities, it shall pay the defaulted interest in any lawful manner plus,
to the extent not prohibited by applicable statute or case law, interest payable
on the defaulted interest at the rate provided in the form of Security set forth
in Exhibit A. It may pay the defaulted interest to the Persons who are Holders
on a subsequent special record date. The Company shall fix such record date and
payment date. At least 15 days before a special record date, the Company shall
mail to Holders a notice that states the record date, payment date and amount of
interest to be paid.

                                      12

<PAGE>

SECTION 2.13      CUSIP Numbers.
                  -------------

           The Company in issuing the Securities may use one or more "CUSIP"
numbers, and if so, the Trustee shall use the CUSIP numbers in notices of
redemption or exchange as a convenience to Holders; provided, however, that no
representation is hereby deemed to be made by the Trustee as to the correctness
or accuracy of the CUSIP numbers printed in the notice or on the Securities, and
that reliance may be placed only on the other identification numbers printed on
the Securities. The Company shall promptly notify the Trustee of any change in
the CUSIP number.

SECTION 2.14      Deposit of Monies.
                  -----------------

           Prior to 11:00 a.m., New York City time, on each interest payment
date, redemption date, Repurchase Date and the Maturity Date, the Company shall
have deposited with the Paying Agent in immediately available funds money
sufficient to make cash payments, if any, due on such interest payment date,
redemption date, Repurchase Date and the Maturity Date, as the case may be, in a
timely manner which permits the Paying Agent to remit payment to the Holders on
such interest payment date, Maturity Date, redemption date and Repurchase Date,
as the case may be.

SECTION 2.15      Book-Entry Provisions for Global Securities.
                  -------------------------------------------

           (a)    The Global Securities initially shall (i) be registered in the
name of the Depositary or the nominee of such Depositary, (ii) be delivered to
the Trustee as custodian for such Depositary and (iii) bear the legend for
Global Securities as set forth in Exhibit B(II).

           Members of, or participants in, the Depositary ("Participants") shall
have no rights under this Indenture with respect to any Global Security held on
their behalf by the Depositary, or the Trustee as its custodian, or under the
Global Security, and the Depositary may be treated by the Company, the Trustee
and any agent of the Company or the Trustee as the absolute owner of the Global
Security for all purposes whatsoever. 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 impair, as between the Depositary
and Participants, the operation of customary practices governing the exercise of
the rights of a Holder of any Security.

           (b)    Permanent certificated Securities in registered form, in the
form set forth in Exhibit A (the "Physical Securities"), shall be transferred to
all beneficial owners in exchange for their beneficial interests in Global
Securities if (i) the Depositary notifies the Company that it is unwilling or
unable to continue as Depositary for any Global Security and a successor
Depositary is not appointed by the Company or the Depository within 90 days of
such notice or (ii) an Event of Default has occurred and is continuing and the
Registrar has received a written request from the Depositary to issue Physical
Securities.

           (c)    In connection with any transfer or exchange of a portion of
the beneficial interest in a Global Security to beneficial owners pursuant to
paragraph (b), the Registrar shall (if one or more Physical Securities are to be
issued) reflect on its books and records the date and a decrease in the
aggregate principal amount of such Global Security in an amount equal to the

                                      13

<PAGE>

aggregate initial aggregate principal amount of the beneficial interest in the
Global Security to be transferred, and the Company shall execute and the Trustee
shall authenticate and deliver one or more Physical Securities of authorized
denominations in an aggregate principal amount equal to the aggregate principal
amount of the beneficial interest in the Global Security so transferred.

           (d)    In connection with the transfer of a Global Security in its
entirety to beneficial owners pursuant to paragraph (b) of this Section 2.15,
such Global Security shall be deemed to be surrendered to the Trustee for
cancellation, and the Company shall execute, and the Trustee shall upon written
instructions from the Company authenticate and deliver, to each beneficial owner
identified by the Depositary in exchange for its beneficial interest in such
Global Security, an equal aggregate principal amount of Physical Securities of
authorized denominations.

           (e)    Any Physical Security constituting a Restricted Security
delivered in exchange for an interest in a Global Security pursuant to paragraph
(b) or (c) of this Section 2.15 shall, except as otherwise provided by Section
2.16, bear the Private Placement Legend.

           (f)    The Holder of any Global Security may grant proxies and
otherwise authorize any Person, including Participants and Persons that may hold
interests through Participants, to take any action which a Holder is entitled to
take under this Indenture or the Securities.

SECTION 2.16      Special Transfer Provisions.
                  ---------------------------

           (a)    (1)    In the event that Physical Securities are to be issued
in exchange for beneficial interests in Global Securities pursuant to Section
2.15, only Restricted Physical Securities shall be issued in exchange for
beneficial interests in Restricted Global Securities, and only Unrestricted
Physical Securities shall be issued in exchange for beneficial interests in
Unrestricted Global Securities. Physical Securities issued in exchange for
beneficial interests in Global Securities shall be registered in such names and
shall be in such authorized denominations as the Depositary, pursuant to
instructions from its direct or indirect participants or otherwise, shall
instruct the Trustee. The Trustee shall deliver or cause to be delivered such
Physical Securities to the Persons in whose names such Securities are so
registered. Such exchange shall be effected in accordance with the Applicable
Procedures.

                  (2)    Notwithstanding any other provisions of this Indenture
other than the provisions set forth in Section 2.15 and Section 2.16(a)(l), a
Global Security may not be transferred as a whole except by the Depositary to a
nominee of the Depositary or by a nominee of the Depositary to the Depositary or
another nominee of the Depositary or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary.

           (b)    In the event that Physical Securities are issued in exchange
for beneficial interests in Global Securities in accordance with Section 2.15(b)
of this Indenture, on or after such event when Physical Securities are presented
by a Holder to a Registrar with a request:

                  (x)    to register the transfer of the Physical Securities to
a Person who will take delivery thereof in the form of Physical Securities only;
or

                                      14

<PAGE>

                  (y)    to exchange such Physical Securities for an equal
principal amount of Physical Securities of other authorized denominations, such
Registrar shall register the transfer or make the exchange as requested;

                  provided, however, that the Physical Securities presented or
surrendered for register of transfer or exchange:

                  (1)    shall be duly endorsed or accompanied by a Transfer
Certificate; and

                  (2)    in the case of a Restricted Physical Security, such
request shall be accompanied by the following additional information and
documents, as applicable:

                         (i)     if such Restricted Physical Security is being
delivered to the Registrar by a Holder for registration in the name of such
Holder, without transfer, or such Restricted Physical Security is being
transferred to the Company or a Subsidiary of the Company, a certification to
that effect from such Holder (in substantially the form set forth in the
Transfer Certificate);

                         (ii)    if such Restricted Physical Security is being
transferred to a Person the Holder reasonably believes is a QIB in accordance
with Rule 144A or pursuant to an effective registration statement under the
Securities Act, a certification to that effect from such Holder (in
substantially the form set forth in the Transfer Certificate); or

                         (iii)   if such Restricted Physical Security is being
transferred (i) pursuant to an exemption from the registration requirements of
the Securities Act in accordance with Rule 144 or (ii) pursuant to an exemption
from the registration requirements of the Securities Act (other than pursuant to
Rule 144A or Rule 144) and as a result of which, in the case of a Security
transferred pursuant to this clause (ii), such Security shall cease to be a
"Restricted Security" within the meaning of Rule 144, a certification to that
effect from the Holder (in substantially the form set forth in the Transfer
Certificate) and, if the Company or such Registrar so requests, a customary
opinion of counsel, certificates and other information reasonably acceptable to
the Company and such Registrar to the effect that such transfer is in compliance
with the registration requirements of the Securities Act.

           (c)    Any Person having a beneficial interest in a Restricted Global
Security may upon request, subject to the Applicable Procedures, transfer such
beneficial interest to a Person who is required or permitted to take delivery
thereof in the form of an Unrestricted Global Security. Upon receipt by the
Trustee of written instructions, or such other form of instructions as is
customary for the Depositary, from the Depositary or its nominee on behalf of
any Person having a beneficial interest in a Restricted Global Security and the
following additional information and documents in such form as is customary for
the Depositary from the Depositary or its nominee on behalf of the Person having
such beneficial interest in the Restricted Global Security (all of which may be
submitted by facsimile or electronically):

                  (1)    if such beneficial interest is being transferred
pursuant to an effective registration statement under the Securities Act, a
certification to that effect from the transferor (in substantially the form set
forth in the Transfer Certificate); or

                                      15

<PAGE>

                  (2)    if such beneficial interest is being transferred (i)
pursuant to an exemption from the registration requirements of the Securities
Act in accordance with Rule 144 or (ii) pursuant to an exemption from the
registration requirements of the Securities Act (other than pursuant to Rule
144A or Rule 144) and as a result of which, in the case of a Security
transferred pursuant to this clause (ii), such Security shall cease to be a
"restricted security" within the meaning of Rule 144, a certification to that
effect from the transferor (in substantially the form set forth in the Transfer
Certificate) and, if the Company or the Trustee so requests, a customary opinion
of counsel, certificates and other information reasonably acceptable to the
Company and the Trustee to the effect that such transfer is in compliance with
the registration requirements of the Securities Act, the Trustee, as Registrar,
shall reduce or cause to be reduced the aggregate principal amount of the
Restricted Global Security by the appropriate principal amount and shall
increase or cause to be increased the aggregate principal amount of the
Unrestricted Global Security by a like principal amount. Such transfer shall
otherwise be effected in accordance with the Applicable Procedures. If no
Unrestricted Global Security is then outstanding, the Company shall execute and
the Trustee shall, upon receipt of a Company Order (which the Company agrees to
deliver promptly), authenticate and deliver an Unrestricted Global Security.

           (d)    Any Person having a beneficial interest in an Unrestricted
Global Security may upon request, subject to the Applicable Procedures, transfer
such beneficial interest to a Person who is required or permitted to take
delivery thereof in the form of a Restricted Global Security (it being
understood that only QIBs may own beneficial interests in Restricted Global
Securities). Upon receipt by the Trustee of written instructions or such other
form of instructions as is customary for the Depositary, from the Depositary or
its nominee, on behalf of any Person having a beneficial interest in an
Unrestricted Global Security and, in such form as is customary for the
Depositary, from the Depositary or its nominee on behalf of the Person having
such beneficial interest in the Unrestricted Global Security (all of which may
be submitted by facsimile or electronically) a certification from the transferor
(in substantially the form set forth in the Transfer Certificate) to the effect
that such beneficial interest is being transferred to a Person that the
transferor reasonably believes is a QIB in accordance with Rule 144A. The
Trustee, as Registrar, shall reduce or cause to be reduced the aggregate
principal amount of the Unrestricted Global Security by the appropriate
principal amount and shall increase or cause to be increased the aggregate
principal amount of the Restricted Global Security by a like principal amount.
Such transfer shall otherwise be effected in accordance with the Applicable
Procedures. If no Restricted Global Security is then outstanding, the Company
shall execute and the Trustee shall, upon receipt of a Company Order (which the
Company agrees to deliver promptly), authenticate and deliver a Restricted
Global Security.

           (e)    In the event that Physical Securities are issued in exchange
for beneficial interests in Global Securities and, thereafter, the events or
conditions specified in Section 2.15(b) which required such exchange shall cease
to exist, the Company shall mail notice to the Trustee and to the Holders
stating that Holders may exchange Physical Securities for interests in Global
Securities by complying with the procedures set forth in this Indenture and
briefly describing such procedures and the events or circumstances requiring
that such notice be given. Thereafter, if Physical Securities are presented by a
Holder to a Registrar with a request:

                                      16

<PAGE>

                  (x)    to register the transfer of such Physical Securities to
a Person who will take delivery thereof in the form of a beneficial interest in
a Global Security, which request shall specify whether such Global Security will
be a Restricted Global Security or an Unrestricted Global Security; or

                  (y)    to exchange such Physical Securities for an equal
principal amount of beneficial interests in a Global Security, which beneficial
interests will be owned by the Holder transferring such Physical Securities
(provided that in the case of such an exchange, Restricted Physical Securities
may be exchanged only for Restricted Global Securities and Unrestricted Physical
Securities may be exchanged only for Unrestricted Global Securities), the
Registrar shall register the transfer or make the exchange as requested by
canceling such Physical Security and causing, or directing the Registrar to
cause, the aggregate principal amount of the applicable Global Security to be
increased accordingly and, if no such Global Security is then outstanding, the
Company shall issue and the Trustee shall authenticate and deliver a new Global
Security;

                  provided, however, that the Physical Securities presented or
surrendered for registration of transfer or exchange:

                  (1)    shall be duly endorsed or accompanied by a Transfer
Certificate;

                  (2)    in the case of a Restricted Physical Security to be
transferred for a beneficial interest in an Unrestricted Global Security, such
request shall be accompanied by the following additional information and
documents, as applicable:

                         (i)     if such Restricted Physical Security is being
transferred pursuant to an effective registration statement under the Securities
Act, a certification to that effect from such Holder (in substantially the form
set forth in the Transfer Certificate); or

                         (ii)    if such Restricted Physical Security is being
transferred pursuant to (i) an exemption from the registration requirements of
the Securities Act in accordance with Rule 144 or (ii) pursuant to an exemption
from the registration requirements of the Securities Act (other than pursuant to
Rule 144A or Rule 144) and as a result of which, in the case of a Security
transferred pursuant to this clause (ii), such Security shall cease to be a
"Restricted Security" within the meaning of Rule 144, a certification to that
effect from such Holder (in substantially the form set forth in the Transfer
Certificate), and, if the Company or the Registrar so requests, a customary
opinion of counsel, certificates and other information reasonably acceptable to
the Company and the Trustee to the effect that such transfer is in compliance
with the registration requirements of the Securities Act;

                  (3)    in the case of a Restricted Physical Security to be
transferred or exchanged for a beneficial interest in a Restricted Global
Security, such request shall be accompanied by a certification from such Holder
(in substantially the form set forth in the Transfer Certificate) to the effect
that such Restricted Physical Security is being transferred to a Person the
Holder reasonably believes is a QIB (which, in the case of an exchange, shall be
such Holder) in accordance with Rule 144A;

                                      17

<PAGE>

                  (4)    in the case of an Unrestricted Physical Security to be
transferred or exchanged for a beneficial interest in an Unrestricted Global
Security, such request need not be accompanied by any additional information or
documents; and

                  (5)    in the case of an Unrestricted Physical Security to be
transferred or exchanged for a beneficial interest in a Restricted Global
Security, such request shall be accompanied by a certification from such Holder
(in substantially the form set forth in the Transfer Certificate) to the effect
that such Unrestricted Physical Security is being transferred to a Person the
Holder reasonably believes is a QIB (which, in the case of an exchange, shall be
such Holder) in accordance with Rule 144A.

           (f)    Transfers to the Company. Nothing in this Indenture or in the
Securities shall prohibit the sale or other transfer of any Securities
(including beneficial interests in Global Securities) to the Company or any of
its Subsidiaries, which Securities shall thereupon be cancelled in accordance
with Section 2.11.

SECTION 2.17      Restrictive Legends.
                  -------------------

           (a)    Except as permitted by Sections 2.17(b) and (c), each Global
Security and Physical Security (and all Securities issued in exchange therefor
or upon registration of transfer or replacement thereof) shall bear a legend as
set forth in Exhibit B(I) hereto. Each Restricted Security shall have attached
thereto a Transfer Certificate.

           (b)    Upon any sale or transfer of a Restricted Security (w) after
the expiration of the holding period applicable to sales of the Securities under
Rule 144(k) of the Securities Act, (x) pursuant to Rule 144, (y) pursuant to an
effective registration statement under the Securities Act or (z) pursuant to any
other available exemption (other than Rule 144A) from the registration
requirements of the Securities Act and as a result of which, in the case of a
Security transferred pursuant to this clause (z), such Security shall cease to
be a "restricted security" within the meaning of Rule 144:

                  (i)    in the case of any Restricted Physical Security, any
Registrar shall permit the Holder thereof to exchange such Restricted Physical
Security for an Unrestricted Physical Security, or (under the circumstances
described in Section 2.16(e)) to transfer such Restricted Physical Security to a
transferee who shall take such Security in the form of a beneficial interest in
an Unrestricted Global Security, and in each case shall rescind any restriction
on the transfer of such Security; provided, however, that the Holder of such
Restricted Physical Security shall, in connection with such exchange or
transfer, comply with the other applicable provisions of this Section 2.17; and

                  (ii)   in the case of any beneficial interest in a Restricted
Global Security, the Trustee shall permit the beneficial owner thereof to
transfer such beneficial interest to a transferee who shall take such interest
in the form of a beneficial interest in an Unrestricted Global Security and
shall rescind any restriction on transfer of such beneficial interest; provided,
that such Unrestricted Global Security shall continue to be subject to the
provisions of Section 2.16(a)(2); and provided, further, that the owner of such
beneficial interest shall, in connection with such transfer, comply with the
other applicable provisions of this Section 2.12.

                                      18

<PAGE>

           (c)    Upon the exchange, registration of transfer or replacement of
Securities not bearing the legend described in paragraph (1) above, the Company
shall execute, and the Trustee shall authenticate and deliver Securities that do
not bear such legend and that do not have a Transfer Certificate attached
thereto.

           (d)    After the expiration of the holding period pursuant to Rule
144(k) of the Securities Act, the Company may with the consent of the Holder of
a Restricted Global Security or Restricted Physical Security, remove any
restriction of transfer on such Security, and the Company shall execute, and the
Trustee shall authenticate and deliver Securities that do not bear such legend
and that do not have a Transfer Certificate attached thereto.

                                 ARTICLE THREE

                             REDEMPTION; REPURCHASE

SECTION 3.1       Right to Redeem; Notices to Trustee.
                  -----------------------------------

           The Securities may be redeemed at the election of the Company, as a
whole or from time to time in part, at any time on or after August 19, 2005, on
at least 30 days' and not more than 60 days' notice at the redemption prices
specified in paragraph 6 of the form of Security attached hereto as Exhibit A,
together with accrued and unpaid interest up to, but not including, the
redemption date; provided that if the redemption date is an interest payment
date, the accrued interest will be paid in the ordinary course.

           If the Company elects to redeem Securities pursuant to this Section
3.1 and paragraph 6 of the Securities, it shall notify the Trustee at least 45
days prior to the redemption date (unless a shorter notice period shall be
satisfactory to the Trustee) of the redemption date and the aggregate principal
amount of Securities to be redeemed. If the Company wants to credit against any
such redemption Securities it has not previously delivered to the Trustee for
cancellation (other than Securities repurchased pursuant to Section 3.8), it
shall deliver the Securities with the notice.

SECTION 3.2       Selection of Securities to Be Redeemed.
                  --------------------------------------

           If less than all the outstanding Securities are to be redeemed, the
Trustee shall select the Securities to be redeemed on either a pro rata basis or
by lot or such other method as the Trustee shall deem fair and equitable. The
Trustee shall make the selection from Securities outstanding and not previously
called for redemption. The Trustee may select for redemption portions of the
principal of Securities that have denominations larger than $1,000 principal
amount. Securities and portions of them it selects shall be in amounts of $1,000
principal amount or integral multiples of $1,000 principal amount. Provisions of
this Indenture that apply to Securities called for redemption also apply to
portions of Securities called for redemption.

           The Registrar need not register the transfer of or exchange any
Securities selected for redemption. Also, the Registrar need not transfer or
exchange any Securities for a period of 10 days before selecting Securities to
be redeemed.

                                      19

<PAGE>

SECTION 3.3       Notice of Redemption.
                  --------------------

           At least 30 days but not more than 60 days before a redemption date,
the Company shall mail by first-class mail or cause to be mailed a notice of
redemption to each Holder whose Securities are to be redeemed.

           The notice shall identify the Securities and the aggregate principal
amount thereof to be redeemed and shall state:

           (1)    the redemption date;

           (2)    the redemption price, plus the amount of accrued and unpaid
     interest to be paid on the Securities called for redemption;

           (3)    the then current Conversion Price;

           (4)    the name and address of the Paying Agent and Conversion Agent;

           (5)    the date on which the right to convert the principal of the
     Securities called for redemption will terminate and the place or places
     where such Securities may be surrendered for conversion;

           (6)    that Holders who want to convert Securities must satisfy the
     requirements in Article Ten;

           (7)    that Securities called for redemption must be surrendered to
     the Paying Agent to collect the redemption price;

           (8)    that interest on Securities called for redemption ceases to
     accrue on and after the redemption date; and

           (9)    the CUSIP number of the Securities.

           The date on which the right to convert the principal of the
Securities called for redemption will terminate shall be at the close of
business on the Business Day prior to the redemption date.

           At the Company's Request (which request shall be furnished to the
Trustee at least 40 days prior to the redemption date (unless a shorter period
shall be acceptable to the Trustee)), the Trustee shall give the notice of
redemption in the Company's name and at the Company's expense; provided that the
form and content of such notice shall be prepared by the Company.

SECTION 3.4       Effect of Notice of Redemption.
                  ------------------------------

           Once notice of redemption is mailed, Securities called for redemption
become due and payable on the redemption date at the redemption price plus
accrued and unpaid interest to, but excluding, the date of redemption, and, on
and after such date (unless the Company shall

                                      20

<PAGE>

default in the payment of the redemption price), such Securities shall cease to
bear interest. Upon surrender to the Paying Agent, such Securities shall be paid
at the redemption price plus accrued interest to, but excluding the redemption
date, unless the redemption date is an interest payment date, in which case the
accrued interest will be paid in the ordinary course.

