Document:

Verdia Change of Control Agreement

 
Exhibit 10.4

VERDIA, INC. 
 
CHANGE OF CONTROL AGREEMENT 
 
This CHANGE OF
CONTROL AGREEMENT (the “Agreement”), dated February 24, 2003, is made by and between VERDIA, INC., a Delaware corporation (the “Company”), and
JOHN BEDBROOK (the “Executive”). 
 
WHEREAS, the Company considers it essential to the best interests of its stockholders to foster the continuous employment of key management personnel; 
 
WHEREAS, the Board of
Directors of the Company recognizes that the possibility of a Change of Control (as defined herein) exists and that such possibility, and the uncertainty and questions that it may raise among management, may result in the departure or distraction of
management personnel to the detriment of the Company and its stockholders; and 
 
WHEREAS, the Board has determined that appropriate steps should be taken to reinforce and encourage the continued attention and dedication of members of the
Company’s management, including the Executive, to their assigned duties without distraction in the face of potentially disturbing circumstances arising from the possibility of a Change of Control. 
 
NOW, THEREFORE, in
consideration of the premises and the mutual covenants herein contained, the Company and the Executive agree as follows: 
 
1.    Introduction; Purposes. 
 
(a) The purpose of this Agreement is to provide the Executive with protection of certain
benefits in case of a termination of his employment with the Company in connection with a Change of Control of the Company. 
 
(b) The Company, by means of the Agreement, seeks to (i) secure and/or retain the services of the Executive and (ii)
provide incentives for the Executive to exert maximum efforts for the success of the Company even in the face of a potential Change of Control of the Company. 
 
2.    Definitions. 
 
(a) “Accountants” has the meaning given thereto in Section 4. 
 
(b) “ADEA” has the meaning given
thereto in Section 5(c). 
 
(c)
“Agreement” means this Change of Control Agreement. 
 
(d) “Board” means the Board of Directors of the Company. 
 

 
(e) “Cause” means the Executive’s: (i) willful and continued failure to substantially perform the Executive’s duties with the Company (other than as a result of physical or mental disability) after a written
demand for substantial performance is deliver to the Executive by the Company, which demand specifically identifies the manner in which the Company believes that the Executive has not substantially performed the Executive’s duties and that has
not been cured within fifteen (15) days following receipt by the Executive of the written demand; (ii) commission of a felony (other than a traffic-related offense) that in the written determination of the Company is likely to cause or has caused
material injury to the Company’s business; (iii) dishonesty with respect to a significant matter relating to the Company’s business; or (iv) material breach of any agreement by and between the Executive and the Company, or by and between
the Company and its parent, Maxygen, Inc., which material breach has not been cured within fifteen (15) days following receipt by the Executive of written notice from the Company and/or Maxygen, Inc. identifying such material breach. 
 
(f) “Change of Control” means: (i) a
dissolution or liquidation of the Company; (ii) a sale of all or substantially all the assets of the Company; (iii) a merger or consolidation in which the Company is not the surviving corporation and in which beneficial ownership of securities of
the Company representing at least fifty percent (50%) of the combined voting power entitled to vote in the election of directors has changed; (iv) a reverse merger in which the Company is the surviving corporation but the shares of the common stock
of the Company outstanding immediately before the merger are converted by virtue of the merger into other property, whether in the form of securities, cash or otherwise, and in which beneficial ownership of securities of the Company representing at
least fifty percent (50%) of the combined voting power entitled to vote in the election of directors has changed; (v) an acquisition by any person or entity (including its affiliates) (excluding any employee benefit plan, or related trust, sponsored
or maintained by the Company or subsidiary of the Company or other entity controlled by the Company) of the beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act, or comparable successor rule) of securities of the
Company representing at least fifty percent (50%) of the combined voting power entitled to vote in the election of directors; or, (vi) in the event that the individuals who are members of the Incumbent Board cease for any reason to constitute at
least fifty percent (50%) of the Board. 
 
(g) “Code” means the Internal Revenue Code of 1986, as amended. 
 