SECTION 3.5       Deposit of Redemption Price.
                  ---------------------------

           On or prior to the redemption date, the Company shall deposit with
the Trustee or with a Paying Agent pursuant to Section 2.14 money in funds
immediately available on the redemption date sufficient to pay the redemption
price of and accrued interest on all Securities to be redeemed on that date. The
Paying Agent shall return to the Company, as soon as practicable, any money not
required for that purpose because of conversion of Securities.

SECTION 3.6       Securities Redeemed in Part.
                  ---------------------------

           Upon surrender of a Security that is redeemed in part, the Company
shall execute and the Trustee shall authenticate for the Holder a new Security
equal in principal amount to the unredeemed portion of the Security surrendered.

           If a portion of a Holder's Securities is selected for partial
redemption and that Holder converts a portion of that Holder's Securities, the
converted portion shall be deemed (as far as may be) to be the portion selected
for redemption.

SECTION 3.7       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 called for redemption
by an agreement with one or more investment bankers or other purchasers to
purchase such Securities by paying in cash to a Paying Agent (other than the
Company or any of its Affiliates) in trust for the Holders, on or before 11:00
a.m., New York City time, on the redemption date, an amount that, together with
any amounts deposited with such Paying Agent by the Company for the redemption
of such Securities, is not less than the redemption price, together with
interest accrued and unpaid to, but not including, the redemption date (unless
the redemption date is an interest payment date, in which case accrued interest
will be paid in the ordinary course), of such Securities. Notwithstanding
anything to the contrary contained in this Article Three, the obligations of the
Company to pay the redemption price of such Securities, including all accrued
and unpaid interest, shall be deemed to be satisfied and discharged to the
extent such amount is so paid by such purchasers; provided, however, that
nothing in this Section 3.7 shall relieve the Company of its obligation to pay
the redemption price, plus accrued and unpaid interest to but excluding the
relevant redemption date (unless the redemption date is an interest payment
date, in which case the accrued interest will be paid in the ordinary course) on
Securities called for redemption. If such an agreement with one or more
investment banks or other purchasers is entered into any Securities called for
redemption and not surrendered for conversion by the Holders thereof prior to
the relevant redemption date may, at the option of the Company upon written
notice to the Trustee, 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 Ten) surrendered by such purchasers for
conversion, all as of 11:00 a.m., New York City time, on the

                                      21

<PAGE>

redemption date, subject to payment of the above amount as aforesaid. The Paying
Agent shall hold and pay to the Holders whose Securities are selected for
redemption any such amount paid to it for purchase in the same manner as it
would money deposited with it by the Company for the redemption of Securities.
Without the Paying Agent'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 Paying Agent as set forth in this Indenture, and the
Company agrees to indemnify the Paying Agent 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, including the costs and expenses incurred by the
Paying Agent 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.

SECTION 3.8       Repurchase at Option of Holder upon a Change in Control.
                  -------------------------------------------------------

           (a)    If there shall occur a Change in Control, then each Holder
shall have the right, at such Holder's option, to require the Company to
repurchase all of such Holder's Securities, or any portion thereof (in principal
amounts of $1,000 or integral multiples thereof), on the date (the "Repurchase
Date") that is fixed by the Company not more than sixty (60) days after the date
of such Change in Control. Except as set forth in this Section 3.8, such
repurchase shall be made in cash at a price equal to 100% of the principal
amount of Securities such Holder elects to require the Company to repurchase,
together with accrued interest, if any, to but excluding the Repurchase Date
(the "Repurchase Price"); provided, however, that if such Repurchase Date is an
interest payment date, then the interest payable on such date shall be paid to
the Holder of record of the Security on the preceding record date for the
payment of interest.

           Subject to the fulfillment by the Company of the conditions set forth
in Section 3.8(k), the Company may elect to pay the Repurchase Price (to the
extent not paid in cash) by delivering the number of shares of Common Stock
equal to (i) the Repurchase Price (to the extent not paid in cash) divided by
(ii) 95% of the average of the Closing Prices per share of the Common Stock for
the five consecutive Trading Days immediately preceding and including the third
Trading Day preceding the Repurchase Date.

           (b)    Unless the Company shall have theretofore called for
redemption all of the outstanding Securities, on or before the thirtieth (30th)
day after the occurrence of a Change in Control, the Company or, at the written
request of the Company, the Trustee shall mail to all holders of record of the
Securities a notice (the "Company Notice") in the form prepared by the Company
of the occurrence of the Change in Control and of the repurchase right set forth
herein arising as a result thereof. The Company shall also deliver a copy of
such Company Notice to the Trustee. The Company Notice shall contain the
following information:

           (1)    the Repurchase Date;

           (2)    the date by which the repurchase right must be exercised;

                                      22

<PAGE>

           (3)    the last date by which the election to require repurchase, if
     submitted, must be revoked;

           (4)    the Repurchase Price and whether the Repurchase Price shall be
     payable in cash or Common Stock or a combination thereof, and if payable in
     a combination thereof, the proportion of cash and Common Stock, and, if
     payable in Common Stock, the method of calculating the amount of the Common
     Stock to be delivered upon the repurchase as provided in Section 3.8(k);

           (5)    a description of the procedure that a Holder must follow to
     exercise a repurchase right;

           (6)    the Conversion Price then in effect, the date on which the
     right to convert the principal amount of the Securities to be repurchased
     will terminate and the place or places where Securities may be surrendered
     for conversion; and

           (7)    the CUSIP numbers of the Securities.

           No failure of the Company to give the foregoing notices or defect
therein shall limit any Holder's right to exercise a repurchase right or affect
the validity of the proceedings for the repurchase of Securities.

           If any of the foregoing provisions are inconsistent with applicable
law, such law shall govern.

           (c)    To exercise a repurchase right, a Holder shall deliver to the
Trustee on or before the close of business on the third Business Day preceding
the Repurchase Date (i) written notice to the Company (or agent designated by
the Company for such purpose) of the Holder's exercise of such right, which
notice shall set forth the name of the Holder, the principal amount of the
Securities to be repurchased, a statement that an election to exercise the
repurchase right is being made thereby, and, in the event that the Repurchase
Price shall be paid in whole or in part in shares of Common Stock, the name or
names (with addresses) in which the certificate or certificates for shares of
Common Stock shall be issued, and (ii) the Securities with respect to which the
repurchase right is being exercised, duly endorsed for transfer to the Company.
Election of repurchase by a Holder shall be revocable at any time prior to, but
excluding, the Second Business Day prior to the Repurchase Date, by delivering
written notice to that effect to the Trustee prior to the close of business on
the second Business Day prior to the Repurchase Date.

           (d)    If the Company fails to repurchase on the Repurchase Date any
Securities (or portions thereof) as to which the repurchase right has been
properly exercised, then the principal of such Securities shall, until paid,
bear interest to the extent permitted by applicable law from the Repurchase Date
at the rate borne by the Securities and each such Security shall be convertible
into Common Stock in accordance with this Indenture until the principal of such
Security shall have been paid or duly provided for.

           (e)    Any Security that is to be repurchased only in part shall be
surrendered to the Trustee duly endorsed for transfer to the Company and
accompanied by appropriate evidence

                                      23

<PAGE>

of genuineness and authority 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,
containing identical terms and conditions, of any authorized denomination as
requested by such Holder in aggregate principal amount equal to and in exchange
for the unrepurchased portion of the principal of the Security so surrendered.

           (f)    On or prior to the Repurchase Date, the Company shall deposit
with the Trustee or with a Paying Agent, pursuant to Section 2.14, the
Repurchase Price in cash, Common Stock, or a combination thereof, if permitted
hereunder, for payment to the Holders on the Repurchase Date; provided that if
payment is to be paid in whole or in part in cash and such cash payment is made
on the Repurchase Date it must be received by the Trustee or Paying Agent, as
the case may be, by 11:00 a.m., New York City time, on such date; provided,
further, that if the Repurchase Price is to be paid in whole or in part in
shares of Common Stock, such shares of Common Stock are to be paid as promptly
after the Repurchase Date as practicable.

           (g)    Any issuance of shares of Common Stock in respect of the
Repurchase Price shall be deemed to have been effected immediately prior to the
close of business on the Repurchase 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 repurchase shall be deemed to have become on the Repurchase
Date the holder or holders of record of the shares represented thereby;
provided, however, that any surrender for repurchase 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 repurchase of any Security
declared prior to the Repurchase Date.

           (h)    No fractions of shares shall be issued upon repurchase of
Securities. If more than one Security shall be repurchased from the same Holder
and the Repurchase Price shall be payable in shares of Common Stock, the number
of full shares which shall be issuable upon such repurchase shall be computed on
the basis of the aggregate principal amount of the Securities so repurchased.
Instead of any fractional share of Common Stock otherwise issuable on the
repurchase of any Security or Securities, 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 current market price of a full share by the fraction, and
rounding the result to the nearest cent. For purposes of this Section, the
current market price of a share of Common Stock is the Closing Price of the
Common Stock on the Trading Day immediately preceding the Repurchase Date.

           (i)    Any issuance and delivery of certificates for shares of Common
Stock on repurchase of Securities shall be made without charge to the Holder of
Securities being repurchased for such certificates or for any tax or duty in
respect of the issuance or delivery of such certificates or the securities
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

                                      24

<PAGE>

Common Stock in a name other than that of the Holder of the Securities being
repurchased, 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.

           (j)    All Securities delivered for repurchase shall be delivered to
the Trustee to be canceled in accordance with the provisions of Section 2.11.

           (k)    The Company may elect to pay the Repurchase Price by delivery
of shares of Common Stock if and only if the following conditions shall have
been satisfied:

           (i)    such shares have been registered under the Securities Act or
     are freely transferable without such registration;

           (ii)   the issuance of such Common Stock does not require
     registration or qualification with or approval of any governmental
     authority under any State law or any other federal law, which registration
     or qualification or approval has not been made or obtained;

           (iii)  such shares have been approved for quotation on the Nasdaq
     National Market or listing on a national securities exchange; and

           (iv)   such shares will be issued out of the Company's authorized but
     unissued Common Stock and, upon issuance, will be duly and validly and
     fully paid and non-assessable and free of any preemptive rights.

     (l)   For purposes of this Section 3.8:

           (i)    the term "beneficial owner" shall be determined in accordance
     with Rule 13d-3 and 13d-5, as in effect on the date of the original
     execution of this Indenture, promulgated by the SEC pursuant to the
     Exchange Act;

           (ii)    the term "Person" or "group" shall include any syndicate or
     group which would be deemed to be a "person" under Section 13(d) and 14(d)
     of the Exchange Act as in effect on the date of this Indenture;

           (iii)   a "Change in Control" shall be deemed to have occurred when
     (i) any "Person" or "group" is or becomes the "beneficial owner" of shares
     representing more than 50% of the combined voting power of the then
     outstanding securities entitled to vote generally in elections of directors
     of the Company (the "Voting Stock"); (ii) the Company consolidates with or
     merges into any other Person or any other Person merges into the Company or
     the Company conveys, transfers or leases all or substantially all of its
     assets to any Person other than a Subsidiary or Subsidiaries, and as a
     result, the outstanding Common Stock of the Company is changed or exchanged
     into other assets or securities, unless the shareholders of the Company
     immediately before such transaction own, directly or indirectly,
     immediately following such transaction, more than 50% of the combined
     voting power of the outstanding voting securities of the Person resulting
     from such transaction or the transferee Person; or (iii) there shall occur
     the liquidation or

                                      25

<PAGE>

     dissolution of the Company; provided that a Change in Control shall not be
     deemed to have occurred if either (x) the Closing Price of the Common Stock
     for any five (5) Trading Days within (a) the period of ten (10) consecutive
     Trading Days immediately after the later of the Change in Control or the
     public announcement of the Change in Control, in the case of a Change in
     Control resulting solely from a Change in Control under (i) or (ii) above,
     or (b) the period of ten (10) consecutive Trading Days immediately
     preceding the Change in Control, in the case of a Change in Control under
     (iii) above, in each such case, is at least equal to 105% of the Conversion
     Price in effect on the date on which the Change in Control occurs or (y) in
     the case of a merger or consolidation otherwise constituting a Change in
     Control, all of the consideration (excluding cash payments for fractional
     shares) in such merger or consolidation constituting the Change in Control
     consists of common stock traded on a United States national securities
     exchange or quoted on the Nasdaq National Market (or which will be so
     traded or quoted when issued or exchanged in connection with such Change in
     Control) and as a result of such transaction or transactions the Securities
     become convertible solely into such common stock.

           The Company may arrange for a third party to make the offer to
repurchase the Securities upon a Change in Control in the manner and otherwise
in compliance with the requirements of this Section 3.8. The Company shall not
be required to make the offer to repurchase the Securities upon a Change in
Control if such third party (i) makes the offer to repurchase the Securities in
the manner and at the time and otherwise in compliance with the terms of this
Section 3.8, and (ii) purchases all Securities validly tendered and not
withdrawn under such offer.

                                  ARTICLE FOUR

                                    COVENANTS

SECTION 4.1       Payment of Securities.
                  ---------------------

           The Company shall pay the principal amount, premium, if any, of and
any accrued and unpaid interest on the Securities on the dates and in the manner
provided in the Securities. The principal, premium, if any, and any accrued and
unpaid interest thereon shall be considered paid on the date due if the Paying
Agent holds (or, if the Company is acting as Paying Agent, if the Company has
segregated and holds in trust in accordance with Section 2.4) by 11:00 a.m., New
York City time, on that date money sufficient to pay the principal, premium, if
any, and any accrued and unpaid interest thereon.

           The Company shall pay interest on any overdue principal at the rate
borne by the Securities. The Company shall pay interest on overdue installments
of interest at the same rate to the extent not prohibited by applicable law.

SECTION 4.2       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 surrendered for
registration of transfer or exchange

                                      26

<PAGE>

or 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.

           The Company may also from time to time designate one or more other
offices or agencies 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.

           The Company hereby designates the Corporate Trust Office of the
Trustee as an agency of the Company in accordance with Section 2.3.

SECTION 4.3       Reports to Holders.
                  ------------------

           (a)    The Company (at its own expense) will deliver or otherwise
make available to the Trustee within 15 days after the filing of the same with
the SEC, copies of the quarterly and annual reports and of the information,
documents and other reports, if any, the Company is required to file with the
SEC pursuant to Section 13 or 15(d) of the Exchange Act.

           (b)    Notwithstanding that the Company may not be subject to the
reporting requirements of Section 13 or 15(d) of the Exchange Act, the Company
will promptly provide the information required by Rule 144A(d)(4) to any Holder
that so requests.

           (c)    In addition, if and when this Indenture becomes subject to the
TIA, the Company will file a copy of all such information with the SEC for
public availability (unless the Commission will not accept such a filing) and
make such information available to investors who request it in writing. The
Company will also comply with the other provisions of TIA [sec]. 314(a).

           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).

SECTION 4.4       Compliance Certificate.
                  ----------------------

                  The Company shall deliver to the Trustee within 120 days after
the end of each fiscal year of the Company an Officers' Certificate stating
whether or not the signers know of any Default or Event of Default by the
Company in performing any of its obligations under this Indenture or the
Securities. If they do know of any such Default or Event of Default, the
certificate shall describe the Default or Event of Default and its status.

                                      27

<PAGE>

SECTION 4.5       Stay, Extension and Usury Laws.
                  ------------------------------

           The Company covenants (to the extent that it may lawfully do so) that
it will not at any time insist upon, plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay, extension or usury 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, by resort to any such law, 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 has been
enacted.

SECTION 4.6       Corporate Existence.
                  -------------------

           Subject to Article Five, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its corporate
existence and the corporate existence of each Subsidiary in accordance with the
respective organizational documents of each Subsidiary and the rights (charter
and statutory), licenses and franchises of the Company and its Subsidiaries;
provided, however, that the Company shall not be required to preserve any such
right, license or franchise, or the corporate existence of any Subsidiary, if in
the judgment of the Company, (i) such preservation or existence is not material
to the conduct of business of the Company and (ii) the loss of such right,
license or franchise or the dissolution of such Subsidiary does not have a
material adverse impact on the Holders.

SECTION 4.7       Notice of Default.
                  -----------------

           In the event that any Default under Section 6.1 hereof shall occur,
the Company will give prompt written notice of such Default to the Trustee.

                                  ARTICLE FIVE

                    CONSOLIDATION, MERGER AND SALE OF ASSETS

SECTION 5.1       When Company May Merge, etc.
                  ---------------------------

           The Company shall not consolidate with or merge into any other
Person, in a transaction in which the Company is not the surviving corporation,
or convey, transfer or lease its properties and assets substantially as an
entirety to, another Person, unless (i) the successor, if any, is a corporation
organized under the laws of the United States or any State thereof or the
District of Columbia; (ii) the successor assumes by supplemental indenture the
Company's obligations under the Securities and this Indenture; and (iii)
immediately after giving effect to the transaction, no Default or Event of
Default shall have occurred and be continuing.

           The Company shall deliver to the Trustee prior to the consummation of
the proposed transaction an Officers' Certificate to the foregoing effect and an
Opinion of Counsel stating that the proposed transaction and such supplemental
indenture will, upon consummation of the proposed transaction, comply with this
Indenture.

                                      28

<PAGE>

           The foregoing shall not prohibit any of the Subsidiaries from merging
with or into the Company or a merger effected solely for the purposes of
reincorporating the Company in another jurisdiction.

SECTION 5.2       Successor Substituted.
                  ---------------------

           Upon any consolidation or merger or transfer or lease of all or
substantially all of the assets of the Company in accordance with Section 5.1,
the successor Person formed by such consolidation or into which the Company is
merged or to which such transfer or lease is made shall succeed to, and be
substituted for, and may exercise every right and power of, and shall assume
every duty and obligation of, the Company under this Indenture with the same
effect as if such successor corporation had been named as the Company herein.
Except in the case of a lease, if the predecessor Person is still in existence
after the transaction, it will be released from its obligations and covenants
under this Indenture and the Securities.

                                  ARTICLE SIX

                              DEFAULTS AND REMEDIES

SECTION 6.1       Events of Default.
                  -----------------

           An "Event of Default" occurs if:

           (1)    the Company fails to pay the principal of or any premium on
the Securities when due (whether or not prohibited by the provisions set forth
in Article Twelve hereof);

           (2)    the Company fails to pay any interest on the Securities when
due, if such failure continues for 30 days (whether or not prohibited by the
provisions set forth in Article Twelve hereof); provided that a failure to make
any of the first six scheduled interest payments on the Securities within three
(3) Business Days after the applicable interest payment dates will constitute an
Event of Default with no additional grace or cure period;

           (3)    the Company fails to perform any other covenant in this
Indenture, if such failure continues for 60 days after receipt of the notice
specified in the last paragraph of this Section 6.1;

           (4)    any Indebtedness for money borrowed by the Company or any of
its Significant Subsidiaries in an outstanding principal amount in excess of
$20,000,000, is not paid at final maturity or upon acceleration, and such
Indebtedness is not discharged, or such default on payment or acceleration is
not cured, waived or rescinded within 30 days after receipt of the notice
specified in the last paragraph of this Section 6.1;

           (5)    the Company or any of its Significant Subsidiaries pursuant to
or within the meaning of any Bankruptcy Law:

                  (A)    commences a voluntary case,

                                      29

<PAGE>

                  (B)    consents to the entry of an order for relief against
     it in an involuntary case,

                  (C)    consents to the appointment of a Custodian of it or
     for all or substantially all of its property, or

                  (D)    makes a general assignment for the benefit of its
     creditors;

           (6)    a court of competent jurisdiction enters an order or decree
under any Bankruptcy Law that:

                  (A)    is for relief against the Company or any of its
     Significant Subsidiaries in an involuntary case,

                  (B)    appoints a Custodian of the Company or any of its
     Significant Subsidiaries for all or substantially all of its property, or

                  (C)    orders the liquidation of the Company or any of its
     Significant Subsidiaries,

     and the order or decree remains unstayed and in effect for 60 consecutive
     days; or

           (7)    the Pledge Agreement shall cease to be in full force and
effect or enforceable in accordance with its terms.

           The term "Bankruptcy Law" means Title 11, U.S. Code or any similar
Federal or State law for the relief of debtors. The term "Custodian" means any
receiver trustee, assignee, liquidator or similar official under any Bankruptcy
Law.

           A Default under clause (3) or (4) is not an Event of Default until
the Trustee notifies the Company in writing, or the Holders of at least 25% in
aggregate principal amount of the Securities then outstanding notify the Company
and the Trustee of the default and the Company does not cure the Default (and
such Default is not waived) within the time periods specified in clause (3) or
(4) above. The notice must specify the Default, demand that it be remedied and
state that the notice is a "Notice of Default." If the Holders of 25% in
aggregate principal amount of the outstanding Securities request the Trustee to
give such notice on their behalf, the Trustee shall do so. When a Default is
cured, it ceases.

SECTION 6.2       Acceleration.
                  ------------

           If an Event of Default (other than an Event of Default specified in
Section 6.1(5) or (6)) occurs and is continuing, the Trustee by notice to the
Company, or the Holders of at least 25% in principal amount of the Securities
then outstanding by notice to the Company and the Trustee, may declare the
principal amount including any accrued and unpaid interest on the Securities
immediately due and payable. If an Event of Default under Section 6.1(5) or (6)
occurs, the principal amount of all the Securities will automatically become
immediately due and payable without any declaration or other act on the part of
the Trustee or any Holder.

                                      30

<PAGE>

           The Company shall promptly notify holders of Designated Senior
Indebtedness if payment of the Securities is accelerated because of an Event of
Default.

           After a declaration of acceleration, but before a judgment or decree
of the money due in respect of the Securities has been obtained, the Holders of
not less than a majority in aggregate principal amount of the Securities then
outstanding by written notice to the Trustee may rescind an acceleration and its
consequences if (i) all existing Events of Default (other than the nonpayment of
principal of and interest on the Securities which has become due solely by
virtue of such acceleration) have been cured or waived, (ii) the rescission
would not conflict with any judgment or decree and (iii) the Company shall have
paid all amounts due pursuant to Section 7.7.

SECTION 6.3       Other Remedies.
                  --------------

           Notwithstanding any other provision of this Indenture, if an Event of
Default occurs and is continuing, the Trustee may pursue any available remedy by
proceeding at law or in equity to collect the payment of the principal of,
premium, if any, and interest on the Securities or to enforce the performance of
any provision of the Securities or this Indenture.

           The Trustee may maintain a proceeding even if it does not possess any
of the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder in exercising any right or remedy accruing
upon an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. All remedies are cumulative.

SECTION 6.4       Waiver of Past Defaults.
                  -----------------------

           Subject to Sections 6.2, 6.7 and 9.2, the Holders of a majority in
aggregate principal amount of the Securities then outstanding by notice to the
Trustee may waive any past Default or Event of Default and its consequences,
except a Default or Event of Default in the payment of the principal of or
interest on any Security or any Default or Event of Default in respect of any
provision of this Indenture or the Securities that, under Section 9.2, cannot be
modified or amended without the consent of the Holder of each Security affected.
When a Default or an Event of Default is waived, it is cured and ceases.

SECTION 6.5       Control by Majority.
                  -------------------

           The Holders of a majority in aggregate principal amount of the
Securities then outstanding may 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 it. However, the Trustee may refuse to follow any
direction that conflicts with law or this Indenture, is unduly prejudicial to
the rights of other Holders or would involve the Trustee in personal liability
if the Trustee shall have reasonable grounds for believing that adequate
indemnity against such liability is not reasonably assured to it; provided that
the Trustee may take any other action deemed proper by the Trustee which is not
inconsistent with such direction.

                                      31

<PAGE>

SECTION 6.6       Limitation on Suits.
                  -------------------

           Except as provided in Section 6.7, a Holder may pursue a remedy with
respect to this Indenture or the Securities only if:

           (1)    the Holder gives to the Trustee written notice of a continuing
     Event of Default;

           (2)    the Holders of at least 25% in aggregate principal amount of
     the Securities then outstanding make a written request to the Trustee to
     pursue the remedy;

           (3)    such Holder or Holders offer to the Trustee indemnity
     satisfactory to the Trustee against any loss, liability or expense;

           (4)    the Trustee does not comply with the request within 60 days
     after receipt of the request and the offer of indemnity; and

           (5)    during such 60-day period the Holders of a majority in
     aggregate principal amount of the Securities then outstanding do not give
     the Trustee a direction inconsistent with the request.

           A Holder may not use this Indenture to prejudice the rights of
another Holder or to obtain a preference or priority over another Holder.

SECTION 6.7       Rights of Holders to Receive Payment or Convert.
                  -----------------------------------------------

           Notwithstanding any other provision of this Indenture, (i) the right
of any Holder to receive payment of the principal of and interest on the
Security, on or after the respective due dates expressed in the Security, or to
bring suit for the enforcement of any such payment on or after such respective
dates, shall not be impaired or affected without the consent of the Holder and
(ii) the right of any Holder to bring suit for the enforcement of the right to
convert the Security shall not be impaired or affected without the consent of
the Holder.

SECTION 6.8       Collection Suit by Trustee.
                  --------------------------

           If an Event of Default specified in Section 6.1(l) or (2) occurs and
is continuing, the Trustee may recover judgment in its own name and as trustee
of an express trust against the Company for the whole amount of principal and
interest remaining unpaid and amounts due to the Trustee under Section 7.7.

SECTION 6.9       Trustee May File Proofs of Claim.
                  --------------------------------

           The Trustee may file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee, any predecessor Trustee and the Holders allowed in any judicial
proceedings relative to the Company, its creditors or its property.

                                      32

<PAGE>

           Nothing herein contained 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.

SECTION 6.10      Priorities.
                  ----------

           If the Trustee collects any money pursuant to this Article, it shall
     pay out the money in the following order:

           First: to the Trustee for amounts due under Section 7.7;

           Second: to holders of Senior Indebtedness to the extent required by
     Article Twelve;

           Third: to Holders for amounts due and unpaid on the Securities for
     principal of, premium, if any, and interest, ratably, without preference or
     priority of any kind, according to the amounts due and payable on the
     Securities for principal, premium, if any, and interest, respectively, and

           Fourth: to the Company.

           The Trustee, upon prior written notice to the Company, may fix a
record date and payment date for any payment by it to Holders pursuant to this
Section 6.10.

SECTION 6.11      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 or omitted by
it as Trustee, a court in its discretion may require the filing by any party
litigant in the suit other than the Trustee of an undertaking to pay the costs
of the suit, and the court in its discretion may assess reasonable costs,
including reasonable attorneys' fees and expenses, against any party litigant in
the suit, having due regard to the merits and good faith of the claims or
defenses made by the party litigant. This Section 6.11 shall not apply to a suit
by the Trustee, a suit by a Holder or group of Holders of more than 10% in
aggregate principal amount of the outstanding Securities, or to any suit
instituted by any Holder for the enforcement or the payment of the principal or
interest on any Securities on or after the respective due dates for such
Securities.

                                 ARTICLE SEVEN

                                     TRUSTEE

SECTION 7.1       Duties of Trustee.
                  -----------------

           (a)    If 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 its exercise, as a
prudent person would exercise or use under the circumstances in the conduct of
his or her own affairs.

                                      33

<PAGE>

           (b)    Except during the continuance of an Event of Default:

           (1)    the Trustee need perform only those duties that are
     specifically set forth in this Indenture and no others shall be inferred or
     implied; 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
     examine the certificates and opinions to determine whether or not they
     conform to the requirements of this Indenture (but need not confirm or
     investigate the accuracy of any mathematical calculations or other facts
     stated therein).

           (c)    The Trustee may not be relieved from liability for its own
negligent action, its own negligent failure to act or its own willful
misconduct, except that:

           (1)    this paragraph does not limit the effect of paragraph (b) of
     this Section 7.1;

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

           (3)    the Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 6.5.

           (d)    The Trustee may refuse to perform any duty or exercise any
right or power unless it receives indemnity satisfactory to it against any loss,
liability or expense.

           (e)    The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Company.
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by law.

SECTION 7.2       Rights of Trustee.
                  -----------------

           (a)    The Trustee may conclusively rely on any document believed by
it to be genuine and to have been signed or presented by the proper person. The
Trustee need not investigate any fact or matter stated in the document; if,
however, 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 expense of the Company
and shall incur no liability or additional liability of any kind by reason of
such inquiry or investigation.

           (b)    Before the Trustee acts or refrains from acting, it may
require an Officers' Certificate and/or an Opinion of Counsel. The Trustee shall
not be liable for any action it takes or omits to take in good faith in reliance
on such Officers' Certificate or Opinion of Counsel.

                                      34

<PAGE>

           (c)    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.

           (d)    The Trustee may consult with counsel appointed with due care
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 may act through agents or attorneys and shall not
be responsible for the misconduct or negligence of any agent or attorney
appointed with due care.

           (f)    The Trustee shall not be liable for any action it takes or
omits to take in good faith which it believes to be authorized or within its
discretion, rights or powers hereunder.

           (g)    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 may, in absence of bad
faith on its part, rely upon an Officers' Certificate.

           (h)    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, unless such Holders shall have offered to the Trustee
reasonable security or indemnity satisfactory to it against costs, expenses and
liabilities that might be incurred by it in compliance with such request or
direction.

           (i)    The Trustee shall not be charged with knowledge of any Default
or Event of Default with respect to the Securities unless either (1) a Trust
Officer shall have actual knowledge of such Default or Event of Default or (2)
written notice of such Default or Event of Default shall have been given to the
Trustee by the Company or by any Holder.

           (j)    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 unless security or indemnity satisfactory to the Trustee
against the costs, expenses and liability which might be incurred by it in
compliance with such performance has been offered.

           (k)    The rights, privileges, protections, immunities and benefits
given to the Trustee, including, without limitation, its right to be
indemnified, are extended to, and shall be enforceable by, the Trustee in each
of its capacities hereunder, and each agent, custodian and other Person employed
to act hereunder.

SECTION 7.3       Individual Rights of Trustee.
                  ----------------------------

           The Trustee in its individual or any other capacity may become the
owner or pledgee of Securities and may otherwise deal with the Company or an
Affiliate thereof with the same rights it would have if it were not Trustee. Any
Agent may do the same with like rights. The Trustee, however, must comply with
Sections 7.10 and 7.11.

                                      35

<PAGE>

SECTION 7.4       Trustee's Disclaimer.
                  --------------------

           The Trustee makes no representation as to the validity or adequacy of
this Indenture or the Securities; it shall not be accountable for the Company's
use of the proceeds from the Securities; and it shall not be responsible for any
statement in the Securities other than its certificate of authentication.

SECTION 7.5       Notice of Defaults.
                  ------------------

           If a Default or Event of Default occurs and is continuing and if it
is actually known to a Trust Officer of the Trustee, the Trustee shall mail to
each Holder a notice of the Default or Event of Default within 60 days after it
occurs unless such Default or Event of Default has been cured or waived. Except
in the case of a Default or Event of Default in payment of the principal of,
premium, if any, and interest on any Security, the Trustee may withhold the
notice if and so long as it in good faith determines that withholding the notice
is in the best interests of Holders.

SECTION 7.6       Reports by Trustee to Holders.
                  -----------------------------

           Within 60 days after each May 15 beginning with May 15, 2003,
the Trustee shall mail to each Holder, to the extent required by TIA [sec].
313(c), a brief report dated as of such reporting date that complies with TIA
[sec]. 313(a). In such event, the Trustee also shall comply with TIA [sec].
313(b).

           A copy of each report at the time of its mailing to Holders shall be
mailed to the Company and filed by the Trustee with the SEC and each stock
exchange, if any, on which the Securities are listed. The Company shall promptly
notify the Trustee when the Securities are listed on any stock exchange or
delisted therefrom.

SECTION 7.7       Compensation and Indemnity.
                  --------------------------

           The Company shall pay to the Trustee from time to time such
compensation for its services as shall be agreed upon in writing from time to
time. The Trustee's compensation shall not be limited by any law on compensation
of a trustee of an express trust. The Company shall reimburse the Trustee upon
request for all out-of-pocket expenses incurred by it. Such expenses shall
include the reasonable compensation and out-of-pocket expenses of the Trustee's
agents and counsel.

           The Company shall fully indemnify the Trustee against any and all
loss, claim, damage or liability or expense (including the reasonable fees and
expenses of counsel) incurred by it in connection with the acceptance or
administration of this trust and the performance of its duties hereunder,
including the costs and expenses of defending itself against any claim or
liability in connection with the exercise or performance of any of its powers
and duties hereunder. The Company need not pay for any settlement made without
its consent which shall not be unreasonably withheld. The Trustee shall notify
the Company promptly of any claim for which it may seek indemnification. The
Company need not reimburse any expense or indemnify against any loss or
liability determined by a court of competent jurisdiction to have been caused by
the Trustee's own negligence or bad faith.

                                      36

<PAGE>

           To secure the Company's payment obligations in this Section 7.7, the
Trustee shall have a lien prior to the Securities on all money or property held
or collected by the Trustee, except that held in trust to pay the principal of,
premium, if any, and interest on particular Securities.

           The indemnity obligations of the Company with respect to the Trustee
provided for in this Section 7.7 shall survive any resignation or removal of the
Trustee and the termination of this Indenture.

           When the Trustee incurs expenses or renders services after an Event
of Default specified in Section 6.1(5) or (6) occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

SECTION 7.8       Replacement of Trustee.
                  ----------------------

           A resignation or removal of the Trustee and appointment of a
successor Trustee shall become effective only upon the successor Trustee's
acceptance of appointment as provided in this Section 7.8.

           The Trustee may resign by so notifying the Company in writing 30 days
prior to such resignation. The Holders of a majority in aggregate principal
amount of the Securities then outstanding may remove the Trustee by so notifying
the Trustee and the Company in writing and may appoint a successor Trustee with
the Company's consent. The Company may remove the Trustee if:

           (1)    the Trustee fails to comply with Section 7.10;

           (2)    the Trustee is adjudged a bankrupt or an insolvent;

           (3)    a receiver or other public officer takes charge of the Trustee
     or its property; or

           (4)    the Trustee becomes incapable of acting.

           If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. Within one year after the successor Trustee takes office, the Holders
of a majority in aggregate principal amount of the Securities then outstanding
may appoint a successor Trustee to replace the successor Trustee appointed by
the Company.

           If a successor Trustee does not take office within 30 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of at least 10% in aggregate principal amount of the outstanding
Securities may petition at the expense of the Company any court of competent
jurisdiction for the appointment of a successor Trustee.

           If the Trustee fails to comply with Section 7.10, any Holder may
petition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

                                      37

<PAGE>

           A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Thereupon the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders. The retiring Trustee shall upon payment of all amounts
due it hereunder promptly transfer all property held by it as Trustee to the
successor Trustee, subject to the lien provided for in Section 7.7.

SECTION 7.9       Successor Trustee by Merger, etc.
                  --------------------------------

           If the Trustee consolidates with, merges or converts into, or
transfers all or substantially all of its corporate trust business to, another
corporation, the successor corporation without any further act shall be the
successor Trustee, if such successor corporation is otherwise eligible
hereunder.

SECTION 7.10      Eligibility; Disqualification.
                  -----------------------------

           This Indenture shall always have a Trustee who satisfies the
requirements of TIA [sec] 310(a)(1). The Trustee shall always have a combined
capital and surplus of at least $50,000,000 as set forth in its most recent
published annual report of condition. The Trustee shall comply with TIA [sec]
310(b).

SECTION 7.11      Preferential Collection of Claims Against Company.
                  -------------------------------------------------

           The Trustee shall comply with TIA [sec] 311(a), excluding any
creditor relationship listed in TIA [sec] 311(b). A Trustee who has resigned or
been removed shall be subject to TIA [sec] 311(a) to the extent indicated.

                                 ARTICLE EIGHT

                           SATISFACTION AND DISCHARGE

SECTION 8.1       Termination of Company's Obligations.
                  ------------------------------------

           This Indenture shall 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 except as further provided below),
and the Trustee, on demand of and at the expense of the Company, shall execute
proper instruments acknowledging satisfaction and discharge of this Indenture,
when

           (1)    either

                  (i)     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 2.7 and (ii)
     Securities for whose payment money has theretofore been deposited in trust
     and thereafter repaid to the Company as provided in Section 8.3) have been
     delivered to the Trustee for cancellation; or

                                      38

<PAGE>

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

                          (a)     have become due and payable, or

                          (b)     will become due and payable at the final
           maturity date within one year; or

                          (c)     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 clause (a), (b) or (c)
           above, has irrevocably deposited or caused to be irrevocably
           deposited with the Trustee or a Paying Agent (other than the Company
           or any of its Affiliates) as trust funds in trust for the purpose
           cash 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 interest to the date of
           such deposit (in the case of Securities which have become due and
           payable) or to the Maturity Date 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; and

           (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.

           Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 7.7 shall survive and,
if money shall have been deposited with the Trustee pursuant to clause (1) of
this Section, the provisions of Sections 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2,10,
2.12, 2.13, 2.16, 3.6, 3.8, 4.2, 7.1, 7.2, 7.3, 7.4, 8.3, 8.4, Article Ten, the
last paragraph of Section 4.3 and this Article Eight, shall survive until the
Securities have been paid in full. Thereafter, the Company's obligations in
Sections 7.7, 8.3 and 8.4 shall survive such satisfaction and discharge.

SECTION 8.2       Application of Trust Money.
                  --------------------------

           Subject to the provisions of Section 8.3, the Trustee or a Paying
Agent shall hold in trust money deposited with it. It shall apply the deposited
money in accordance with this Indenture to the payment of the principal of,
premium, if any, and interest on the Securities. Money so held in trust is not
subject to the subordination provisions of Article Twelve.

SECTION 8.3       Repayment to Company.
                  --------------------

           The Trustee and the Paying Agent shall promptly pay to the Company
upon request any excess money or securities held by them at any time. The
Trustee and the Paying Agent shall pay to the Company upon request any money
held by them for the payment of the

                                      39

<PAGE>

principal, premium, if any, and interest that remains unclaimed for two years;
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
mailed to each Holder, notice stating that such money remains and that, after a
date specified therein, which shall not be less than 30 days from the date of
such mailing, any unclaimed balance of such money then remaining will be repaid
to the Company. After payment to the Company, Holders entitled to money must
look to the Company for payment as general creditors unless an applicable
abandoned property law designates another Person.

SECTION 8.4       Reinstatement.
                  -------------

           If the Trustee or Paying Agent is unable to apply any money in
accordance with Section 8.1 by reason of any legal proceeding or by reason of
any order or judgment of any court or governmental authority enjoining,
restraining or otherwise prohibiting such application, the Company's obligations
under this Indenture and the Securities shall be revived and reinstated as
though no deposit had occurred pursuant to Section 8.1 until such time as the
Trustee or Paying Agent is permitted to apply all such money in accordance with
Section 8.1; provided, however, that to the extent the Company makes any payment
of the principal of, premium, if any, and interest on any Securities because of
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 Paying Agent.

                                  ARTICLE NINE

                                   AMENDMENTS

SECTION 9.1       Without Consent of Holders.
                  --------------------------

           Without the consent of the Holders of the Securities, the Company,
when authorized by a Board Resolution, and the Trustee may enter into one or
more supplemental indentures for any of the following purposes:

           (1)    to cure any ambiguity, omission, defect or inconsistency;

           (2)    to provide for uncertificated Securities in addition to or in
     place of certificated Securities;

           (3)    to comply with Sections 5.1 and 10.7;

           (4)    to reduce the Conversion Price;

           (5)    to make any change that would provide any additional rights or
     benefits to the Holder of the Securities or that does not adversely affect
     the legal rights under this Indenture of any such Holder; or

           (6)    to comply with the requirements of the Commission in order to
     maintain the qualification of this Indenture under the TIA.

                                      40

<PAGE>

SECTION 9.2       With Consent of Holders.
                  -----------------------

           The Company, when authorized by a Board Resolution, and the Trustee
may modify, amend or supplement this Indenture or the Securities without notice
to any Holder but with the written consent of the Holders of at least a majority
in aggregate principal amount of the outstanding Securities. Subject to Section
6.7, the Holders of a majority in aggregate principal amount of the outstanding
Securities may waive compliance by the Company with any provision of this
Indenture or the Securities without notice to any other Holder. However, without
the consent of each Holder affected, an amendment, supplement or waiver,
including a waiver pursuant to Section 6.4, may not:

           (1)    change the Stated Maturity or the Maturity Date of the
     Securities;

           (2)    reduce the principal of, premium, if any, or interest on the
     Securities;

           (3)    change the place of payment from New York, New York or change
     the currency in which the Securities are payable;

           (4)    impair the right to sue for payment after the Stated Maturity
     or Maturity Date pursuant to Section 6.7;

           (5)    modify the provisions of Article Twelve in an adverse manner
     to the Holders;

           (6)    adversely affect the right to convert the Securities other
     than as provided in or under this Indenture;

           (7)    change the provisions of this Section 9.2; or

           (8)    reduce the percentage in principal amount of the outstanding
     Securities necessary for a waiver of compliance with certain provisions of
     this Indenture or for waiver of certain Defaults or Events of Default
     pursuant to Section 6.4.

           Furthermore, an amendment under this Article Nine may not make any
change that adversely affects the rights of any holder of Senior Indebtedness
under Article Twelve unless the holders of such Senior Indebtedness consent to
such change pursuant to the terms governing such Senior Indebtedness.

           It shall not be necessary for the consent of the Holders under this
Section 9.2 to approve the particular form of any proposed amendment or
supplement, but it shall be sufficient if such consent approves the substance
thereof.

           Promptly after an amendment under this Section 9.2 becomes effective,
the Company shall mail to Holders a notice briefly describing the amendment.

                                      41

<PAGE>

SECTION 9.3       Compliance with Trust Indenture Act.
                  -----------------------------------

           Every amendment, waiver or supplement to this Indenture or the
Securities shall comply with the TIA as then in effect.

SECTION 9.4       Revocation and Effect of Consents.
                  ---------------------------------

           Until an amendment, supplement or waiver becomes effective, a consent
to it by a Holder is a continuing consent by the Holder and every subsequent
Holder of a Security or portion of a Security that evidences the same debt as
the consenting Holder's Security, even if notation of the consent is not made on
any Security. However, any such Holder or subsequent Holder may revoke the
consent as to its Security or portion of a Security if the Trustee receives the
notice of revocation before the date the amendment, supplement or waiver becomes
effective. An amendment, supplement or waiver becomes effective in accordance
with its terms and thereafter binds every Holder.