(h) “Committee” means the Board or a committee appointed by the Board to administer this Agreement.

 
(i) “Company” means
Verdia, Inc., a Delaware corporation. 
 
(j) “Company-Paid Coverage” has the meaning given thereto in Section 3(a). 
 
(k) “Confidential Information, Secrecy and Invention Agreement” has the meaning given thereto in Section 5(b).

 

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(l) “Disability” means the Executive’s physical or mental disability that prevents the Executive from satisfactorily performing the normal duties and responsibilities of the Executive’s office in the good faith
determination of the Committee for a period of more than one hundred twenty (120) consecutive days. 
 
(m) “Effective Date” means the date first above written. 
 
(n) “Employee Agreement and Release”
has the meaning given thereto in Section 5(c). 
 
(o) “Exchange Act” means the Securities Exchange Act of 1934, as amended. 
 
(p) “Excise Tax” has the meaning given thereto in Section 4. 
 
(q) “Executive” means the person
identified in the introductory paragraph of this Agreement. 
 
(r) “Good Reason” means: (i) any material reduction of the Executive’s duties, authority or responsibilities relative to the Executive’s duties, authority, or responsibilities as in
effect immediately before such reduction, except if agreed to in writing by the Executive; (ii) a reduction by the Company in the base salary of the Executive, or of twenty-five percent (25%) or more in the Target Bonus opportunity of such
Executive, as in effect immediately before such reduction, except if agreed to in writing by the Executive; (iii) the relocation of the Executive to a facility or a location more than thirty (30) miles from the Executive’s then present business
location, except if agreed to in writing by the Executive; (iv) a material breach by the Company of any provision of this Agreement or (v) any failure of the Company to obtain the assumption of this Agreement by any successor or assign of the
Company. 
 
(s) “Incumbent
Board” means the individuals who, as of the Effective Date, are members of the Board. If the election, or nomination for election by the Company’s stockholders, of any new director is approved by a vote of at least fifty percent (50%) of
the Incumbent Board, such new director shall be considered as a member of the Incumbent Board. 
 
(t) “Target Bonus” means the Executive’s target bonus for the then current fiscal year, as set by the Board
or the appropriate committee thereof. 
 
3.    Severance Benefits in the Event of a Change of Control. 
 
(a) If within eighteen (18) months following the date of a Change of Control of the Company either (i) the Company
terminates the Executive’s employment other than for Cause, death or Disability or (ii) the Executive terminates his employment with the Company voluntarily with Good Reason, then in each case, subject to Section 4 and Section 5: (A) the
Executive shall be entitled to receive a lump sum payment equal to two times the Executive’s yearly base salary in effect on the date of termination (without 

 

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giving effect to any reduction in base salary subsequent to a Change of Control that constitutes Good Reason), (B) each of the
Executive’s outstanding Company stock options, all Company stock subject to repurchase, restricted stock awards and restricted stock purchases, and any Company options, stock subject to repurchase, awards or purchases held in the name of an
estate planning vehicle for the benefit of the Executive or his immediate family, shall have their vesting and exercisability schedule accelerated in full (or, as applicable, the corresponding repurchase right shall lapse in full) as of the date of
termination; and (C) if on the date of termination the Executive is covered by any Company-paid health, disability, accident and/or life insurance plans or programs, the Company shall provide to the Executive benefits substantially similar to those
that the Executive was receiving immediately prior to the date of termination (the “Company-Paid Coverage”). If such coverage included the Executive’s spouse and/or dependents immediately prior to the date of termination, such spouse
and/or dependents shall also be covered at Company expense. Company-Paid Coverage shall continue until the earlier of (x) two (2) years from the date of termination, or (y) the date that the Executive and his or her spouse and/or dependents become
covered under another employer’s health, disability, accident and/or life insurance plans or programs that provides the Executive and his or her spouse and/or dependents with comparable benefits and levels of coverage. 
 