           After an amendment, supplement or waiver becomes effective with
respect to the Securities, it shall bind every Holder unless it makes a change
described in any of clauses (1) through (8) of Section 9.2. In that case the
amendment, supplement or waiver shall bind each Holder of a Security who has
consented to it and every subsequent Holder of a Security or portion of a
Security that evidences the same debt as the consenting Holder's Security.

SECTION 9.5       Notation on or Exchange of Securities.
                  -------------------------------------

           If an amendment, supplement or waiver changes the terms of a
Security, the Trustee may require the Holder of the Security to deliver it to
the Trustee. The Trustee may place an appropriate notation on the Security as
directed and prepared by the Company about the changed terms and return it to
the Holder. Alternatively, if the Company so determines, the Company in exchange
for the Security shall issue and the Trustee shall authenticate a new Security
that reflects the changed terms.

SECTION 9.6       Trustee Protected.
                  -----------------

           The Trustee shall sign any amendment or supplemental indenture
authorized pursuant to this Article Nine if the amendment or supplemental
indenture does not adversely affect the rights, duties, liabilities or
immunities of the Trustee. If it does, the Trustee may, in its sole discretion,
but need not sign such amendment or supplemental indenture. In signing or
refusing to sign such amendment or supplemental indenture, the Trustee shall be
entitled to receive and, subject to Section 7.1, shall be fully protected in
relying upon, an Opinion of Counsel stating that such amendment or supplemental
indenture is authorized or permitted by this Indenture.

                                      42

<PAGE>

                                  ARTICLE TEN

                                   CONVERSION

SECTION 10.1      Conversion Privilege; Restrictive Legends.
                  -----------------------------------------

           A Holder of a Security may convert the principal of such Security
into Common Stock at any time during the period stated in paragraph 9 of the
Securities. The number of shares issuable upon conversion of a Security is
determined as follows: divide each $1,000 of the principal amount to be
converted by the Conversion Price in effect on the conversion date and round the
result to the nearest 1/100th of a share. The Conversion Price is subject to
adjustment in accordance with Section 10.6.

           A Holder may convert a portion of the principal of such Security if
the portion is at least $1,000 principal amount or an integral multiple of
$1,000 principal amount. Provisions of this Indenture that apply to conversion
of all of a Security also apply to conversion of a portion of it.

           Any shares issued upon conversion of a Security shall bear the
Private Placement Legend set forth in Exhibit B(I) until after the expiration of
the holding period applicable to sales of Securities under Rule 144(k) of the
Securities Act.

SECTION 10.2      Conversion Procedure.
                  --------------------

           To convert a Security a Holder must satisfy the requirements in
paragraph 9 of the Securities. The date on which the Holder satisfies all those
requirements is the conversion date. As soon as practicable, the Company shall
deliver to the Holder through the Conversion Agent a certificate for the number
of full shares of Common Stock issuable upon the conversion and a check in lieu
of any fractional share. The Person in whose name the certificate is registered
shall be treated as a shareholder of record on and after the conversion date.

           Except as described below, no payment or adjustment will be made for
accrued interest on, or liquidated damages with respect to, a converted Security
or for dividends on any Common Stock issued on conversion. If any Security is
converted during the period from but excluding, a record date for the payment of
interest to, but excluding, the next succeeding interest payment date, unless
such Security has been called for redemption on a redemption date between such
dates, such Security must be accompanied by funds equal to the interest payable
to the registered Holder on such interest payment date on the principal amount
so converted. A Security converted on an interest payment date need not be
accompanied by any payment, and the interest on the principal amount of the
Security being converted will be paid on such interest payment date to the
registered Holder of such Security on the applicable record date.

           If a Holder converts more than one Security at the same time, the
number of full shares issuable upon the conversion shall be based on the total
principal amount of the Securities converted.

                                      43

<PAGE>

           Upon surrender of a Security that is converted in part the Trustee
shall authenticate for the Holder a new Security equal in principal amount to
the unconverted portion of the Security surrendered.

           If the last day on which a Security may be converted is a Legal
Holiday in a place where a Conversion Agent is located, the Security may be
surrendered to that Conversion Agent on the next succeeding day that is not a
Legal Holiday.

SECTION 10.3      Fractional Shares.
                  -----------------

           The Company will not issue fractional shares of Common Stock upon
conversion of Securities and instead will deliver a cash adjustment in lieu of
the fractional share based upon the current market value of the Common Stock.
The current market value of a fraction of a share is determined by multiplying
the current market price of a full share by the fraction, and rounding the
result to the nearest cent. For purposes of this Section, the current market
price of a share of Common Stock is the Closing Price of the Common Stock on the
Trading Day immediately preceding the conversion date.

SECTION 10.4      Taxes on Conversion.
                  -------------------

           If a Holder converts its Security, the Company shall pay any
documentary, stamp or similar issue or transfer tax due on the issue of shares
of Common Stock upon the conversion. However, the Holder shall pay any such tax
which is due because the shares are issued in a name other than the Holder's
name.

SECTION 10.5      Company to Provide Stock.
                  ------------------------

           The Company shall reserve out of its authorized but unissued Common
Stock or its Common Stock held in treasury enough shares of Common Stock to
permit the conversion of all of the Securities, including such greater number of
shares of Common Stock into which such Securities shall be convertible into as a
result of a Conversion Price adjustment contemplated by Section 10.6 hereof.

           All shares of Common Stock which may be issued upon conversion of the
Securities shall be validly issued, fully paid and non-assessable.

           The Company will endeavor to comply with all securities laws
regulating the offer and delivery of shares of Common Stock upon conversion of
Securities and will endeavor to list such shares on each national securities
exchange on which the Common Stock is listed.

SECTION 10.6      Adjustment of Conversion Price.
                  ------------------------------

           The Conversion Price shall be adjusted from time to time by the
Company as follows:

           (a)    In case the Company shall hereafter pay a dividend or make a
     distribution to all holders of the outstanding Common Stock in shares of
     Common Stock, the Conversion Price in effect at the opening of business on
     the date following the Record

                                      44

<PAGE>

     Date with respect to 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 Record 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 following the Record Date. If any dividend
     or distribution of the type described in this Section 10.6(a) is declared
     but not so paid or made, the Conversion Price shall again be adjusted to
     the Conversion Price which would then be in effect if such dividend or
     distribution had not been declared.

           (b)    In case the Company shall issue rights or warrants to all
     holders of its outstanding shares of Common Stock entitling them for a
     period of not more than 60 days to subscribe for or purchase shares of
     Common Stock at a price per share or a Conversion Price per share less than
     the Current Market Price on the Record Date fixed for the determination of
     shareholders entitled to receive such rights or warrants, the Conversion
     Price shall be adjusted so that the same shall equal the price determined
     by multiplying the Conversion Price in effect at the opening of business on
     the date after such Record Date by a fraction of which the numerator shall
     be the number of shares of Common Stock outstanding at the close of
     business on the Record Date plus the number of shares which the aggregate
     offering price of the total number of shares so offered for subscription or
     purchase would purchase at such Current Market Price, and of which the
     denominator shall be the number of shares of Common Stock outstanding on
     the close of business on the Record Date plus the total number of
     additional shares of Common Stock so offered for subscription or purchase.
     Such adjustment shall become effective immediately after the opening of
     business on the day following the Record Date fixed for determination of
     shareholders entitled to receive such rights or warrants. To the extent
     that shares of Common Stock are not delivered pursuant to such rights or
     warrants, upon the expiration or termination of such rights or warrants,
     the Conversion Price shall be readjusted to the Conversion Price that would
     then be in effect had the adjustments made upon the issuance of such rights
     or warrants been made on the basis of delivery of only the number of shares
     of Common Stock actually delivered. In the event that such rights or
     warrants are not so issued, the Conversion Price shall again be adjusted to
     be the Conversion Price that would then be in effect if such date fixed for
     the determination of shareholders entitled to receive such rights or
     warrants had not been fixed. In determining whether any rights or warrants
     entitle the holders to subscribe for or purchase shares of Common Stock at
     less than such Current Market Price, and in determining the aggregate
     offering price of such shares of Common Stock, there shall be taken into
     account any consideration received for such rights or warrants, the value
     of such consideration, if other than cash, to be determined in good faith
     by the Board of Directors.

           For purposes of this Section 10.6(b), rights or warrants distributed
     by the Company to all holders of Common Stock entitling the holders thereof
     to subscribe for or purchase shares of the Company's capital stock (either
     initially or under certain circumstances) that are (i) deemed to be
     transferred with such shares of Common Stock; (ii) not exercisable; and
     (iii) issued in respect of future issuances of Common Stock, until

                                      45

<PAGE>

     the occurrence of a specified event or events ("Trigger Event"), shall be
     deemed not to have been distributed and no adjustment to the Conversion
     Price with respect thereto shall be made until the occurrence of the
     earliest Trigger Event. If any such right or warrant is subject to
     subsequent events, upon the occurrence of which such right or warrant shall
     become exercisable to purchase different securities, evidences of
     indebtedness or other assets or entitle the holder to purchase a different
     number or amount of the foregoing or to purchase any of the foregoing at a
     different purchase price, then the occurrence of each such event shall be
     deemed to be the date of issuance and record date with respect to a new
     right or warrant (and a termination or expiration of the existing right or
     warrant without exercise by the holder thereof). In addition, in the event
     of any distribution (or deemed distribution) of rights or warrants, or any
     Trigger Event or other event (of the type described in the preceding
     sentence) with respect thereto, that resulted in an adjustment to the
     Conversion Price under this Section 10.6(b), (1) in the case of any such
     rights or warrants which shall all have been redeemed or repurchased
     without exercise by any holders thereof, the Conversion Price shall be
     readjusted upon such final redemption or repurchase to give effect to such
     distribution or Trigger Event, as the case may be, as though it were a cash
     distribution, equal to the per share redemption or repurchase price
     received by a holder of Common Stock with respect to such rights or
     warrants (assuming such holder had retained such rights or warrants), made
     to all holders of Common Stock as of the date of such redemption or
     repurchase, and (2) in the case of such rights or warrants all of which
     shall have expired or been terminated without exercise, the Conversion
     Price shall be readjusted as if such rights and warrants had never been
     issued.

           (c)    In case the outstanding shares of Common Stock shall be split
     or 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 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.

           (d)    In case the Company shall, by dividend or otherwise,
     distribute to all holders of its Common Stock shares of any class of
     capital stock of the Company (other than any dividends or distributions to
     which Section 10.6(a) applies) or evidences of its Indebtedness, cash or
     other assets (including securities, but excluding (1) any rights or
     warrants referred to in Section 10.6(b) and (2) dividends and distributions
     paid exclusively in cash (the foregoing hereinafter in this Section 10.6(d)
     called the "Subject Securities"), unless the Company elects to reserve such
     Subject Securities for distribution to the Holders upon conversion of the
     Securities so that any such Holder converting Securities will receive upon
     such conversion, in addition to the shares of Common Stock to which such
     Holder is entitled, the amount and kind of such Subject Securities which
     such Holder would have received if such Holder had converted its Securities
     into Common Stock immediately prior to the Record Date for such
     distribution of the Subject

                                      46

<PAGE>

     Securities, then, in each such case, the Conversion Price shall be reduced
     so that the same shall be equal to the price determined by multiplying the
     Conversion Price in effect immediately prior to the close of business on
     the Record Date with respect to such distribution by a fraction of which
     the numerator shall be the Current Market Price on such date less the fair
     market value on such date of the portion of the Subject Securities so
     distributed applicable to one share of Common Stock and the denominator
     shall be such Current Market Price, such reduction to become effective
     immediately prior to the opening of business on the day following the
     Record Date; provided, however, that in the event the then fair market
     value of the portion of the Subject Securities so distributed applicable to
     one share of Common Stock is equal to or greater than the Current Market
     Price on the Record Date, then in lieu of the foregoing adjustment,
     adequate provision shall be made so that each Holder shall have the right
     to receive upon conversion of a Security (or any portion thereof) the
     amount of Subject Securities such Holder would have received had such
     Holder converted such Security (or portion thereof) immediately prior to
     such Record Date. In the event that such dividend or distribution is not so
     paid or made, the Conversion Price shall again be adjusted to be the
     Conversion Price which would then be in effect if such dividend or
     distribution had not been declared.

           For purposes of this Section 10.6(d) and Sections 10.6(a) and (b),
     any dividend or distribution to which this Section 10.6(d) is otherwise
     applicable that also includes shares of Common Stock, or rights or warrants
     to subscribe for or purchase shares of Common Stock applies (or both),
     shall be deemed instead to be (1) a dividend or distribution of the
     evidences of Indebtedness, assets, shares of capital stock, rights or
     warrants (other than such shares of Common Stock or rights or warrants)
     (and any Conversion Price reduction required by this Section 10.6(d) with
     respect to such dividend or distribution shall then be made) immediately
     followed by (2) a dividend or distribution of such shares of Common Stock
     or such rights or warrants (and any further Conversion Price reduction
     required by Sections 10.6(a) and (b) with respect to such dividend or
     distribution shall then be made), except (A) the Record Date of such
     dividend or distribution shall be substituted as "the date fixed for the
     determination of shareholders entitled to receive such dividend or other
     distribution", "Record Date fixed for such determination" and "Record Date"
     within the meaning of Section 10.6(a) and as "the date fixed for the
     determination of shareholders entitled to receive such rights or warrants",
     "the Record Date fixed for the determination of the shareholders entitled
     to receive such rights or warrants" and "such Record Date" within the
     meaning of Section 10.6(b) and (B) any shares of Common Stock included in
     such dividend or distribution shall not be deemed "outstanding at the close
     of business on the Record Date fixed for such determination" within the
     meaning of Section 10.6(a).

           With respect to any shareholder rights plan existing on the date
     hereof or in the event that the Company implements any other shareholder
     rights plan, upon conversion of the Securities the Holders will receive, in
     addition to the Common Stock issuable upon such conversion, the rights
     issued under such rights plan (notwithstanding the occurrence of an event
     causing such rights to separate from the Common Stock at or prior to the
     time of conversion); provided, a Holder who is a holder of Common Stock (or
     direct or indirect interests therein) at the time of conversion, but who is
     not entitled as such a holder to such rights pursuant to the terms of any
     such plan, shall not be eligible to receive any such rights hereunder. Any
     distribution of rights or warrants pursuant to a

                                      47

<PAGE>

     shareholder rights plan complying with the requirements set forth in the
     immediately preceding sentence of this paragraph shall not constitute a
     distribution of rights or warrants for the purposes of the other provisions
     of this Section 10.6(d).

           (e)    In case the Company shall, by dividend or otherwise,
     distribute to all holders of its Common Stock cash, in an aggregate amount
     that, combined together with (1) the aggregate amount of all other such
     all-cash distributions to all holders of its Common Stock within the twelve
     (12) months preceding the date of payment of such distribution, and in
     respect of which no adjustment pursuant to this Section 10.6(e) or Section
     10.6(f) has been made, and (2) the aggregate of any cash plus the fair
     market value of other consideration payable in respect of any tender offer
     by the Company or any Subsidiary for all or any portion of the Common Stock
     concluded within the twelve (12) months preceding the date of payment of
     such distribution, and in respect of which no adjustment pursuant to this
     Section 10.6(e) or Section 10.6(f) has been made (such aggregate amount,
     the "Common Dividend Amount"), exceeds 10% of the product of the Current
     Market Price on the Record Date with respect to such distribution times the
     number of shares of Common Stock outstanding on such date (the "Market
     Capitalization"), then, and in each such case, immediately after the close
     of business 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 close of business on such Record Date by
     a fraction (i) the numerator of which shall be equal to the Current Market
     Price on the Record Date less an amount equal to the quotient of (x) the
     amount by which the Common Dividend Amount exceeds 10% of the Market
     Capitalization and (y) the number of shares of Common Stock outstanding on
     the Record Date and (ii) the denominator of which shall be equal to the
     Current Market Price on such date; provided, however, that in the event the
     portion of the cash so distributed applicable to one share of Common Stock
     is equal to or greater than the Current Market Price of the Common Stock on
     the Record Date, in lieu of the foregoing adjustment, adequate provision
     shall be made so that each Holder shall have the right to receive upon
     conversion of a Security (or any portion thereof) the amount of cash such
     Holder would have received had such holder converted such Security (or
     portion thereof) immediately prior to such Record Date. In the event that
     such dividend or distribution is not so paid or made, the Conversion Price
     shall again be adjusted to be the Conversion Price which would then be in
     effect if such dividend or distribution had not been declared.

           (f)    In case a tender offer made by the Company or any Subsidiary
     for all or any portion of the Common Stock shall expire and such tender
     offer shall require the payment to holders of Common Stock of an aggregate
     cash plus the fair market value of other consideration payable that
     together with

                  (1)      the aggregate of the cash plus the fair market value
           of other consideration payable in respect of any other tender offers
           by the Company or any of its Subsidiaries for all or any portion of
           the Common Stock expiring within the twelve (12) months preceding the
           expiration of such tender offer and in respect of which no adjustment
           pursuant to Section 10.6(e) or this Section 10.6(f) has been made,
           and

                                      48

<PAGE>

                  (2)      the aggregate amount of any all-cash distributions to
           all holders of the Company's Common Stock made within twelve (12)
           months preceding the expiration of such tender offer and in respect
           of which no adjustment pursuant to Section 10.6(e) or this Section
           10.6(f) has been made,

     exceeds 10% of the product of the Current Market Price as of the time of
     expiration of such tender offer times the number of shares of Common Stock
     outstanding at such time, then, and in each such case, immediately prior to
     the opening of business on the day after the expiration of such tender
     offer, the Conversion Price shall be adjusted so that the same shall equal
     the price determined by multiplying the Conversion Price in effect
     immediately prior to the close of business on the date of the expiration of
     such tender offer by a fraction of which the numerator shall be the number
     of shares of Common Stock outstanding on the date of expiration of the
     tender offer multiplied by the Current Market Price of the Common Stock on
     the Trading Day next succeeding the date of expiration of the tender offer
     and the denominator shall be the sum of (x) the fair market value of the
     aggregate consideration payable for all shares of Common Stock validly
     tendered and not withdrawn as of the date of expiration of the tender offer
     and (y) the product of the number of shares of Common Stock outstanding
     less all shares validly tendered and not withdrawn as of the date of
     expiration of the tender offer and the Current Market Price of the Common
     Stock on the Trading Day next succeeding the date of expiration of the
     tender offer, such reduction (if any) to become effective immediately prior
     to the opening of business on the day following the date of expiration of
     the tender offer. In the event the Company is permanently prevented by
     applicable law from effecting any such purchases or all such purchases are
     rescinded, the Conversion Price shall again be adjusted to be the
     Conversion Price which would then be in effect if such tender offer had not
     been made. If the application of this Section 10.6(f) to any tender offer
     would result in an increase in the Conversion Price, no adjustment shall be
     made for such tender offer under this Section 10.6(f).

           (g)    For purposes of this Section 10.6, the following terms have
     the meanings indicated:

                  (1)      "Closing Price" with respect to any securities on any
           day shall mean the closing sale price regular way on such day or, in
           case no such sale takes place on such day, the average of the
           reported closing bid and asked prices, regular way, in each case on
           the Nasdaq National Market or New York Stock Exchange, as applicable,
           or, if such security is not listed or admitted to trading on such
           Nasdaq National Market or New York Stock Exchange, on the principal
           national security exchange or quotation system on which such security
           is quoted or listed or admitted to trading, or, if not quoted or
           listed or admitted to trading on any national securities exchange or
           quotation system, the average of the closing bid and asked prices of
           such security on the over-the-counter market on the day in question
           as reported by the National Quotation Bureau Incorporated, or a
           similar generally accepted reporting service, or if not so available,
           in such manner as furnished by any New York Stock Exchange member
           firm selected from time to time by the Board of Directors for that
           purpose, or a price determined in good

                                      49

<PAGE>

           faith by the Board of Directors, whose determination shall be
           conclusive and described in a Board Resolution.

                  (2)      "Current Market Price" shall mean the average of the
           Closing Prices per share of Common Stock for the ten (10) consecutive
           Trading Days immediately prior to the date for which a Current Market
           Price is required; 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 Section 10.6(a), (b), (c), (d),
                  (e) or (f) occurs during such ten consecutive Trading Days,
                  then the Closing Price for each Trading Day prior to the "ex"
                  date for such 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 event,

                           (ii)     if the "ex" date for any event (other than
                  the issuance or distribution requiring such computation) that
                  requires an adjustment to the Conversion Price pursuant to
                  Section 10.6(a), (b), (c), (d), (e) or (f) occurs on or after
                  the "ex" date for the issuance or distribution requiring such
                  computation and prior to the Trading Day in question, then the
                  Closing Price for each Trading Day on and after the "ex" date
                  for such 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 event, and

                           (iii)    if the "ex" date for the issuance or
                  distribution requiring such computation is prior to the
                  Trading Day in question, after taking into account any
                  adjustment required pursuant to clause (1) or (2) 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 of the evidences of
                  indebtedness, shares of capital stock or assets being
                  distributed applicable to one share of Common Stock as of the
                  close of business on the day before such "ex" date.