(b) If within eighteen (18) months following
the date of a Change of Control of the Company the Executive’s employment with the Company is terminated as a result of death or Disability, then in each case, subject to Section 4 and Section 5: (i) each of the Executive’s outstanding
Company stock options, all Company stock subject to repurchase, restricted stock awards and restricted stock purchases, and any Company options, stock subject to repurchase, awards or purchases held in the name of an estate planning vehicle for the
benefit of the Executive or his immediate family, shall have their vesting and exercisability schedule accelerated such that vesting (or, as applicable, the corresponding repurchase right lapsing) shall occur as if the vesting (or lapsing) had
occurred on a monthly basis from the last date of vesting (or lapse) to the date of termination; and (ii) the Company will provide the Executive with health, disability, accident and/or life insurance benefits as described in Section 3(a)(iii).

 
(c) In no event shall the
Executive be obligated to seek other employment or take any other action to mitigate the amounts payable to the Executive under this Agreement. 
 
(d) The Executive’s employment shall be deemed to have been terminated following a Change of Control by the Company
without Cause or by the Executive with Good Reason if the Executive’s employment is terminated prior to a Change of Control without Cause at the direction of a person who has entered into an agreement with the Company the consummation of which
will constitute a Change of Control or if the Executive terminates his employment with Good Reason prior to a Change of Control if the circumstances or event that constitutes Good Reason occurs at the direction of such person. 
 

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4.    Parachute Payments; Excise Tax. 
 
In the event that the severance, acceleration of stock options and other benefits payable to the Executive as a result of a Change of Control of the Company (i) constitute “parachute
payments” within the meaning of Section 280G (as it may be amended or replaced) of the Code and (ii) but for this Section 4, would be subject to the excise tax imposed by Section 4999 (as it may be amended or replaced) of the Code (the
“Excise Tax”), then the Executive’s benefits payable in connection therewith shall be either 
 
(a) delivered in full, or 
 
(b) delivered as to such lesser extent that would result in no portion of such benefits being subject to the Excise Tax,

 
whichever of the foregoing amounts, taking into account the
applicable federal, state and local income taxes and the Excise Tax, results in the receipt by the Executive on an after-tax basis, of the greatest amount of benefits, notwithstanding that all or some portion of such benefits may be taxable under
the Excise Tax. Unless the Company and the Executive otherwise agree in writing, any determination required under this Section 4 shall be made in writing in good faith by the outside accounting firm responsible for auditing the Company’s
financial records (the “Accountants”). In the event of a reduction in benefits hereunder, the Executive shall be given the choice of which benefits to reduce. For purposes of making the calculations required by this Section 4, the
Accountants may make reasonable assumptions and approximations concerning applicable taxes and may rely on reasonable, good faith interpretations concerning the application of the Code. 
 
The Company and the Executive shall furnish to the Accountants such information and documents as the
Accountants may reasonably request in order to make a determination under this Section 4. The Company shall bear all costs the Accountants may reasonably incur in connection with any calculations contemplated by this Section 4. 
 
5.    Limitations and Conditions on
Benefits. 
 
The benefits and payments provided
under this Agreement shall be subject to the following terms and limitations: 
 
(a) Withholding Taxes. The Company shall withhold required federal, state and local income and employment taxes from any payments hereunder. 
 
(b) Confidential Information, Secrecy and
Invention Agreement Prior to Receipt of Benefits. The Executive shall have executed and delivered to the Company a standard form of the Company’s confidential information, secrecy and invention agreement, a copy of the current form of which
is attached as Exhibit A (the “Confidential Information, Secrecy and Invention Agreement”), prior to the receipt or provision of any benefits (including the acceleration benefits) under this Agreement. Additionally, the Executive agrees
that all documents, records, apparatus, equipment and other physical property that is furnished to or obtained by the Executive in the course of his employment 

 

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with the Company (or Maxygen, Inc.) shall be and shall remain the sole property of the Company (or as applicable, Maxygen, Inc.). The
Executive agrees not to make or retain copies, reproductions or summaries of any such property, except as otherwise necessary while acting in the normal course of business. In the event of any material breach by the Executive of the Confidential
Information, Secrecy and Invention Agreement that is not cured within thirty (30) days of notice of such breach to the Executive, all benefits payable under Section 4 of this Agreement shall immediately terminate. 
 
(c) Employee Agreement and Release Prior to
Receipt of Benefits. If the Executive’s employment with the Company terminates involuntarily other than for Cause, death or Disability, or the Executive terminates his employment with the Company voluntarily with Good Reason, then prior to,
and as a condition of the receipt of any benefits (including the acceleration benefits) under this Agreement on account of such termination, the Executive shall, as of the date of such termination, execute an employee agreement and release in the
form attached as Exhibit B (the “Employee Agreement and Release”) prior to receipt of benefits. Such Employee Agreement and Release shall specifically relate to all the Executive’s rights and claims in existence at the time of such
execution and shall confirm the Executive’s obligations under the Company’s standard form of Confidential Information, Secrecy and Invention Agreement. If and only if the Executive is covered by the federal Age Discrimination in Employment
Act of 1967, as amended (“ADEA”) (currently all those 40 years of age or over on the date of termination), the Executive has twenty-one (21) days to consider whether to execute such Employee Agreement and Release and the Executive may
revoke such Employee Agreement and Release within seven (7) days after execution of such Employee Agreement and Release. In the event the Executive is covered by ADEA and does not execute such Employee Agreement and Release within the twenty-one
(21) days specified above, or if the Executive revokes such Employee Agreement and Release within the seven (7) day period specified above, no benefits (including the acceleration benefits) under Section 3 of this Agreement shall be payable or made
available to the Executive on account of a termination. 
 
6.    Termination. Prior to a Change of Control of the Company, this Agreement shall automatically terminate on the date the Executive ceases to be an executive officer of the Company, as evidenced by
action of the Board removing the Executive as an executive officer or otherwise; provided, however, that if the Executive ceases to be an executive officer prior to a Change of Control at the direction of a person who has entered into an agreement
with the Company the consummation of which will constitute a Change of Control, this Agreement shall not terminate due to the change in status of the Executive. 
 
7.    At-Will Employment. The Company and the Executive acknowledge that the
Executive’s employment is and shall continue to be at-will, as defined under applicable law. This Agreement shall not be construed as creating an express or implied contract of employment between the Executive and the Company. The Executive
shall not have any right to be retained in the employment of the Company. 
 

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8.    Notices. Any notice provided under this Agreement shall be in writing and shall be deemed to have been effectively given (i) upon receipt when delivered personally, (ii) one day after sending when
sent by express mail service (such as Federal Express), or (iii) five (5) days after sending when sent by regular mail to the following address: 
 
In the case of the Company: 
 
Maxygen, Inc. 
515 Galveston Drive 
Redwood City, CA 94063 
Attn: General Counsel 
 
In the case of the Executive: 
 
John Bedbrook 
160 La Salle Avenue 
Piedmont, CA 94610 
 
or to such other address as the Company or the Executive hereafter designates
by written notice in accordance with this Section 8. 
 
9.    Litigation/Arbitration Expenses. Reasonable litigation and/or arbitration costs and expenses shall be paid by the Company, win or lose, in connection with any dispute between the Company (and its
successors) and the Executive concerning this Agreement; provided, however, that if the litigation or arbitration is found to have been commenced in bad faith by the Executive, the Executive shall bear all of his own costs and expenses in connection
with such litigation or arbitration. 
 
10.    Successors and Assigns. This Agreement is intended to bind and inure to the benefit of and be enforceable by the Executive, and the Company, and any surviving entity resulting from a Change of
Control and upon any other person who is a successor by merger, acquisition, consolidation or otherwise to the business formerly carried on by the Company, and their respective successors, assigns, heirs, executors and administrators, without regard
to whether or not such person actively assumes any rights or duties hereunder; provided, however, that the Executive may not assign any duties hereunder without the prior written consent of the Company. 
 
11.    Miscellaneous. 
 
(a) No provision of this Agreement may be
modified, waived or discharged unless such waiver, modification or discharge is agreed to in writing by each of the parties. 
 
(b) No agreements or representations, oral or otherwise, express or implied, with respect to the subject matter hereof
have been made by either party that are not expressly set forth in this Agreement. 
 