                  For purposes of any computation under Section 10.6(f), the
           Current Market Price of the Common Stock on any date shall be deemed
           to be the average of the daily Closing Prices per share of Common
           Stock for such day and the next two succeeding Trading Days;
           provided, however, that if the "ex" date for any event (other than
           the tender offer requiring such computation) that requires an
           adjustment to the Conversion Price pursuant to Section 10.6(a), (b),
           (c), (d), (e) or (f) occurs on or after the date of expiration of the
           tender or exchange offer requiring such computation and prior to the
           day 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.

                                      50

<PAGE>

                  For purposes of this definition, the term "ex" date,
           (1) 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, (2) 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 (3) 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
           of such offer.

                  Notwithstanding the foregoing, wherever successive adjustments
           to the Conversion Price are called for pursuant to this Section 10.6,
           such adjustments shall be made to the current Market Price as may be
           necessary or appropriate to effectuate the intent of this Section
           10.6 and to avoid unjust and inequitable results as determined in
           good faith by the Board of Directors.

                  (3)      "fair market value" shall mean the amount which a
           willing buyer would pay a willing seller in an arm's length
           transaction determined in good faith by the Board of Directors, whose
           determination shall be conclusive and described in a Board
           Resolution.

                  (4)      "Record Date" shall mean, with respect to any
           dividend, distribution or other transaction or event in which the
           holders of Common Stock have the right to receive any cash,
           securities or other property or in which the Common Stock (or other
           applicable security) is exchanged for or converted into any
           combination of cash, securities or other property, the date fixed for
           determination of shareholders entitled to receive such cash,
           securities or other property (whether such date is fixed by the Board
           of Directors or by statute, contract or otherwise).

                  (5)      "Trading Day" shall mean (x) if the applicable
           security is listed or admitted for trading on the New York Stock
           Exchange or another national security exchange, a day on which the
           New York Stock Exchange or such other national security exchange, as
           the case may be, is open for business, (y) if the applicable security
           is quoted on the Nasdaq National Market, a day on which trades may be
           made thereon or (z) if the applicable security is not so listed,
           admitted for trading or quoted, any day other than a Saturday or
           Sunday or a day on which banking institutions in the State of New
           York are authorized or obligated by law or executive order to close.

           (h)    The Company may make such reductions in the Conversion Price,
     in addition to those required by Sections 10.6(a), (b), (c), (d), (e) and
     (f), as the Board of Directors considers to be advisable to avoid or
     diminish any income tax to holders of Common Stock or rights to purchase
     Common Stock resulting from any dividend or

                                      51

<PAGE>

     distribution of stock (or rights to acquire stock) or from any event
     treated as such for income tax purposes.

           To the extent permitted by applicable law, the Company from time to
     time may reduce the Conversion Price by any amount for any period of time
     if the period is at least twenty (20) days and the reduction is irrevocable
     during the period. Whenever the Conversion Price is reduced pursuant to the
     preceding sentence, the Company shall mail to the Holder of each Security
     at his last address appearing on the register maintained by the Registrar a
     notice of the reduction at least fifteen (15) days prior to the date the
     reduced Conversion Price takes effect, and such notice shall state the
     reduced Conversion Price and the period during which it will be in effect.

           (i)    No adjustment in the Conversion Price shall be required unless
     such adjustment would require an increase or decrease of at least 1% in
     such price; provided, however, that any adjustment that would otherwise be
     required to be made shall be carried forward and taken into account in any
     subsequent adjustment. All calculations under this Article Ten shall be
     made by the Company and shall be made to the nearest cent or to the nearest
     one hundredth of a share, as the case may be. No adjustment need be made
     for a Company plan for reinvestment of dividends or interest or for a
     change in the par value or no par value of the Common Stock.

           (j)    Whenever the Conversion Price is adjusted as herein provided,
     the Company shall promptly file with the Trustee, and any Conversion Agent
     other than the Trustee, an Officers' Certificate setting forth the
     Conversion Price after such adjustment and setting forth a brief statement
     of the facts requiring such adjustment. Unless and until a Trust Officer of
     the Trustee shall have received such Officers' Certificate, the Trustee
     shall not be deemed to have knowledge of any adjustment of the Conversion
     Price and may assume without inquiry that the last Conversion Price of
     which it has knowledge remains in effect. Promptly after delivery of such
     certificate, the Company shall prepare a notice of such adjustment of the
     Conversion Price setting forth the adjusted Conversion Price and the date
     on which each adjustment becomes effective and shall mail such notice of
     such adjustment of the Conversion Price to the Holder of each Security at
     his last address appearing on the register maintained by the Registrar,
     within twenty (20) days of the effective date of such adjustment. Failure
     to deliver such notice shall not affect the legality or validity of any
     such adjustment.

           (k)    In any case in which this Section 10.6 provides that an
     adjustment shall become effective immediately after a Record Date for an
     event, the Company may defer until the occurrence of such event (i) issuing
     to the Holder of any Security converted after such Record Date and before
     the occurrence of such event the additional shares of Common Stock issuable
     upon such conversion by reason of the adjustment required by such event
     over and above the Common Stock issuable upon such conversion before giving
     effect to such adjustment and (ii) paying to such Holder any amount in cash
     in lieu of any fraction pursuant to Section 10.3.

           (l)    For purposes of this Section 10.6, the number of shares of
     Common Stock at any time outstanding shall not include shares held in the
     treasury of the Company but

                                      52

<PAGE>

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

SECTION 10.7      Effect of Reclassification, Consolidation, Merger or Sale.
                  ---------------------------------------------------------

           In the case of (i) any reclassification or change of the outstanding
shares of 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, or as a result of an increase or decrease in the number of
outstanding shares), (ii) any consolidation, merger or combination of the
Company with another corporation or (iii) any sale or conveyance of the
properties and assets of the Company as, or substantially as, an entirety to any
other corporation, in each such case as a result of which holders of Common
Stock shall be entitled to receive stock, securities or other property or assets
(including cash), in respect of or in exchange for all shares of Common Stock,
then, unless an adjustment with respect thereto shall be made pursuant to
Section 10.6, the Company or the successor or purchasing corporation, as the
case may be, shall execute with the Trustee a supplemental indenture providing
that the Securities shall thereafter be convertible into the kind and amount of
shares of stock and other securities or property or assets (including cash)
receivable upon such reclassification, change, consolidation, merger,
combination, sale or conveyance by a holder of a number of shares of Common
Stock issuable upon conversion of such Securities immediately prior to such
reclassification, change, consolidation, merger, combination, sale or conveyance
and assuming such holder of Common Stock did not exercise rights of election, if
any, as to the kind or amount of securities, cash or other property receivable
upon such consolidation, merger, statutory exchange, sale or conveyance. Such
supplemental indenture shall provide for adjustments which shall be as nearly
equivalent as may be practicable to the adjustments provided for in this Article
Ten. If, in the case of any such reclassification, change, consolidation,
merger, combination, sale or conveyance, the stock or other securities and
assets receivable thereupon by a holder of shares of Common Stock include shares
of stock or other securities and assets of a Person other than the successor or
purchasing corporation, as the case may be, in such reclassification, change,
consolidation, merger, combination, sale or conveyance, then such supplemental
indenture shall also be executed by such other Person and shall contain such
additional provisions to protect the interests of the Holders as the Board of
Directors shall reasonably consider necessary by reason of the foregoing.

           The Company shall cause notice of the execution of such supplemental
indenture to be mailed to each Holder of Securities, at its address appearing on
the register maintained by the Registrar, within twenty (20) days after
execution thereof. Failure to deliver such notice shall not affect the legality
or validity of such supplemental indenture.

SECTION 10.8      Notice of Certain Transactions.
                  ------------------------------

           If:

           (1)    the Company proposes to take any action that would require an
     adjustment in the Conversion Price;

                                      53

<PAGE>

           (2)    the Company proposes to take any action that would require a
     supplemental indenture pursuant to Section 10.7; or

           (3)    there is a proposed liquidation, winding up or dissolution of
     the Company,

the Company shall mail to Holders a notice stating the proposed record date for
a dividend or distribution or the proposed effective date of a subdivision,
combination, reclassification, consolidation, merger, transfer, lease,
liquidation or dissolution. The Company shall mail the notice at least 15 days
before such date. Failure to mail the notice or any defect in it shall not
affect the validity of the transaction.

SECTION 10.9      Company Determination Final.
                  ---------------------------

           Any determination that the Board of Directors makes pursuant to this
Article Ten is conclusive, absent manifest error.

SECTION 10.10     Trustee's Disclaimer.
                  --------------------

           The Trustee has no duty to determine when an adjustment under this
Article or under the terms of the Securities should be made, how it should be
made or what it should be. Such information shall be timely provided to the
Trustee in an Officers' Certificate. The Trustee has no duty to determine
whether any provisions of a supplemental indenture under Section 10.7 are
correct. The Trustee 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. Each
Conversion Agent other than the Company shall have the same protection under
this Section 10.10 as the Trustee.

                                 ARTICLE ELEVEN

                               COLLATERAL SECURITY

SECTION 11.1      Collateral Security.
                  -------------------

           (a)    On the Issue Date, the Company shall (i) enter into the Pledge
Agreement and the Control Agreement and thereafter comply with the terms and
provisions of each such agreements and (ii) pledge the Pledged Securities (and
additional Pledged Securities prior to any sale of Option Securities (as defined
in the Pledge Agreement)) to the Collateral Agent for the benefit of the Trustee
and the ratable benefit of the Holders in such amount as will be sufficient upon
receipt of scheduled interest and/or principal payments of such Pledged
Securities to provide for payment in full of the first six scheduled interest
payments due on the Securities. The Pledged Securities shall be pledged by the
Company to the Collateral Agent for the benefit of the Trustee and the ratable
benefit of the Holders and shall be held by the Collateral Agent in the Pledge
Account pending disposition pursuant to the Pledge Agreement.

           (b)    Each Holder, by its acceptance of a Security, consents and
agrees to the terms of the Pledge Agreement (including, without limitation, the
provisions providing for foreclosure and release of the Pledged Securities) and
the Control Agreement as either such agreement may be in effect or may be
amended from time to time in accordance with their terms,

                                      54

<PAGE>

and authorizes and directs the Collateral Agent and the Trustee to enter into
the Pledge Agreement and the Control Agreement and to perform their respective
obligations and exercise their respective rights under each such agreement in
accordance therewith. The Company will do or cause to be done all such acts and
things as may be necessary or reasonably requested by the Collateral Agent or
the Trustee, or as may be required by the provisions of the Pledge Agreement and
the Control Agreement, to assure and confirm to the Collateral Agent and the
Trustee the security interest in the Pledged Securities contemplated hereby, by
the Pledge Agreement or by the Control Agreement or any part of any such
agreement, as from time to time constituted, so as to render the same available
for the security and benefit of this Indenture and of the Securities secured
hereby, according to the intent and purposes herein and therein expressed. The
Company shall take, or cause to be taken, upon request of the Collateral Agent
or the Trustee, any and all actions reasonably required to create and maintain,
as security for the obligations of the Company under this Indenture and the
Securities, a valid, enforceable and perfected first priority Lien in and on all
the Pledged Securities, in favor of the Collateral Agent for the benefit of the
Trustee and the ratable benefit of the Holders, superior to and prior to the
rights of third Persons and subject to no other Liens.

           (c)    The release of any portion of the Pledged Securities pursuant
to the Pledge Agreement will not be deemed to impair the security under this
Indenture in contravention of the provisions hereof if and to the extent the
Pledged Securities are released pursuant to this Indenture, the Pledge Agreement
and the Control Agreement. To the extent applicable, the Company shall cause TIA
Section 314(d) relating to the release of property or securities from the Lien
and security interest of the Pledge Agreement and relating to the substitution
therefore of any property or securities to be subjected to the Lien and security
interest of the Pledge Agreement to be complied with. Any certificate or opinion
required by TIA Section 314(d) may be made by an Officer of the Company, except
in cases where TIA Section 314(d) requires that such certificate or opinion be
made by an independent Person, which Person shall be an independent engineer,
appraiser or other expert selected by the Company.

           (d)    The Company shall cause TIA Section 314(b), relating to
opinions of counsel regarding the Lien under the Pledge Agreement, to be
complied with. The Collateral Agent and the Trustee may accept, to the extent
permitted by Sections 4.4 and 7.6 as conclusive evidence of compliance with the
foregoing provisions, the appropriate statements contained in such instruments.

           (e)    The Collateral Agent and the Trustee may, in their sole
discretion and without the consent of the Holders, on behalf of the Holders,
take all reasonable actions in accordance with the Pledge Agreement and the
Control Agreement, necessary or appropriate in order to (i) enforce any of the
terms of the Pledge Agreement and the Control Agreement and (ii) collect and
receive any and all amounts payable in respect of the obligations of the Company
under such agreements. The Collateral Agent and the Trustee shall have power to
institute and to maintain such suits and proceedings as the they may reasonably
deem expedient to preserve or protect their interests and the interests of the
Holders in the Pledged Securities (including power to institute and maintain
suits or proceedings to restrain the enforcement of or compliance with any
legislative or other governmental enactment, rule or order that may be
unconstitutional or otherwise invalid if the enforcement of, or compliance with,
such enactment, rule or order would

                                      55

<PAGE>

impair the security interest hereunder or be prejudicial to the interests of the
Holders, the Collateral Agent or of the Trustee).

                                 ARTICLE TWELVE

                                  SUBORDINATION

SECTION 12.1      Securities Subordinated to Senior Indebtedness.
                  ----------------------------------------------

           The Company covenants and agrees, and each Holder of a Security, by
its acceptance thereof, likewise covenants and agrees, that the indebtedness
evidenced by the Securities and the payment of the principal of (and premium, if
any) and interest on each and all of the Securities (except as set forth in this
Article Twelve with respect to Permitted Payments) is hereby expressly
subordinate and junior, to the extent and in the manner hereinafter set forth,
in right of payment to the prior payment in full of all Senior Indebtedness.

           (a)    Upon any distribution of the Company's assets upon any
dissolution, winding-up, liquidation or reorganization, or in bankruptcy,
insolvency, receivership or similar proceedings, payment of the principal of,
premium, if any, interest and all other obligations in respect of the
Securities, including by way of redemption, acquisition or other purchase
thereof, on the Securities (except for Permitted Payments and payments the
Company may choose to make comprised solely of Permitted Junior Securities
acceptable to the Holders) will be subordinated in right of payment to the prior
payment in full, in cash or other payment satisfactory to holders of Senior
Indebtedness, of all of the Company's existing and future Senior Indebtedness.

           For purposes of this Article Twelve, the words, "cash, securities or
other property" shall not be deemed to include shares of 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, the payment of which
is subordinated at least to the extent provided in this Article Twelve with
respect to the Securities to the payment of all Senior Indebtedness which may at
the time be outstanding; provided that (i) the Senior Indebtedness is assumed by
the new corporation, if any, resulting from any reorganization or readjustment,
and (ii) the rights of the holders of Senior Indebtedness (other than leases
which are not assumed by the Company or the new corporation, as the case may be)
are not, without the consent of such holders, altered by such reorganization or
readjustment. 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 property as an entirety, or
substantially as an entirety, to another Person upon the terms and conditions
provided for in Article Five shall not be deemed a dissolution, winding-up,
liquidation or reorganization for the purposes of this Section 12.1(a) if such
other Person shall, as a part of such consolidation, merger, conveyance or
transfer, comply with the conditions stated in Article Five.

           (b)    No payment (except for Permitted Payments and payments the
Company may choose to make comprised solely of Permitted Junior Securities
acceptable to the Holders) upon redemption or repurchase shall be made by the
Company with respect to the principal of, premium, if any, or interest on the
Securities or to acquire any of the Securities, if (i) any default

                                      56

<PAGE>

in payment of the principal of or premium, if any, or interest on, or any other
obligation under any Designated Senior Indebtedness occurs and is continuing
beyond any applicable grace period with respect thereto (a "Payment Default"),
unless and until all such payments due in respect of such Designated Senior
Indebtedness have been paid in full in cash or other consideration satisfactory
to holders of Senior Indebtedness or such default shall have been cured or
waived or shall have ceased to exist, or (ii) any event of default, other than a
Payment Default, with respect to any Designated Senior Indebtedness occurs and
is continuing permitting the holders of such Designated Senior Indebtedness (or
a trustee or other representative on behalf of the holders thereof) to declare
such Designated Senior Indebtedness due and payable prior to the date on which
it would otherwise have become due and payable, and the Trustee receives notice
thereof from the Company or by any holders of such Designated Senior
Indebtedness (or a trustee or other representative on behalf of the holders
thereof) (the "Payment Blockage Notice"), for a period (the "Payment Blockage
Period") ending on the earlier of the date on which such event of default shall
have been cured or waived or shall have ceased to exist or 179 days after
receipt of the Payment Blockage Notice; provided, further, any number of
additional Payment Blockage Periods may be commenced during an existing Payment
Blockage Period; provided, however, that no such additional Payment Blockage
Period shall extend beyond the initial Payment Blockage Period. Notwithstanding
anything in the subordination provisions of this Indenture or the Securities to
the contrary, (x) in no event will a Payment Blockage Period extend beyond 179
days from the date of the Payment Blockage Notice in respect thereof was given
and (y) there shall be no new Payment Blockage Period unless and until 360 days
have elapsed since the initial effectiveness of the prior Payment Blockage
Period. No nonpayment default that existed or was continuing on the date of
delivery of any Payment Blockage Notice to the Trustee shall be the basis for a
subsequent payment blockage notice, unless the default has been cured or waived
for a period of not less than 90 consecutive days.

           (c)    If the maturity of the Securities is accelerated because of an
Event of Default, no payment (except for Permitted Payments and payments the
Company may choose to make comprised solely of Permitted Junior Securities
acceptable to the Holders) may be made on the Securities until all amounts due
or to become due on Senior Indebtedness have been paid in full in cash or other
consideration satisfactory to holders of Senior Indebtedness or until such
acceleration has been cured or waived.

           (d)    In the event that, notwithstanding the foregoing provisions of
Sections 12.1(a), (b) and (c), any payment on account of principal of or
interest on the Securities shall be made by or on behalf of the Company and
received by the Trustee, by any Holder or by any Paying Agent (or, if the
Company is acting as its own Paying Agent, money for any such payment shall be
segregated and held in trust), at a time when such payment is not permitted by
any of such provisions, then, unless and until all Senior Indebtedness (or
Designated Senior Indebtedness, in the case of Section 12.1(b)) is paid in full
in cash or other consideration satisfactory to the holders thereof, or such
payment is otherwise permitted to be made by the provisions of each of Sections
12.1(a), 12.1(b) and 12.1(c) (subject, in each case, to the provisions of
Section 12.6), such payment on account of principal of or interest on the
Securities shall be held in trust for the benefit of, and shall be immediately
paid over to, the holders of Senior Indebtedness (or Designated Senior
Indebtedness, in the case of Section 12.1(b)) or their representative or
representatives or the trustee or trustees under any indenture under which any

                                      57

<PAGE>

instruments evidencing any of the Senior Indebtedness (or Designated Senior
Indebtedness, in the case of Section 12.1(b)) may have been issued, as their
interests may appear.

           Regardless of anything to the contrary herein, nothing shall prevent
(A) any payment by the Company or the Trustee to Holders of amounts in
connection with a redemption of Securities if (i) notice of such redemption has
been given pursuant to Section 3.1 prior to the receipt by the Trustee of a
Payment Blockage Notice, and (ii) such notice of redemption is given not earlier
than 60 days before the Redemption Date, or (B) any payment by the Trustee to
the Holders of amounts deposited with it pursuant to Section 8.1.

SECTION 12.2      Subrogation.
                  -----------

           Subject to the payment in full of all Senior Indebtedness to which
the indebtedness evidenced by the Securities (except for Permitted Payments) is
in the circumstances subordinated as provided in Section 12.1, the Holders of
the Securities (together with the holders of any other indebtedness of the
Company which is subordinate in right of payment to the payment in full of all
Senior Indebtedness, which is not subordinate in right of payment to the
Securities and which by its terms grants such right of subrogation to the
holders thereof) shall be subrogated to the rights of the holders of such Senior
Indebtedness to receive payments or distributions of cash, property or
securities of the Company applicable to such Senior Indebtedness until all
amounts owing on the Securities shall be paid in full, and, as among the
Company, its creditors other than holders of such Senior Indebtedness, and the
Holders of the Securities, no such payment or distribution made to the holders
of Senior Indebtedness by virtue of this Article which otherwise would have been
made to the Holders of the Securities shall be deemed to be a payment by the
Company on account of such Senior Indebtedness, it being understood that the
provisions of this Article 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.

SECTION 12.3      Obligation of Company Unconditional.
                  -----------------------------------

           Nothing contained in this Article or elsewhere in this Indenture or
in the Securities is intended to or shall impair, as between the Company, its
creditors other than the holders of Senior Indebtedness, and the Holders of the
Securities, the obligation of the Company, which is absolute and unconditional,
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 is intended to or shall affect the relative
rights of the Holders of the Securities and creditors of the Company other than
the holders of Senior Indebtedness, nor shall anything herein or therein 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 of the holders of Senior Indebtedness in
respect of cash, property or securities of the Company received upon the
exercise of any such remedy.