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(c) The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement, which shall remain in full force and effect. 
 
12.    Governing Law. This
Agreement shall be governed by, and construed in accordance with, the laws of the State of California, regardless of the law that might be applied under applicable principles of conflicts of law. 
 

	 VERDIA, INC.

	
	 By:
	 	 /s/    Lawrence W. Briscoe

	 	 	 Lawrence W. Briscoe

	 	 	 Chief Financial Officer

	
	 THE EXECUTIVE

	
	 /s/    John Bedbrook

	 John Bedbrook

 

8<PAGE>

                                                                     Exhibit 4.4

                            CELL THERAPEUTICS, INC.,
                                   as Issuer

            STATE STREET BANK AND TRUST COMPANY OF CALIFORNIA, N.A.,
                        a national banking association,
                                   as Trustee

                                   INDENTURE

                         Dated as of December 20, 2002

         5.75% CONVERTIBLE SENIOR SUBORDINATED NOTES DUE JUNE 15, 2008

<PAGE>

                                TABLE OF CONTENTS

                                                                            PAGE
                                                                            ----

ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION........    1

     SECTION 1.1   Definitions.............................................    1
     SECTION 1.2   Compliance Certificates and Opinions....................   11
     SECTION 1.3   Form of Documents Delivered to the Trustee..............   12
     SECTION 1.4   Acts of Holders of Securities...........................   12
     SECTION 1.5   Notices, Etc., to Trustee and Company...................   14
     SECTION 1.6   Notice to Holders of Securities; Waiver.................   15
     SECTION 1.7   Effect of Headings and Table of Contents................   15
     SECTION 1.8   Successors and Assigns..................................   15
     SECTION 1.9   Separability Clause.....................................   16
     SECTION 1.10  Benefits of Indenture...................................   16
     SECTION 1.11  Governing Law...........................................   16
     SECTION 1.12  Legal Holidays..........................................   16
     SECTION 1.13  Conflict with Trust Indenture Act.......................   16
     SECTION 1.14  Counterparts............................................   17

ARTICLE TWO THE SECURITIES.................................................   17

     SECTION 2.1   Form Generally..........................................   17
     SECTION 2.2   Title and Terms.........................................   17
     SECTION 2.3   Denominations...........................................   18
     SECTION 2.4   Execution, Authentication, Delivery and Dating..........   18
     SECTION 2.5   Global Securities; Temporary Securities.................   19
     SECTION 2.6   Registration, Registration of Transfer and Exchange;
                   Restrictions on Transfer................................   21
     SECTION 2.7   Mutilated, Destroyed, Lost or Stolen Securities.........   22
     SECTION 2.8   Payment of Interest; Interest Rights Preserved..........   23
     SECTION 2.9   Persons Deemed Owners...................................   24
     SECTION 2.10  Cancellation............................................   24
     SECTION 2.11  Computation of Interest.................................   24
     SECTION 2.12  CUSIP Numbers...........................................   24

ARTICLE THREE SATISFACTION AND DISCHARGE...................................   25

     SECTION 3.1   Satisfaction and Discharge of Indenture.................   25
     SECTION 3.2   Application of Trust Money..............................   26

ARTICLE FOUR REMEDIES......................................................   26

     SECTION 4.1   Events of Default.......................................   26
     SECTION 4.2   Acceleration of Maturity; Rescission and Annulment......   28
     SECTION 4.3   Collection of Indebtedness and Suits for Enforcement
                   by Trustee..............................................   28
     SECTION 4.4   Trustee May File Proofs of Claim........................   29

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                                TABLE OF CONTENTS
                                   (Continued)

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     SECTION 4.5   Trustee May Enforce Claims without Possession of
                   Securities..............................................   30
     SECTION 4.6   Application of Money Collected..........................   30
     SECTION 4.7   Limitation on Suits.....................................   30
     SECTION 4.8   Unconditional Right of Holders to Receive Principal,
                   Premium and Interest and to Convert.....................   31
     SECTION 4.9   Restoration of Rights and Remedies......................   31
     SECTION 4.10  Rights and Remedies Cumulative..........................   31
     SECTION 4.11  Delay or Omission Not Waiver............................   32
     SECTION 4.12  Control by Holders of Securities........................   32
     SECTION 4.13  Waiver of Past Defaults.................................   32
     SECTION 4.14  Undertaking for Costs...................................   32
     SECTION 4.15  Waiver of Stay, Usury or Extension Laws.................   33

ARTICLE FIVE THE TRUSTEE...................................................   33

     SECTION 5.1   Certain Duties and Responsibilities.....................   33
     SECTION 5.2   Notice of Defaults......................................   34
     SECTION 5.3   Certain Rights of Trustee...............................   35
     SECTION 5.4   Not Responsible for Recitals or Issuance of Securities..   36
     SECTION 5.5   May Hold Securities, Act as Trustee under Other
                   Indentures..............................................   36
     SECTION 5.6   Money Held in Trust.....................................   36
     SECTION 5.7   Compensation and Reimbursement..........................   36
     SECTION 5.8   Corporate Trustee Required; Eligibility.................   37
     SECTION 5.9   Resignation and Removal; Appointment of Successor.......   37
     SECTION 5.10  Acceptance of Appointment by Successor..................   38
     SECTION 5.11  Merger, Conversion, Consolidation or Succession to
                   Business................................................   39
     SECTION 5.12  Authenticating Agents...................................   39
     SECTION 5.13  Disqualification; Conflicting Interests.................   40
     SECTION 5.14  Preferential Collection of Claims Against Company.......   41

ARTICLE SIX CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE...........   41

     SECTION 6.1   Company May Consolidate, Etc., Only on Certain Terms....   41
     SECTION 6.2   Successor Substituted...................................   41

ARTICLE SEVEN SUPPLEMENTAL INDENTURES......................................   42

     SECTION 7.1   Supplemental Indentures without Consent of Holders of
                   Securities..............................................   42
     SECTION 7.2   Supplemental Indentures with Consent of Holders of
                   Securities..............................................   43
     SECTION 7.3   Execution of Supplemental Indentures....................   44
     SECTION 7.4   Effect of Supplemental Indentures.......................   44
     SECTION 7.5   Reference in Securities to Supplemental Indentures......   44
     SECTION 7.6   Notice of Supplemental Indentures.......................   44

ARTICLE EIGHT COVENANTS....................................................   45

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                                TABLE OF CONTENTS
                                   (Continued)

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                                                                            ----

     SECTION 8.1   Payment of Principal, Premium and Interest..............   45
     SECTION 8.2   Maintenance of Offices or Agencies......................   45
     SECTION 8.3   Money for Security Payments to Be Held in Trust.........   46
     SECTION 8.4   Existence...............................................   47
     SECTION 8.5   Statement by Officers as to Default.....................   47
     SECTION 8.6   Delivery of Certain Information.........................   47

ARTICLE NINE REDEMPTION OF SECURITIES......................................   48

     SECTION 9.1   Right of Redemption.....................................   48
     SECTION 9.2   Applicability of Article................................   48
     SECTION 9.3   Election to Redeem; Notice to Trustee...................   48
     SECTION 9.4   Selection by Trustee of Securities to Be Redeemed.......   48
     SECTION 9.5   Notice of Redemption....................................   49
     SECTION 9.6   Deposit of Redemption Price.............................   49
     SECTION 9.7   Securities Payable on Redemption Date...................   50
     SECTION 9.8   Securities Redeemed in Part.............................   50
     SECTION 9.9   Conversion Arrangement on Call for Redemption...........   50