                                      58

<PAGE>

SECTION 12.4      Modification of Terms of Senior Indebtedness.
                  --------------------------------------------

           Any renewal or extension of the time of payment of any Senior
Indebtedness or the exercise by the holders of Senior Indebtedness of any of
their rights under any instrument creating or evidencing Senior Indebtedness,
including without limitation the waiver of default thereunder, may be made or
done without notice to or assent from the Holders of the Securities or the
Trustee.

           No compromise, alteration, amendment, modification, extension,
renewal or other change of, or waiver, consent or other action in respect of,
any liability or obligation under or in respect of, or of any of the terms,
covenants or conditions of any indenture or other instrument under which any
Senior Indebtedness is outstanding or of such Senior Indebtedness, whether or
not such release is in accordance with the provisions of any applicable
document, shall in any way alter or affect any of the provisions of this Article
or of the Securities relating to the subordination thereof.

SECTION 12.5      Effectuation of Subordination by Trustee.
                  ----------------------------------------

           Each Holder of Securities, by its acceptance thereof, authorizes and
directs the Trustee on his or her behalf to take such action as may be necessary
or appropriate to effectuate the subordination provided in this Article and
appoints the Trustee his or attorney-in-fact for any and all such purposes.

           Upon any payment or distribution of assets of the Company referred to
in this Article, the Trustee and the Holders of the Securities shall be entitled
to rely upon any order or decree made by any court of competent jurisdiction in
which any such dissolution, winding up, liquidation or reorganization proceeding
affecting the affairs of the Company is pending or upon a certificate of the
trustee in bankruptcy, receiver, assignee for the benefit of creditors,
liquidating trustee or agent or other Person making any payment or distribution,
delivered to the Trustee or to the Holders of the Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, and as to other facts pertinent to the right of such Persons under
this Article, and if such evidence is not furnished, the Trustee may defer any
payment to such Persons pending judicial determination as to the right of such
Persons to receive such payment.

SECTION 12.6      Knowledge of Trustee.
                  --------------------

           Notwithstanding the provisions of this Article or any other
provisions of this Indenture, the Trustee shall not be charged with knowledge of
the existence of any Senior Indebtedness, of any default in payment of principal
of, premium (if any) or interest on any Senior Indebtedness, or of any facts
which would prohibit the making of any payment of monies to or by the Trustee,
or the taking of any other action by the Trustee, unless and until a Trust
Officer of the Trustee having responsibility for the administration of the trust
established by this Indenture shall have received written notice thereof from
the Company, any Holder of Securities, any Paying or Conversion Agent of the
Company or the holder or representative of any class of Senior Indebtedness,
and, prior to the receipt of any such written notice, the Trustee shall be
entitled in all respects to assume that no such default or facts exist;
provided, however, that

                                      59

<PAGE>

unless on the third Business Day prior to the date upon which by the terms
hereof any such monies may become payable for any purpose the Trustee shall have
received the notice provided for in this Section 12.6, then, anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority to receive such monies and apply the same to the purpose for which
they were received, and shall not be affected by any notice to the contrary
which may be received by it on or after such date.

SECTION 12.7      Trustee's Relation to Senior Indebtedness.
                  -----------------------------------------

           The Trustee shall be entitled to all the rights set forth in this
Article with respect to any Senior Indebtedness at the time 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.

           Nothing in this Article shall apply to claims of or payments to the
Trustee under or pursuant to Section 7.7.

           With respect to the holders of Senior Indebtedness, the Trustee
undertakes to perform or to observe only such of its covenants and obligations
as are specifically set forth in this Article, and no implied covenants or
obligations with respect to the holders of Senior Indebtedness shall be read
into this Indenture against the Trustee. The Trustee shall not be deemed to owe
any fiduciary duty to the holders of Senior Indebtedness and the Trustee shall
not be liable to any holder of Senior Indebtedness if it shall pay over or
deliver to Holders, the Company or any other Person monies or assets to which
any holder of Senior Indebtedness shall be entitled by virtue of this Article or
otherwise.

SECTION 12.8      Rights of Holders of Senior Indebtedness Not Impaired.
                  -----------------------------------------------------

           No right of any present or future holder of any Senior Indebtedness
to enforce the subordination herein shall at any time or in any way be
prejudiced or impaired by any act or failure to act on the part of the Company
or by any noncompliance 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.

SECTION 12.9      Certain Conversions Not Deemed Payment.
                  --------------------------------------

           For the purposes of Article Ten only, (1) the issuance and delivery
of Permitted Junior Securities upon conversion of Securities in accordance with
Article Ten shall not be deemed to constitute a payment or distribution on
account of the principal of, premium, if any, or interest on Securities or on
account of the purchase or other acquisition of Securities, and (2) the payment,
issuance or delivery of cash (except in satisfaction of fractional shares
pursuant to Section 10.3 and Permitted Payments, if any), property or securities
(other than Permitted Junior Securities) upon conversion of a Security shall be
deemed to constitute payment on account of the principal of, premium, if any, or
interest on such Security. Nothing contained in this Article Twelve 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, the right, which is absolute and unconditional, of the Holder of any
Security to convert such note in accordance with Article Ten.

                                      60

<PAGE>

                                ARTICLE THIRTEEN

                                  MISCELLANEOUS

SECTION 13.1      Trust Indenture Act Controls.
                  ----------------------------

           If any provision of this Indenture limits, qualifies or conflicts
with another provision which is required to be included in this Indenture by the
TIA, the required provision shall control.

SECTION 13.2      Notices.
                  -------

           Any notice, request or communication by the Company or the Trustee to
the other is duly given if in writing and delivered in person, mailed by
first-class mail or by express delivery to the other's address stated in this
Section 13.2. The Company or the Trustee by notice to the other may designate
additional or different addresses for subsequent notices or communications.

           Any notice or communication to a Holder shall be mailed by
first-class mail to its address shown on the register kept by the Registrar.
Failure to mail a notice or communication to a Holder or any defect in it shall
not affect its sufficiency with respect to other Holders.

           If a notice or communication is mailed in the manner provided above,
it is duly given, whether or not the addressee receives it.

           If the Company mails a notice or communication to Holders, it shall
mail a copy to the Trustee and each Agent at the same time.

           All notices or communications shall be in writing.

           The Company's address is:

                  Scios Inc.
                  820 West Maude Avenue
                  Sunnyvale, California  94085

                  Attention:  General Counsel

           The Trustee's address is:

                  Wells Fargo Bank, National Association
                  45 Broadway, 12th Floor
                  New York, New York 10006

                  Attention:  Corporate Trust Department

                  With a copy to:

                  Wells Fargo Bank, National Association

                                      61

<PAGE>

                  707 Wilshire Blvd., 17th Floor
                  Los Angeles, CA 90017

                  Attention:  Corporate Trust Department

SECTION 13.3      Communication by Holders with Other Holders.
                  -------------------------------------------

           Holders may communicate pursuant to TIA [sec] 312(b) with other
Holders with respect to their rights under this Indenture or the Securities. The
Company, the Trustee, the Registrar and anyone else shall have the protection of
TIA [sec] 312(c).

SECTION 13.4      Certificate and Opinion as to Conditions Precedent.
                  --------------------------------------------------

           Upon any request or application by the Company to the Trustee to take
any action under this Indenture the Company shall furnish to the Trustee:

           (1)    an Officers' Certificate stating that, in the opinion of the
     signers, all conditions precedent, if any, provided for in this Indenture
     relating to the proposed action have been complied with; and

           (2)    an Opinion of Counsel stating that, in the opinion of such
     counsel, all such conditions precedent have been complied with.

           Each signer of an Officers' Certificate or an Opinion of Counsel may
(if so stated) rely, effectively, upon an Opinion of Counsel as to legal matters
and an Officers' Certificate as to factual matters if such signer reasonably and
in good faith believes in the accuracy of the document relied upon.

SECTION 13.5      Statements Required in Certificate or Opinion.
                  ---------------------------------------------

           Each Officers' Certificate or Opinion of Counsel with respect to
compliance with a condition or covenant provided for in this Indenture shall
include:

           (1)    a statement that the Person making such certificate or opinion
     has read such covenant or condition;

           (2)    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;

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

           (4)    a statement as to whether or not, in the opinion of such
     Person, such condition or covenant has been complied with.

                                      62

<PAGE>

SECTION 13.6      Rules by Trustee and Agents.
                  ---------------------------

           The Trustee may make reasonable rules for action by or at a meeting
of Holders. The Registrar, Paying Agent or Conversion Agent may make reasonable
rules and set reasonable requirements for their respective functions.

SECTION 13.7      Legal Holidays.
                  --------------

           A "Legal Holiday" is a Saturday, a Sunday or a day on which banking
institutions are not required to be open in The City of New York, in the State
of New York or in the city in which the Trustee administers its corporate trust
business. If a payment date is a Legal Holiday at a place of payment, payment
may be made at that place on the next succeeding day that is not a Legal
Holiday, and no interest shall accrue on that payment for the intervening
period.

           A "Business Day" is a day other than a Legal Holiday.

SECTION 13.8      No Recourse Against Others.
                  --------------------------

           All liability described in the Securities of any director, officer,
employee or shareholder, as such, of the Company is waived and released.

SECTION 13.9      Duplicate Originals.
                  -------------------

           The parties may sign any number of copies of this Indenture. Each
signed copy shall be an original, but all of them together represent the same
agreement.

SECTION 13.10     Governing Law.
                  -------------

           The laws of the State of New York, without regard to principles of
conflicts of law, shall govern this Indenture and the Securities.

SECTION 13.11     No Adverse Interpretation of Other Agreements.
                  ---------------------------------------------

           This Indenture may not be used to interpret another indenture, loan
or debt agreement of the Company or a Subsidiary. Any such indenture, loan or
debt agreement may not be used to interpret this Indenture.

SECTION 13.12     Successors.
                  ----------

           All agreements of the Company in this Indenture and the Securities
shall bind its successors. All agreements of the Trustee in this Indenture shall
bind its successors.

SECTION 13.13     Separability.
                  ------------

           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
and a Holder shall have no claim therefor against any party hereto.

                                      63

<PAGE>

SECTION 13.14     Table of Contents, Headings, etc.
                  --------------------------------

           The Table of Contents, Cross-Reference Table and headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part hereof and shall in no way
modify or restrict any of the terms or provisions hereof.

                                      64

<PAGE>

                                      S-1

                                   SIGNATURES

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

                                   SCIOS INC.

                                   By:      /s/  David W. Gryska
                                            ------------------------------
                                            Name:     David W. Gryska
                                            Title:    CFO

                                   WELLS FARGO BANK, NATIONAL ASSOCIATION,
                                      as Trustee

                                   By:      /s/  Jeanie Mar
                                            ------------------------------
                                            Name:     Jeanie Mar
                                            Title:    Vice President, Authorized
                                                      Officer

<PAGE>

                                                                       EXHIBIT A
                                                                       ---------

REGISTERED                         [Face of Security]
NUMBER                                                           $______________

CUSIP______________                   SCIOS INC.

                    5.50% CONVERTIBLE SUBORDINATED NOTE DUE 2009

                  SCIOS INC., a Delaware corporation (herein called the
"Company"), for value received, hereby promises to pay to Cede & Co. or
registered assigns, the principal sum of _____________ DOLLARS ($__________) on
August 15, 2009, and to pay interest thereon as provided on the reverse hereof
on the principal sum, until the principal hereof and any unpaid and accrued
interest is paid or duly provided for. The right to payment of principal,
premium, if any, and interest is subordinated to the rights of Senior
Indebtedness as set forth in the Indenture referred to on the reverse side
hereof.

         Interest Payment Dates: February 15 and August 15, with the first
payment to be made on February 15, 2003.

         Record Dates:  February 1 and August 1.

                                      A-1

<PAGE>

           IN WITNESS WHEREOF, SCIOS INC. has caused this instrument to be duly
signed.

                                     SCIOS INC.

                                     By:     __________________________________
                                             Name:
                                             Title:

Dated:

TRUSTEE'S CERTIFICATE OF
     AUTHENTICATION

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

WELLS FARGO BANK, NATIONAL ASSOCIATION,
as Trustee

By:__________________________________________________
                 Authorized Officer

                                      A-2

<PAGE>

                               [REVERSE OF SECURITY]

                                   SCIOS INC.

                   5.50% CONVERTIBLE SUBORDINATED NOTE DUE 2009

                  1.       Interest. Scios Inc., a Delaware corporation (the
"Company"), promises to pay interest on the principal amount of this Security at
the rate per annum shown above. The Company will pay interest semi-annually in
arrears on February 15 and August 15 of each year, with the first payment to be
made on February 15, 2003. Interest on the Securities will accrue on the
principal amount from the most recent date to which interest has been paid or
duly provided for or, if no interest has been paid, from August 5, 2002.
Interest will be computed on the basis of a 360-day year of twelve 30-day
months.

                   The Holder of this Note is entitled to the benefits of the
Pledge Agreement, dated as of August 5, 2002, by and among the Company, Wells
Fargo Bank, National Association, as the trustee (the "Trustee"), and Wells
Fargo Bank, National Association, as collateral agent for the Trustee and the
Holders from time to time (the "Collateral Agent") and pursuant to which the
Company has placed in the Pledge Account cash or Pledged Securities sufficient
to provide for the payment of the first six interest payments on the Securities.

                  2.       Maturity. The Securities will mature on August 15,
 2009 unless earlier converted, redeemed or repurchased pursuant to the terms
hereof and the Indenture.

                  3.       Method of Payment. The Company will pay interest on
the Securities (except defaulted interest) to the Persons who are registered
Holders of Securities at the close of business on the record date set forth on
the face of this Security next preceding the applicable interest payment date
except that (i) interest payable upon redemption or repurchase, unless the date
of redemption or repurchase is an interest payment date, will be payable to the
Person to whom the principal is payable and (ii) in the case of any Security or
portion of any Security that is converted into Common Stock during the period
from, but excluding, a record date for any interest payment date to, but
excluding, that interest payment date either (A) if the Security, or portion of
the Security, has been called for redemption on a redemption date that occurs
during that period, or is to be repurchased on a Repurchase Date that occurs
during that period, the Company will not be required to pay interest on that
interest payment date in respect of any Security, or portion of any Security,
that is so redeemed or repurchased; or (B) if otherwise, any Security or portion
of any Security that is not called for redemption but is submitted for
conversion during that period must be accompanied by funds equal to the interest
payable on that interest payment date on the principal amount so converted.
Holders must surrender Securities to a Paying Agent to collect the principal
payments. The Company will pay the principal, premium, if any, and interest in
money of the United States that at the time of payment is legal tender.
Principal and interest may, at the Company's option, be paid either (i) by check
mailed to the address of the Person entitled to the interest as it appears in
the register kept by the Registrar (provided (a) payments to the Depositary will
be made by wire transfer of immediately available funds to the account of the
Depositary or its nominee and (b) a Holder with an aggregate principal amount of
Securities in excess of $2 million will, at the written election of the Holder,
filed on or before the relevant record date with the Trustee, be paid by wire
transfer

                                      A-3

<PAGE>

in immediately available funds); or (ii) by transfer to an account maintained
by that Person located in the United States.

                  4.       Paying Agent, Registrar, Conversion Agent. Initially,
the Trustee will act as Paying Agent, Registrar and Conversion Agent. The
Company may change any Paying Agent, Registrar or Conversion Agent without
notice. The Company may act in any such capacity.

                  5.       Indenture. The Company issued the Securities under an
Indenture, dated as of August 5, 2002 (the "Indenture"), between the Company and
the Trustee. The terms of the Securities include those stated in the Indenture
and those made part of the Indenture by reference to the Trust Indenture Act of
1939 (15 U.S. Code [sec][sec] 77aaa-77bbbb) (the "Act") as in effect on the date
of the Indenture. The Securities are subject to all such terms, and Holders are
referred to the Indenture and the Act for a statement of such terms. The
Securities are general unsecured subordinated obligations of the Company limited
to a maximum of $150,000,000 aggregate principal amount (plus such additional
amount (up to an aggregate of $175,000,000) purchased by the Initial Purchasers
pursuant to the option described in Section 2.2 of the Indenture), except as
otherwise provided in the Indenture (except for Securities issued in
substitution for destroyed, mutilated, lost or stolen Securities). Terms used
herein which are defined in the Indenture have the meanings assigned to them in
the Indenture.

                  6.       Optional Redemption by the Company. At any time on or
after August 19, 2005, the Company may redeem the Securities on at least 30
days' notice as a whole or, from time to time, in part at the following prices,
expressed as a percentage of the principal amount, together with accrued
interest to, but excluding, the date fixed for redemption:

<TABLE>
<CAPTION>
                                                                                                        Redemption
Period                                                                                                     Price
------                                                                                                  ----------
<S>                                                                                                      <C>
Beginning August 19, 2005 and ending on August 14, 2006..........................................        103.143%
Beginning August 15, 2006 and ending on August 14, 2007..........................................        102.357%
Beginning August 15, 2007 and ending on August 14, 2008..........................................        101.571%
Beginning August 15, 2008 and ending on August 14, 2009..........................................        100.786%
</TABLE>

Any accrued interest becoming due on the date fixed for redemption will be
payable to the holders of record on the relevant record date of the Securities
being redeemed.

                  7.       Notice of Redemption. Notice of redemption pursuant
to paragraph 6 will be mailed at least 30 days before the redemption date to
each Holder of Securities to be redeemed at its registered address. Securities
in denominations larger than $1,000 principal amount may be redeemed in part but
only in whole multiples of $1,000 principal amount. On and after the redemption
date interest ceases to accrue on Securities or portions of them called for
redemption.

                  8.       Repurchase at Option of Holder. Pursuant to Section
3.8 of the Indenture, within 30 days after a Change in Control occurs, the
Company is required to give notice of the Change in Control to the Holders. Each
Holder has the right, at its option, to require the Company to repurchase all or
any portion of the Securities on a date fixed by the Company not

                                      A-4

<PAGE>

more than 60 days after the occurrence of a Change in Control. The Repurchase
Price will be 100% of the principal amount of the Securities submitted for
repurchase, plus accrued and unpaid interest to, but excluding, the Repurchase
Date. If a Repurchase Date is an interest payment date, then the interest
payable on that date will be paid to the holder of record on the relevant record
date. Subject to the conditions of Section 3.8 of the Indenture, the Company may
elect to pay the Repurchase Price (to the extent not paid in cash) by delivering
the number of shares of Common Stock equal to (i) the Repurchase Price (to the
extent not paid in cash) divided by (ii) 95% of the average of the Closing
Prices per share of the Common Stock for the five Trading Days immediately
preceding and including the third Trading Day preceding the Repurchase Date.

                  9.       Conversion. A Holder of a Security may convert the
principal of such Security into Common Stock at any time after the date of
original issuance of the Security to the close of business on the business day
prior to the close of business on August 15, 2009, or (x) if the Security is
called for redemption by the Company, the Holder may convert it at any time
before the close of business on the date that is one business day before the
date fixed for such redemption, or (y) if the Security is to be repurchased by
the Company pursuant to paragraph 8 hereof, the Holder may convert it at any
time before the close of business on the date that is one business day before
the date fixed for such repurchase. The initial Conversion Price is $39.30 per
share of Common Stock, subject to adjustment in certain circumstances as set
forth in Section 10.6 of the Indenture. To determine the number of shares
issuable upon conversion of a Security, divide each $1,000 of the principal
amount to be converted by the Conversion Price in effect on the conversion date
and round the result to the nearest 1/100th share. The Company is not required
to issue fractional shares of Common Stock upon conversion and, instead, will
pay a cash amount as provided in Section 10.3 of the Indenture. Except as
provided in Article Ten of the Indenture, no payment or adjustment for the
principal of, premium, if any, interest on or liquidated damages with respect
to, the Securities or for dividends on any Common Stock will be made. If a
Holder surrenders a Security for conversion between the record date for the
payment of interest and the next interest payment date, such Security, when
surrendered for conversion, must be accompanied by payment of an amount equal to
the interest thereon which the registered Holder on such record date is to
receive. The following sentence does not apply in the case of such Security or
portions of such Security called for redemption or subject to repurchase
following a Change in Control during that period. A Security which the Holder
has elected to be repurchased may be converted only if the Holder withdraws its
election to have such Security repurchased in accordance with the terms of the
Indenture before the close of business on the business day prior to the
Repurchase Date.

                  To convert a Security a Holder must (1) complete and sign the
Conversion Notice, with appropriate signature guarantee, on the back of the
Security, (2) surrender the Security to a Conversion Agent, (3) furnish
appropriate endorsements and transfer documents if required by the Registrar or
Conversion Agent, (4) pay the amount of interest, if any, the Holder may be paid
as provided in the second to last sentence of the above paragraph and (5) pay
any transfer or similar tax if required. A Holder may convert a portion of a
Security if the portion is $1,000 principal amount or an integral multiple of
$1,000 principal amount.

                                      A-5

<PAGE>

                  Any shares issued upon conversion of a Security shall bear the
Private Placement Legend until after the expiration of the holding period
applicable to sales of Securities under Rule 144(k) of the Securities Act.

                  10.      Subordination. The Securities are subordinated in
right of payment, in the manner and to the extent set forth in the Indenture, to
the prior payment in full of all Senior Indebtedness. Each Holder by accepting
a Security agrees to such subordination and authorizes the Trustee to give it
effect.