ARTICLE TEN CONVERSION OF SECURITIES.......................................   51

     SECTION 10.1  Conversion Privilege and Conversion Rate................   51
     SECTION 10.2  Exercise of Conversion Privilege........................   52
     SECTION 10.3  Fractions of Shares.....................................   53
     SECTION 10.4  Adjustment of Conversion Rate...........................   53
     SECTION 10.5  Notice of Adjustments of Conversion Rate................   58
     SECTION 10.6  Notice of Certain Corporate Action......................   59
     SECTION 10.7  Company to Reserve Common Stock.........................   60
     SECTION 10.8  Taxes on Conversions....................................   60
     SECTION 10.9  Covenant as to Common Stock.............................   60
     SECTION 10.10 Cancellation of Converted Securities....................   60
     SECTION 10.11 Provision in Case of Consolidation, Merger or Sale of
                   Assets..................................................   60
     SECTION 10.12 Responsibility of Trustee for Conversion Provisions.....   61

ARTICLE ELEVEN SUBORDINATION OF SECURITIES.................................   62

     SECTION 11.1  Securities Subordinate to Senior Debt...................   62
     SECTION 11.2  No Payments in Certain Circumstances; Payment Over of
                   Proceeds Upon Dissolution, Etc..........................   62
     SECTION 11.3  Trustee to Effectuate Subordination.....................   64
     SECTION 11.4  No Waiver of Subordination Provisions...................   64
     SECTION 11.5  Notice to Trustee.......................................   65
     SECTION 11.6  Reliance on Judicial Order or Certificate of
                   Liquidating Agent.......................................   65
     SECTION 11.7  Trustee Not Fiduciary for Holders of Senior Debt........   66

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                                TABLE OF CONTENTS
                                   (Continued)

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     SECTION 11.8  Reliance by Holders of Senior Debt on Subordination
                   Provisions..............................................   66
     SECTION 11.9  Rights of Trustee as Holder of Senior Debt;
                   Preservation of Trustee's Rights........................   66
     SECTION 11.10 Article Applicable to Paying Agents.....................   66
     SECTION 11.11 Certain Conversions and Repurchases Deemed Payment......   67

ARTICLE TWELVE REPURCHASE OF SECURITIES AT THE OPTION OF THE HOLDER UPON
A CHANGE IN CONTROL........................................................   67

     SECTION 12.1  Right to Require Repurchase.............................   67
     SECTION 12.2  Conditions to the Company's Election to Pay the
                   Repurchase Price in Common Stock........................   68
     SECTION 12.3  Notices; Method of Exercising Repurchase Right, Etc.....   69

ARTICLE THIRTEEN HOLDERS LISTS AND REPORTS BY TRUSTEE AND COMPANY;
NON-RECOURSE...............................................................   71

     SECTION 13.1  Company to Furnish Trustee Names and Addresses of
                   Holders.................................................   71
     SECTION 13.2  Preservation of Information.............................   72
     SECTION 13.3  No Recourse Against Others..............................   72
     SECTION 13.4  Reports by Trustee......................................   72
     SECTION 13.5  Reports by Company......................................   73

                                      -iv-

<PAGE>

     Reconciliation and Tie between Trust Indenture Act of 1939, as amended, and
     Indenture, dated as of December 20, 2002.

Section 310    (a)(1)...........................................             5.8
               (a)(2)...........................................             5.8
               (a)(3)...........................................  Not Applicable
               (a)(4)...........................................  Not Applicable
               (b).............................................. 5.9, 5.10, 5.13
Section 3.11   (a)..............................................            5.14
               (b)..............................................            5.14
Section 312    (a)..............................................   13.1, 13.2(a)
               (b)..............................................         13.2(b)
               (c)..............................................         13.2(c)
Section 313    (a)..............................................         13.4(a)
               (b)..............................................         13.4(a)
               (c)..............................................         13.4(a)
               (d)..............................................         13.4(b)
Section 314    (a)..............................................            13.5
               (a)(4)...........................................             8.5
               (b)..............................................  Not Applicable
               (c)(1)...........................................             1.2
               (c)(2)...........................................             1.2
               (c)(3)...........................................  Not Applicable
               (d)..............................................  Not Applicable
               (e)..............................................             1.2
Section 315    (a)..............................................        5.1, 5.3
               (b)..............................................             5.2
               (c)..............................................             5.1
               (d)..............................................             5.1
               (d)(1)...........................................       5.1(c)(1)
               (d)(2)...........................................       5.1(c)(2)
               (d)(3)...........................................       5.1(c)(3)
               (e)..............................................            4.14
Section 316    (a)..............................................      4.12, 4.13
               (a)(1)(A)........................................            4.12
               (a)(1)(B)........................................            4.13
               (a)(2)...........................................  Not Applicable
               (b)..............................................             4.8
               (c)..............................................          1.4(e)
Section 317    (a)(1)...........................................             4.3
               (a)(2)...........................................             4.4
               (b)..............................................             8.3
Section 318    (a)..............................................            1.13