                  11.      Denominations, Transfer, Exchange. The Securities are
in registered form without coupons in denominations of $1,000 principal amount
and whole multiples of $1,000 principal amount. The transfer of Securities may
be registered and Securities may be exchanged as provided in the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents. 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. The Registrar need not exchange or register the transfer
of any Security selected for redemption in whole or in part. Also, it need not
exchange or register the transfer of any Securities for a period of 10 Business
Days before the mailing of a notice of redemption of the Securities selected to
be redeemed.

                  12.      Persons Deemed Owners. The registered Holder of a
Security may be treated as the owner of such Security for all purposes.

                  13.      Merger or Consolidation. The Company shall not
consolidate with, or merge into any other Person, in a transaction in which the
Company is not the surviving corporation, or convey, transfer or lease its
properties and assets substantially as an entirety to, any Person unless, among
other things, the successor, if any, is a corporation organized under the laws
of the United States, any State thereof or the District of Columbia and such
corporation assumes by supplemental indenture all the obligations of the Company
under the Securities and the Indenture, and immediately after giving effect to
the transaction no Default or Event of Default shall have occurred and be
continuing.

                  Notwithstanding the foregoing, any Subsidiary of the Company
may consolidate with, merge into or transfer all or part of its properties and
assets to the Company or any other Subsidiary or Subsidiaries of the Company.

                  14.      Amendments, Supplements and Waivers. Subject to
certain exceptions, the Indenture or the Securities may be amended or
supplemented with the consent of the Holders of at least a majority in aggregate
principal amount of the Securities then outstanding, and any existing Default or
Event of Default may be waived with the consent of the Holders of a majority in
aggregate principal amount of the Securities then outstanding. Without notice to
or the consent of any Holder, the Indenture or the Securities may be amended or
supplemented, among other things, to cure any ambiguity, omission, defect or
inconsistency, to provide for uncertificated Securities in addition to
certificated Securities, to comply with Sections 5.1 and 10.7 of the Indenture
or to make any change that does not adversely affect the rights of any Holder.

                                      A-6

<PAGE>

                  15.      Defaults and Remedies. An Event of Default includes
the occurrence of any or the following: default in payment of the principal of
or any premium on the Securities when due; default for 30 days in payment of
interest on the Securities when due, provided that a failure to make any of the
first six scheduled interest payments on the Securities within three (3)
Business Days after the applicable interest payment dates will constitute an
Event of Default with no additional grace or cure periods; failure by the
Company to perform any other covenant in the Indenture for 60 days after receipt
of the notice to it required by the Indenture; certain events of bankruptcy or
insolvency; default in the payment of certain Indebtedness of the Company or any
of its Significant Subsidiaries, provided such default is not cured, waived or
rescinded within 30 days after receipt of the notice to it required by the
Indenture; and the Pledge Agreement shall cease to be in full force and effect
or enforceable in accordance with its terms. If any Event of Default occurs and
is continuing, the Trustee or the Holders of at least 25% in aggregate principal
amount of the Securities then outstanding may declare all the Securities to be
due and payable, subject to certain limitations contained in the Indenture.
Holders may not enforce the Indenture or the Securities except as provided in
the Indenture. The Trustee may require indemnity satisfactory to it before it
enforces the Indenture or the Securities. Subject to certain limitations,
Holders of a majority in principal amount of the Securities then outstanding may
direct the Trustee in its exercise of any trust or power. The Trustee may
withhold from Holders notice of any continuing Default or Event of Default
(except a Default or Event of Default in payment of principal or interest) if it
determines that withholding notice is in their interests. The Company must
furnish an annual compliance certificate to the Trustee.

                  16.      Registration Rights. The Holders are entitled to
shelf registration rights as set forth in the Registration Rights Agreement.
The Holders shall be entitled to receive liquidated damages in certain
circumstances, all as set forth in the Registration Rights Agreement.

                  17.      Trustee Dealings with Company. The Trustee under the
Indenture, or any banking institution serving as successor Trustee thereunder,
in its individual or any other capacity, may make loans to, accept deposits
from, and perform services for the Company or its Affiliates, and may otherwise
deal with the Company or its Affiliates, as if it were not Trustee.

                  18.      No Recourse Against Others. No past, present or
future director, officer, employee or shareholder, as such, of the Company shall
have any liability for any obligations of the Company under the Securities or
the Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. Each Holder by accepting a Security waives and
releases all such liability. The waiver and release are part of the
consideration for the issue of the Securities.

                  19.      Authentication. This Security shall not be valid
until authenticated by the manual signature of the Trustee or an authenticating
agent.

                  20.      Abbreviations. Customary abbreviations may be used in
the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN
ENT (= tenants by the entirety), JT TEN (= joint tenants with right of
survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A
(Uniform Gifts to Minors Act).

                                      A-7

<PAGE>

                  THE COMPANY WILL FURNISH TO ANY SECURITYHOLDER UPON WRITTEN
REQUEST AND WITHOUT CHARGE A COPY OF THE INDENTURE. REQUESTS MAY BE MADE TO:

                  SCIOS INC.
                  820 West Maude Avenue
                  Sunnyvale, California  94085

                  ATTENTION:  General Counsel

                                      A-8

<PAGE>

                             [FORM OF ASSIGNMENT]

I or we assign to

PLEASE INSERT SOCIAL SECURITY OR
OTHER IDENTIFYING NUMBER

_______________________________________________

________________________________________________________________________________
(please print or type name and address)

________________________________________________________________________________

________________________________________________________________________________
the within Security and all rights thereunder, and hereby irrevocably
constitutes and appoints

________________________________________________________________________________
attorney to transfer the Security on the books of the Company with full power of
substitution in the premises.

Dated:_________________    NOTICE:  The signature on this assignment must
                           correspond with the name as it appears upon the
                           face of the within Security in every particular
                           without alteration or enlargement or any change
                           whatsoever and be guaranteed by the endorser's bank
                           or broker.

Signature Guarantee:____________________________________________________________

                  (Signatures must be guaranteed by an "eligible guarantor
institution" meeting the requirements of the Registrar, which requirements
include membership or participation in the Security Transfer Agent Medallion
Program ("STAMP") or such other "signature guarantee program" as may be
determined by the Registrar in addition to, or in substitution for, STAMP, all
in accordance with the Securities Exchange Act of 1934, as amended.)

                  In connection with any transfer of this Security occurring
prior to the date which is the earlier of (i) the date of the declaration by the
Commission of the effectiveness of a registration statement under the Securities
Act of 1933, as amended (the "Securities Act") covering resales of this Security
(which effectiveness shall have been suspended or terminated at the date of the
transfer) and (ii) _________________ the undersigned confirms that it has not
utilized any general solicitation or general advertising in connection with
transfer:

                                      A-9

<PAGE>

                                   [Check One]

(1)      ____     to the Company or a Subsidiary thereof; or

(2)      ____     pursuant to and in compliance with Rule 144A under the
                  Securities Act of 1933, as amended; or

(3)      ____     to an institutional "accredited investor" (as defined in Rule
                  501(a)(1), (2), (3) or (7) under the Securities Act of 1933,
                  as amended) that has furnished to the Trustee a signed letter
                  containing certain representations and agreements (the form of
                  which letter can be obtained from the Trustee); or

(4)      ____     pursuant to the exemption from registration provided by Rule
                  144 under the Securities Act of 1933, as amended; or

(5)      ____     pursuant to an effective registration statement under the
                  Securities Act of 1933, as amended; or

(6)      ____     pursuant to another available exemption from the registration
                  statement requirements of the Securities Act of 1933, as
                  amended.

and unless the box below is checked, the undersigned confirms that such Security
is not being transferred to an "affiliate" of the Company as defined in Rule 144
under the Securities Act of 1933, as amended (an "Affiliate"):

                  [ ]      The transferee is an Affiliate of the Company.

(If the Security is transferred to an Affiliate, the restrictive legend must
remain on the Security for two years following the date of the transfer).

                  Unless one of the items is checked, the Trustee will refuse to
register any of the Securities evidenced by this certificate in the name of any
Person other than the registered Holder thereof; provided, however, that if item
(3), (4) or (6) is checked, the Company or the Trustee may require, prior to
registering any such transfer of the Securities, in their sole discretion, such
written legal opinions, certifications (including an investment letter in the
case of box (3)) and other information as the Trustee or the Company have
reasonably requested to confirm that such transfer is being made pursuant to an
exemption from, or in a transaction not subject to, the registration
requirements of the Securities Act of 1933, as amended.

                  If none of the foregoing items are checked, the Trustee or
Registrar shall not be obligated to register this Security in the name of any
Person other than the Holder hereof unless and until the conditions to any such
transfer of registration set forth herein and in Section 2.16 of the Indenture
shall have been satisfied.

Dated:_____________________________Signed:____________________________________
                                             (Sign exactly as name appears on
                                              the other side of this Security)
                                      A-10

<PAGE>

Signature Guarantee:____________________________________________________________

TO BE COMPLETED BY PURCHASER IF (2) ABOVE IS CHECKED

                  The undersigned represents and warrants that it is purchasing
this Security for its own account or an account with respect to which it
exercises sole investment discretion and that it and any such account is a
"qualified institutional buyer" within the meaning of Rule 144A under the
Securities Act of 1933, as amended, and is aware that the sale to it is being
made in reliance on Rule 144A and acknowledges that it has received such
information regarding the Company as the undersigned has requested pursuant to
Rule 144A or has determined transferor is relying upon the undersigned's
foregoing representations in order to claim the exemption from registration
provided by Rule 144A.

Dated: ________________________________       __________________________________
                                              NOTICE:   To be executed by an
                                                        executive officer

                                      A-11

<PAGE>

                                CONVERSION NOTICE

To convert this Security into Common Stock of the Company, check the box:

[ ]

To convert only part of this Security, state the principal amount to be
converted (must be in multiples of $1,000):

$_______________________________________________________________________________

If you want the stock certificate made out in another person's name, fill in the
form below:

________________________________________________________________________________
(Insert other person's soc. sec. or tax I.D. no.)

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
(Print or type other person's name, address and zip code)

________________________________________________________________

Date:__________________    Signature(s):_______________________________

                                            __________________________________
                                            (Signatures must be guaranteed by an
                                            "eligible guarantor institution"
                                            meeting the requirements of the
                                            Registrar, which requirements
                                            include membership or participation
                                            in the Security Transfer Agent
                                            Medallion Program ("STAMP") or such
                                            other "signature guarantee program"
                                            as may be determined by the
                                            Registrar in addition to, or in
                                            substitution for, STAMP, all in
                                            accordance with the Securities
                                            Exchange Act of 1934, as amended.)

                                      A-12

<PAGE>

       Signature(s) guaranteed by:______________________________________________
                                  (Signatures must be guaranteed by an "eligible
                                  guarantor institution" meeting the
                                  requirements of the Registrar, which
                                  requirements include membership or
                                  participation in the Security Transfer Agent
                                  Medallion Program ("STAMP") or such other
                                  "signature guarantee program" as may be
                                  determined by the Registrar in addition to, or
                                  in substitution for, STAMP, all in accordance
                                  with the Securities Exchange Act of 1934, as
                                  amended.)

                                      A-13

<PAGE>

                    OPTION OF HOLDER TO ELECT PURCHASE NOTICE

                  If you want to elect to have this Security purchased by the
Company pursuant to Section 3.8 of the Indenture, check the box: [ ]

                  If you want to elect to have only part of this Security
purchased by the Company pursuant to Section 3.8 of the Indenture, state the
principal amount:

                          $_______________________________________
                             (in an integral multiple of $1,000)

Date:______________________             Signature(s):___________________________

                                        ________________________________________
                                        (Sign exactly as your name(s) appear(s)
                                        on the other side of this Security)

Signature(s) guaranteed by:             _______________________________________
                                        (Signatures must be guaranteed by an
                                        "eligible guarantor institution" meeting
                                        the requirements of the Registrar, which
                                        requirements include membership or
                                        participation in the Security Transfer
                                        Agent Medallion Program ("STAMP") or
                                        such other "signature guarantee program"
                                        as may be determined by the Registrar in
                                        addition to, or in substitution for,
                                        STAMP, all in accordance with the
                                        Securities Exchange Act of 1934, as
                                        amended.)

                                      A-14

<PAGE>

                         SCHEDULE OF EXCHANGES OF SECURITIES/1/

         The following exchanges, redemptions, repurchases or conversion of a
part of this Global Security have been made:

<TABLE>
   <S>                            <C>                           <C>
   Principal Amount of this
   Global Security Following                                    Amount of Decrease in        Amount of Increase in
     Such Decrease Date of        Authorized Signatory of        Principal Amount of          Principal Amount of
    Exchange (or Increase)          Securities Custodian         this Global Security        this Global Security
    ----------------------          --------------------         --------------------        --------------------
</TABLE>

--------------------------
/1/  This schedule should be included only if the Security is a Global Security.

                                      A-15

<PAGE>

                                                                       EXHIBIT B
                                                                       ---------

                                 FORM OF LEGENDS

                           I. PRIVATE PLACEMENT LEGEND

                  Each Security issued under the Indenture shall bear a legend
(and any common stock issued upon conversion of such Security shall bear a
comparable legend) substantially in the following form:

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S.
         SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND,
         ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT AS SET FORTH BELOW. BY
         ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT IT IS A
         "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE
         SECURITIES ACT), (2) AGREES THAT IT WILL NOT WITHIN TWO YEARS AFTER THE
         ORIGINAL ISSUANCE OF THIS SECURITY RESELL OR OTHERWISE TRANSFER THIS
         SECURITY EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A
         QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE
         SECURITIES ACT, (C) PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED
         BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), (D) PURSUANT TO AN
         EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR (E)
         PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION
         REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF
         COUNSEL IF THE COMPANY SO REQUESTS) AND (3) AGREES THAT IT WILL GIVE TO
         EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE SUBSTANTIALLY
         TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THIS
         SECURITY WITHIN TWO YEARS AFTER THE ORIGINAL ISSUANCE OF THIS SECURITY
         (OTHER THAN A TRANSFER PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
         UNDER THE SECURITIES ACT), THE HOLDER MUST, PRIOR TO SUCH TRANSFER,
         FURNISH TO THE TRUSTEE AND THE COMPANY SUCH CERTIFICATIONS, LEGAL
         OPINIONS OR OTHER INFORMATION AS EITHER OF THEM MAY REASONABLY REQUIRE
         TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION
         FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
         OF THE SECURITIES ACT. THE INDENTURE CONTAINS A PROVISION REQUIRING THE
         TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS SECURITY IN
         VIOLATION OF THE FOREGOING RESTRICTIONS.

                                      B-1

<PAGE>

                            II. GLOBAL SECURITY LEGEND

                  Any Global Security authenticated and delivered hereunder
shall bear a legend (which would be in addition to any other legends required in
the case of a Restricted Security) in substantially the following form:

                  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 OF A DEPOSITARY OR A SUCCESSOR DEPOSITARY. THIS
         SECURITY IS NOT EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A
         PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE EXCEPT IN THE LIMITED
         CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS
         SECURITY (OTHER THAN A TRANSFER OF THIS SECURITY AS A WHOLE BY THE
         DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE
         DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY
         BE REGISTERED EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE
         INDENTURE.

                  UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
         REPRESENTATIVE OF THE DEPOSITARY TRUST COMPANY, A NEW YORK CORPORATION
         ("DTC"), 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 INASMUCH AS THE REGISTERED
         OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO
         TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF CEDE & CO. OR TO A
         SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS
         OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN
         ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN SECTION 2.16 OF THE
         INDENTURE.

                                      B-2

<PAGE>
                                                                       EXHIBIT C
                                                                       ---------

           Form of Notice of Transfer Pursuant to Registration Statement
           -------------------------------------------------------------

                                                                          [Date]

Scios Inc.
820 West Maude Avenue
Sunnyvale, California  94085

Wells Fargo Bank, National Association
45 Broadway, 12th Floor
New York, New York 10006

Attention: Corporate Trust Department

With a copy to:

Wells Fargo Bank, National Association
707 Wilshire Blvd., 17th Floor
Los Angeles, CA 90017

Attention:  Corporate Trust Department

                  Re:      Scios Inc. (the "Company")
                           5.50% Convertible Subordinated Notes Due 2009

Ladies and Gentlemen:

                  Please be advised that _____________ has transferred
$___________ aggregate principal amount of the Securities or __ shares of the
Company's common stock, $.0001 par value per share, issuable on conversion of
the Securities ("Stock") pursuant to an effective Shelf Registration Statement
on Form S-3 (File No. _________) filed by the Company.

                  We hereby certify that the prospectus delivery requirements,
if any, of the Securities Act of 1933 as amended, have been satisfied with
respect to the transfer described above and that the above-named beneficial
owner of the Securities or Stock is named as a "Selling Security Holder" in the
Prospectus dated _____________ or in amendments or supplements thereto, and that
the aggregate principal amount of the Securities, or number of shares of Stock
transferred are [a portion of] the Securities or Stock listed in such
Prospectus, as amended or supplemented, opposite such owner's name.

                                                   Very truly yours,

                                                   _____________________________
                                                              (Name)

                                      C-1<PAGE>

                                                                     EXHIBIT 4.2

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S.
         SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND,
         ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT AS SET FORTH BELOW. BY
         ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT IT IS A
         "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE
         SECURITIES ACT), (2) AGREES THAT IT WILL NOT WITHIN TWO YEARS AFTER THE
         ORIGINAL ISSUANCE OF THIS SECURITY RESELL OR OTHERWISE TRANSFER THIS
         SECURITY EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A
         QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE
         SECURITIES ACT, (C) PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED
         BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), (D) PURSUANT TO AN
         EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR (E)
         PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION
         REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF
         COUNSEL IF THE COMPANY SO REQUESTS) AND (3) AGREES THAT IT WILL GIVE TO
         EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE SUBSTANTIALLY
         TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THIS
         SECURITY WITHIN TWO YEARS AFTER THE ORIGINAL ISSUANCE OF THIS SECURITY
         (OTHER THAN A TRANSFER PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
         UNDER THE SECURITIES ACT), THE HOLDER MUST, PRIOR TO SUCH TRANSFER,
         FURNISH TO THE TRUSTEE AND THE COMPANY SUCH CERTIFICATIONS, LEGAL
         OPINIONS OR OTHER INFORMATION AS EITHER OF THEM MAY REASONABLY REQUIRE
         TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION
         FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
         OF THE SECURITIES ACT. THE INDENTURE CONTAINS A PROVISION REQUIRING THE
         TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS SECURITY IN
         VIOLATION OF THE FOREGOING RESTRICTIONS.

                  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 OF A DEPOSITARY OR A SUCCESSOR DEPOSITARY. THIS
         SECURITY IS NOT EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A
         PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE EXCEPT IN THE LIMITED
         CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS
         SECURITY (OTHER THAN A TRANSFER OF THIS SECURITY AS A WHOLE BY THE
         DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE
         DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY
         BE REGISTERED EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE
         INDENTURE.

                  UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED

                                        1

<PAGE>

         REPRESENTATIVE OF THE DEPOSITARY TRUST COMPANY, A NEW YORK CORPORATION
         ("DTC"), 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 INASMUCH AS THE REGISTERED
         OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO
         TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF CEDE & CO. OR TO A
         SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS
         OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN
         ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN SECTION 2.16 OF THE
         INDENTURE.

                                       2

<PAGE>

REGISTERED                    [Face of Security]
NUMBER 1                                                            $150,000,000

CUSIP 808905 AA 1                  SCIOS INC.

                  5.50% CONVERTIBLE SUBORDINATED NOTE DUE 2009

                  SCIOS INC., a Delaware corporation (herein called the
"Company"), for value received, hereby promises to pay to Cede & Co. or
registered assigns, the principal sum of ONE HUNDRED FIFTY MILLION DOLLARS
($150,000,000) on August 15, 2009, and to pay interest thereon as provided on
the reverse hereof on the principal sum, until the principal hereof and any
unpaid and accrued interest is paid or duly provided for. The right to payment
of principal, premium, if any, and interest is subordinated to the rights of
Senior Indebtedness as set forth in the Indenture referred to on the reverse
side hereof.

         Interest Payment Dates:  February 15 and August 15, with the first
payment to be made on February 15, 2003.

         Record Dates:  February 1 and August 1.

                                       3

<PAGE>

                  IN WITNESS WHEREOF, SCIOS INC. has caused this instrument to
be duly signed.

                                              SCIOS INC.

                                              By: /s/  David W. Gryska
                                                  -----------------------------
                                                  Name:  David W. Gryska
                                                  Title: Chief Financial
                                                         Officer
Dated:  August 5, 2002

TRUSTEE'S CERTIFICATE OF
     AUTHENTICATION
This is one of the Securities referred to
in the within-mentioned Indenture.

WELLS FARGO BANK, NATIONAL ASSOCIATION,
as Trustee

By:  /s/  Jeanie Mar
     ------------------------------------------
              Authorized Officer

                                       4

<PAGE>

                              [REVERSE OF SECURITY]

                                   SCIOS INC.

                  5.50% CONVERTIBLE SUBORDINATED NOTE DUE 2009

1.       Interest. Scios Inc., a Delaware corporation (the "Company"), promises
to pay interest on the principal amount of this Security at the rate per annum
shown above. The Company will pay interest semi-annually in arrears on February
15 and August 15 of each year, with the first payment to be made on February 15,
2003. Interest on the Securities will accrue on the principal amount from the
most recent date to which interest has been paid or duly provided for or, if no
interest has been paid, from August 5, 2002. Interest will be computed on the
basis of a 360-day year of twelve 30-day months.

         The Holder of this Note is entitled to the benefits of the Pledge
Agreement, dated as of August 5, 2002, by and among the Company, Wells Fargo
Bank, National Association, as the trustee (the "Trustee"), and Wells Fargo
Bank, National Association, as collateral agent for the Trustee and the Holders
from time to time (the "Collateral Agent") and pursuant to which the Company has
placed in the Pledge Account cash or Pledged Securities sufficient to provide
for the payment of the first six interest payments on the Securities.

2.       Maturity.  The Securities will mature on August 15, 2009 unless earlier
converted, redeemed or repurchased pursuant to the terms hereof and the
Indenture.

3.       Method of Payment. The Company will pay interest on the Securities
(except defaulted interest) to the Persons who are registered Holders of
Securities at the close of business on the record date set forth on the face of
this Security next preceding the applicable interest payment date except that
(i) interest payable upon redemption or repurchase, unless the date of
redemption or repurchase is an interest payment date, will be payable to the
Person to whom the principal is payable and (ii) in the case of any Security or
portion of any Security that is converted into Common Stock during the period
from, but excluding, a record date for any interest payment date to, but
excluding, that interest payment date either (A) if the Security, or portion of
the Security, has been called for redemption on a redemption date that occurs
during that period, or is to be repurchased on a Repurchase Date that occurs
during that period, the Company will not be required to pay interest on that
interest payment date in respect of any Security, or portion of any Security,
that is so redeemed or repurchased; or (B) if otherwise, any Security or portion
of any Security that is not called for redemption but is submitted for
conversion during that period must be accompanied by funds equal to the interest
payable on that interest payment date on the principal amount so converted.
Holders must surrender Securities to a Paying Agent to collect the principal
payments. The Company will pay the principal, premium, if any, and interest in
money of the United States that at the time of payment is legal tender.
Principal and interest may, at the Company's option, be paid either (i) by check
mailed to the address of the Person entitled to the interest as it appears in
the register kept by the Registrar (provided (a) payments to the Depositary will
be made by wire transfer of immediately available funds to the account of the
Depositary or its nominee and (b) a Holder with an aggregate principal amount of
Securities in excess of $2 million will, at the written election of the Holder,
filed on or before the relevant record date with the Trustee, be paid by wire
transfer

                                       5

<PAGE>

in immediately available funds); or (ii) by transfer to an account maintained by
that Person located in the United States.

4.       Paying Agent, Registrar, Conversion Agent.  Initially, the Trustee will
act as Paying Agent, Registrar and Conversion Agent. The Company may change any
Paying Agent, Registrar or Conversion Agent without notice. The Company may act
in any such capacity.

5.       Indenture. The Company issued the Securities under an Indenture, dated
as of August 5, 2002 (the "Indenture"), between the Company and the Trustee. The
terms of the Securities include those stated in the Indenture and those made
part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S.
Code [sec][sec]. 77aaa-77bbbb) (the "Act") as in effect on the date of the
Indenture. The Securities are subject to all such terms, and Holders are
referred to the Indenture and the Act for a statement of such terms. The
Securities are general unsecured subordinated obligations of the Company limited
to a maximum of $150,000,000 aggregate principal amount (plus such additional
amount (up to an aggregate of $175,000,000) purchased by the Initial Purchasers
pursuant to the option described in Section 2.2 of the Indenture), except as
otherwise provided in the Indenture (except for Securities issued in
substitution for destroyed, mutilated, lost or stolen Securities). Terms used
herein which are defined in the Indenture have the meanings assigned to them in
the Indenture.

6.       Optional Redemption by the Company. At any time on or after August 19,
2005, the Company may redeem the Securities on at least 30 days' notice as a
whole or, from time to time, in part at the following prices, expressed as a
percentage of the principal amount, together with accrued interest to, but
excluding, the date fixed for redemption:

<TABLE>
<CAPTION>
                                                                                                         Redemption
Period                                                                                                      Price
--------                                                                                                 -----------
<S>                                                                                                      <C>
Beginning August 19, 2005 and ending on August 14, 2006..........................................        103.143%
Beginning August 15, 2006 and ending on August 14, 2007..........................................        102.357%
Beginning August 15, 2007 and ending on August 14, 2008..........................................        101.571%
Beginning August 15, 2008 and ending on August 14, 2009..........................................        100.786%
</TABLE>

Any accrued interest becoming due on the date fixed for redemption will be
payable to the holders of record on the relevant record date of the Securities
being redeemed.

7.       Notice of Redemption. Notice of redemption pursuant to paragraph 6 will
be mailed at least 30 days before the redemption date to each Holder of
Securities to be redeemed at its registered address. Securities in denominations
larger than $1,000 principal amount may be redeemed in part but only in whole
multiples of $1,000 principal amount. On and after the redemption date interest
ceases to accrue on Securities or portions of them called for redemption.

8.       Repurchase at Option of Holder. Pursuant to Section 3.8 of the
Indenture, within 30 days after a Change in Control occurs, the Company is
required to give notice of the Change in Control to the Holders. Each Holder has
the right, at its option, to require the Company to repurchase all or any
portion of the Securities on a date fixed by the Company not more than 60 days
after the occurrence of a Change in Control. The Repurchase Price will be 100%
of the principal amount of the Securities submitted for repurchase, plus accrued
and unpaid interest to,

                                       6

<PAGE>

but excluding, the Repurchase Date. If a Repurchase Date is an interest payment
date, then the interest payable on that date will be paid to the holder of
record on the relevant record date. Subject to the conditions of Section 3.8 of
the Indenture, the Company may elect to pay the Repurchase Price (to the extent
not paid in cash) by delivering the number of shares of Common Stock equal to
(i) the Repurchase Price (to the extent not paid in cash) divided by (ii) 95% of
the average of the Closing Prices per share of the Common Stock for the five
Trading Days immediately preceding and including the third Trading Day preceding
the Repurchase Date.

9.       Conversion. A Holder of a Security may convert the principal of such
Security into Common Stock at any time after the date of original issuance of
the Security to the close of business on the business day prior to the close of
business on August 15, 2009, or (x) if the Security is called for redemption by
the Company, the Holder may convert it at any time before the close of business
on the date that is one business day before the date fixed for such redemption,
or (y) if the Security is to be repurchased by the Company pursuant to paragraph
8 hereof, the Holder may convert it at any time before the close of business on
the date that is one business day before the date fixed for such repurchase. The
initial Conversion Price is $39.30 per share of Common Stock, subject to
adjustment in certain circumstances as set forth in Section 10.6 of the
Indenture. To determine the number of shares issuable upon conversion of a
Security, divide each $1,000 of the principal amount to be converted by the
Conversion Price in effect on the conversion date and round the result to the
nearest 1/100th share. The Company is not required to issue fractional shares of
Common Stock upon conversion and, instead, will pay a cash amount as provided in
Section 10.3 of the Indenture. Except as provided in Article Ten of the
Indenture, no payment or adjustment for the principal of, premium, if any,
interest on or liquidated damages with respect to, the Securities or for
dividends on any Common Stock will be made. If a Holder surrenders a Security
for conversion between the record date for the payment of interest and the next
interest payment date, such Security, when surrendered for conversion, must be
accompanied by payment of an amount equal to the interest thereon which the
registered Holder on such record date is to receive. The following sentence does
not apply in the case of such Security or portions of such Security called for
redemption or subject to repurchase following a Change in Control during that
period. A Security which the Holder has elected to be repurchased may be
converted only if the Holder withdraws its election to have such Security
repurchased in accordance with the terms of the Indenture before the close of
business on the business day prior to the Repurchase Date.

         To convert a Security a Holder must (1) complete and sign the
Conversion Notice, with appropriate signature guarantee, on the back of the
Security, (2) surrender the Security to a Conversion Agent, (3) furnish
appropriate endorsements and transfer documents if required by the Registrar or
Conversion Agent, (4) pay the amount of interest, if any, the Holder may be paid
as provided in the second to last sentence of the above paragraph and (5) pay
any transfer or similar tax if required. A Holder may convert a portion of a
Security if the portion is $1,000 principal amount or an integral multiple of
$1,000 principal amount.

         Any shares issued upon conversion of a Security shall bear the Private
Placement Legend until after the expiration of the holding period applicable to
sales of Securities under Rule 144(k) of the Securities Act.

10.      Subordination.  The Securities are subordinated in right of payment, in
the manner and to

                                       7

<PAGE>

the extent set forth in the Indenture, to the prior payment in full of all
Senior Indebtedness. Each Holder by accepting a Security agrees to such
subordination and authorizes the Trustee to give it effect.

11.      Denominations, Transfer, Exchange. The Securities are in registered
form without coupons in denominations of $1,000 principal amount and whole
multiples of $1,000 principal amount. The transfer of Securities may be
registered and Securities may be exchanged as provided in the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents. 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. The Registrar need not exchange or register the transfer
of any Security selected for redemption in whole or in part. Also, it need not
exchange or register the transfer of any Securities for a period of 10 Business
Days before the mailing of a notice of redemption of the Securities selected to
be redeemed.

12.      Persons Deemed Owners.  The registered Holder of a Security may be
treated as the owner of such Security for all purposes.

13.      Merger or Consolidation. The Company shall not consolidate with, or
merge into any other Person, in a transaction in which the Company is not the
surviving corporation, or convey, transfer or lease its properties and assets
substantially as an entirety to, any Person unless, among other things, the
successor, if any, is a corporation organized under the laws of the United
States, any State thereof or the District of Columbia and such corporation
assumes by supplemental indenture all the obligations of the Company under the
Securities and the Indenture, and immediately after giving effect to the
transaction no Default or Event of Default shall have occurred and be
continuing.

         Notwithstanding the foregoing, any Subsidiary of the Company may
consolidate with, merge into or transfer all or part of its properties and
assets to the Company or any other Subsidiary or Subsidiaries of the Company.

14.      Amendments, Supplements and Waivers. Subject to certain exceptions, the
Indenture or the Securities may be amended or supplemented with the consent of
the Holders of at least a majority in aggregate principal amount of the
Securities then outstanding, and any existing Default or Event of Default may be
waived with the consent of the Holders of a majority in aggregate principal
amount of the Securities then outstanding. Without notice to or the consent of
any Holder, the Indenture or the Securities may be amended or supplemented,
among other things, to cure any ambiguity, omission, defect or inconsistency, to
provide for uncertificated Securities in addition to certificated Securities, to
comply with Sections 5.1 and 10.7 of the Indenture or to make any change that
does not adversely affect the rights of any Holder.

15.      Defaults and Remedies. An Event of Default includes the occurrence of
any or the following: default in payment of the principal of or any premium on
the Securities when due; default for 30 days in payment of interest on the
Securities when due, provided that a failure to make any of the first six
scheduled interest payments on the Securities within three (3) Business Days
after the applicable interest payment dates will constitute an Event of Default
with no additional grace or cure periods; failure by the Company to perform any
other covenant in the

                                       8

<PAGE>

Indenture for 60 days after receipt of the notice to it required by the
Indenture; certain events of bankruptcy or insolvency; default in the payment of
certain Indebtedness of the Company or any of its Significant Subsidiaries,
provided such default is not cured, waived or rescinded within 30 days after
receipt of the notice to it required by the Indenture; and the Pledge Agreement
shall cease to be in full force and effect or enforceable in accordance with its
terms. If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in aggregate principal amount of the Securities then
outstanding may declare all the Securities to be due and payable, subject to
certain limitations contained in the Indenture. Holders may not enforce the
Indenture or the Securities except as provided in the Indenture. The Trustee may
require indemnity satisfactory to it before it enforces the Indenture or the
Securities. Subject to certain limitations, Holders of a majority in principal
amount of the Securities then outstanding may direct the Trustee in its exercise
of any trust or power. The Trustee may withhold from Holders notice of any
continuing Default or Event of Default (except a Default or Event of Default in
payment of principal or interest) if it determines that withholding notice is in
their interests. The Company must furnish an annual compliance certificate to
the Trustee.

16.      Registration Rights.  The Holders are entitled to shelf registration
rights as set forth in the Registration Rights Agreement. The Holders shall be
entitled to receive liquidated damages in certain circumstances, all as set
forth in the Registration Rights Agreement.

17.      Trustee Dealings with Company. The Trustee under the Indenture, or any
banking institution serving as successor Trustee thereunder, in its individual
or any other capacity, may make loans to, accept deposits from, and perform
services for the Company or its Affiliates, and may otherwise deal with the
Company or its Affiliates, as if it were not Trustee.

18.      No Recourse Against Others. No past, present or future director,
officer, employee or shareholder, as such, of the Company shall have any
liability for any obligations of the Company under the Securities or the
Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. Each Holder by accepting a Security waives and
releases all such liability. The waiver and release are part of the
consideration for the issue of the Securities.

19.      Authentication.  This Security shall not be valid until authenticated
by the manual signature of the Trustee or an authenticating agent.

20.      Abbreviations. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entirety), JT TEN (= joint tenants with right of survivorship and
not as tenants in common), CUST (= Custodian), and U/G/M/A (Uniform Gifts to
Minors Act).

         THE COMPANY WILL FURNISH TO ANY SECURITYHOLDER UPON WRITTEN REQUEST AND
WITHOUT CHARGE A COPY OF THE INDENTURE. REQUESTS MAY BE MADE TO:

                  SCIOS INC.
                  820 West Maude Avenue
                  Sunnyvale, California  94085
                  ATTENTION:  General Counsel

                                       9

<PAGE>

                              [FORM OF ASSIGNMENT]

I or we assign to

PLEASE INSERT SOCIAL SECURITY OR
OTHER IDENTIFYING NUMBER

______________________________________

________________________________________________________________________________

(please print or type name and address)

________________________________________________________________________________

________________________________________________________________________________

the within Security and all rights thereunder, and hereby irrevocably
constitutes and appoints

________________________________________________________________________________

attorney to transfer the Security on the books of the Company with full power of
substitution in the premises.

Dated:_________________________        NOTICE: The signature on this assignment
                                       must correspond with the name as it
                                       appears upon the face of the within
                                       Security in every particular without
                                       alteration or enlargement or any change
                                       whatsoever and be guaranteed by the
                                       endorser's bank or broker.

Signature Guarantee: ___________________________________________________________

                  (Signatures must be guaranteed by an "eligible guarantor
institution" meeting the requirements of the Registrar, which requirements
include membership or participation in the Security Transfer Agent Medallion
Program ("STAMP") or such other "signature guarantee program" as may be
determined by the Registrar in addition to, or in substitution for, STAMP, all
in accordance with the Securities Exchange Act of 1934, as amended.)

                  In connection with any transfer of this Security occurring
prior to the date which is the earlier of (i) the date of the declaration by the
Commission of the effectiveness of a registration statement under the Securities
Act of 1933, as amended (the "Securities Act") covering resales of this Security
(which effectiveness shall have been suspended or terminated at the date of the
transfer) and (ii) _________________ the undersigned confirms that it has not
utilized any general solicitation or general advertising in connection with
transfer:

                                       10

<PAGE>

                                   [Check One]

(1)      ____     to the Company or a Subsidiary thereof; or

(2)      ____     pursuant to and in compliance with Rule 144A under the
                  Securities Act of 1933, as amended; or

(3)      ____     to an institutional "accredited investor" (as defined in Rule
                  501(a)(1), (2), (3) or (7) under the Securities Act of 1933,
                  as amended) that has furnished to the Trustee a signed letter
                  containing certain representations and agreements (the form of
                  which letter can be obtained from the Trustee); or

(4)      ____     pursuant to the exemption from registration provided by Rule
                  144 under the Securities Act of 1933, as amended; or

(5)      ____     pursuant to an effective registration statement under the
                  Securities Act of 1933, as amended; or

(6)      ____     pursuant to another available exemption from the registration
                  statement requirements of the Securities Act of 1933, as
                  amended.

and unless the box below is checked, the undersigned confirms that such Security
is not being transferred to an "affiliate" of the Company as defined in Rule 144
under the Securities Act of 1933, as amended (an "Affiliate"):

                  [ ]     The transferee is an Affiliate of the Company.

(If the Security is transferred to an Affiliate, the restrictive legend must
remain on the Security for two years following the date of the transfer).

                  Unless one of the items is checked, the Trustee will refuse to
register any of the Securities evidenced by this certificate in the name of any
Person other than the registered Holder thereof; provided, however, that if item
(3), (4) or (6) is checked, the Company or the Trustee may require, prior to
registering any such transfer of the Securities, in their sole discretion, such
written legal opinions, certifications (including an investment letter in the
case of box (3)) and other information as the Trustee or the Company have
reasonably requested to confirm that such transfer is being made pursuant to an
exemption from, or in a transaction not subject to, the registration
requirements of the Securities Act of 1933, as amended.

                  If none of the foregoing items are checked, the Trustee or
Registrar shall not be obligated to register this Security in the name of any
Person other than the Holder hereof unless and until the conditions to any such
transfer of registration set forth herein and in Section 2.16 of the Indenture
shall have been satisfied.

Dated: ________________________           Signed:_______________________________
                                                   (Sign exactly as name appears
                                                    on the other side of this
                                                    Security)

                                       11

<PAGE>

Signature Guarantee: ___________________________________________________________

TO BE COMPLETED BY PURCHASER IF (2) ABOVE IS CHECKED

                  The undersigned represents and warrants that it is purchasing
this Security for its own account or an account with respect to which it
exercises sole investment discretion and that it and any such account is a
"qualified institutional buyer" within the meaning of Rule 144A under the
Securities Act of 1933, as amended, and is aware that the sale to it is being
made in reliance on Rule 144A and acknowledges that it has received such
information regarding the Company as the undersigned has requested pursuant to
Rule 144A or has determined transferor is relying upon the undersigned's
foregoing representations in order to claim the exemption from registration
provided by Rule 144A.

Dated: ______________________________        ___________________________________
                                             NOTICE:  To be executed by an
                                                      executive officer

                                       12

<PAGE>

                                CONVERSION NOTICE

To convert this Security into Common Stock of the Company, check the box:

[ ]

To convert only part of this Security, state the principal amount to be
converted (must be in multiples of $1,000):

$_______________________________________________________________________________

If you want the stock certificate made out in another person's name, fill in the
form below:

________________________________________________________________________________
(Insert other person's soc. sec. or tax I.D. no.)

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
(Print or type other person's name, address and zip code)

_______________________________________________________

Date:____________________       Signature(s):______________________

                                               _________________________________
                                               (Signatures must be guaranteed by
                                               an "eligible guarantor
                                               institution" meeting the
                                               requirements of the Registrar,
                                               which requirements include
                                               membership or participation in
                                               the Security Transfer Agent
                                               Medallion Program ("STAMP") or
                                               such other "signature guarantee
                                               program" as may be determined by
                                               the Registrar in addition to, or
                                               in substitution for, STAMP, all
                                               in accordance with the Securities
                                               Exchange Act of 1934, as
                                               amended.)

                                       13

<PAGE>

Signature(s) guaranteed by:_____________________________________________________

                           (Signatures must be guaranteed by an "eligible
                           guarantor institution" meeting the requirements of
                           the Registrar, which requirements include membership
                           or participation in the Security Transfer Agent
                           Medallion Program ("STAMP") or such other "signature
                           guarantee program" as may be determined by the
                           Registrar in addition to, or in substitution for,
                           STAMP, all in accordance with the Securities Exchange
                           Act of 1934, as amended.)

                                       14

<PAGE>

                    OPTION OF HOLDER TO ELECT PURCHASE NOTICE

                  If you want to elect to have this Security purchased by the
Company pursuant to Section 3.8 of the Indenture, check the box: [ ]

                  If you want to elect to have only part of this Security
purchased by the Company pursuant to Section 3.8 of the Indenture, state the
principal amount:

                      $___________________________________
                       (in an integral multiple of $1,000)

Date:_________________________      Signature(s):_______________________________

                                    ____________________________________________
                                    (Sign exactly as your name(s) appear(s) on
                                    the other side of this Security)

Signature(s) guaranteed by:         ____________________________________________
                                    (Signatures must be guaranteed by an
                                    "eligible guarantor institution" meeting the
                                    requirements of the Registrar, which
                                    requirements include membership or
                                    participation in the Security Transfer Agent
                                    Medallion Program ("STAMP") or such other
                                    "signature guarantee program" as may be
                                    determined by the Registrar in addition to,
                                    or in substitution for, STAMP, all in
                                    accordance with the Securities Exchange Act
                                    of 1934, as amended.)

                                       15

<PAGE>

                       SCHEDULE OF EXCHANGES OF SECURITIES

         The following exchanges, redemptions, repurchases or conversion of a
part of this Global Security have been made:

<TABLE>
<S>                           <C>                            <C>                          <C>
Principal Amount of this
Global Security Following                                    Amount of Decrease in        Amount of Increase in
 Such Decrease Date of        Authorized Signatory of         Principal Amount of          Principal Amount of
 Exchange (or Increase)        Securities Custodian          this Global Security         this Global Security
 ----------------------        --------------------          --------------------         --------------------
</TABLE>

                                       16

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