     NOTE:  This reconciliation and tie shall not, for any purpose, be deemed to
            be a part of the Indenture.

<PAGE>

          INDENTURE, dated as of December 20, 2002, between Cell Therapeutics,
Inc., a corporation duly organized and existing under the laws of the State of
Washington, having its principal office at 501 Elliott Avenue West, Suite 400,
Seattle, Washington 98119 (herein called the "Company"), and State Street Bank
and Trust Company of California, N.A., a national banking association, as
Trustee hereunder (herein called the "Trustee").

                             RECITALS OF THE COMPANY

          The Company has duly authorized the creation of an issue of its 5.75%
Convertible Senior Subordinated Notes due June 15, 2008 (herein called the
"Securities"), of substantially the tenor and amount hereinafter set forth, and
to provide therefor the Company has duly authorized the execution and delivery
of this Indenture.

          All things necessary to make the Securities, when the Securities are
executed by the Company and authenticated and delivered hereunder, the valid
obligations of the Company and to make this Indenture a valid agreement of the
Company, in accordance with their and its terms, have been done. Further, all
things necessary to duly authorize the issuance of shares of common stock of the
Company issuable upon the conversion of the Securities, and to duly reserve for
issuance the number of shares of Common Stock issuable upon such conversion,
have been done.

          NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

          SECTION 1.1    Definitions.

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

               (a)  the terms defined in this Article have the meanings assigned
to them in this Article and include the plural as well as the singular;

               (b)  all accounting terms not otherwise defined herein have the
meanings assigned to them in accordance with generally accepted accounting
principles in the United States; and

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

<PAGE>

          "Act," when used with respect to any Holder of a Security, has the
meaning specified in Section 1.4.

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

          "aggregate current market price" has the meaning specified in Section
10.4(e).

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

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

          "Average Sales Price Per Share" means, with respect to the Common
Stock of the Company, for any day, (1) the average of the high and low sales
price per share regular way on a national securities exchange or, (2) if the
Common Stock is not listed on a national securities exchange, the average of the
high and low sales price per share regular way on The Nasdaq National Market, or
(3) if the Common Stock is not quoted on The Nasdaq National Market or listed or
admitted to trading on any national securities exchange, the average of the high
and low sales prices in the over-the-counter market as furnished by any New York
Stock Exchange member firm selected from time to time by the Company for that
purpose.

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

          "Board Resolution" means a resolution duly adopted by the Board of
Directors, a copy of which, 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, shall have been
delivered to the Trustee.

          "Business Day," when used with respect to any Place of Payment, Place
of Conversion or any other place, as the case may be, means each Monday,
Tuesday, Wednesday, Thursday and Friday that is not a day on which banking
institutions in such Place of Payment, Place of Conversion or other place, as
the case may be, are authorized or obligated by law or executive order to close;
provided, however, that a day on which banking institutions in New York, New
York are authorized or obligated by law or executive order to close shall not be
a Business Day for purposes of Section 9.6 or Section 10.5.

                                                                             -2-

<PAGE>

          "Cash Equivalents" means (1) securities issued or directly and fully
guaranteed or insured by the United States government or any agency or
instrumentality thereof (provided that the full faith and credit of the United
States is pledged in support thereof) having maturities of not more than six
months from the date of acquisition, (2) certificates of deposit and eurodollar
time deposits with maturities of six months or less from the date of
acquisition, bankers' acceptances with maturities not exceeding six months and
overnight bank deposits, in each case with any domestic commercial bank having
capital and surplus in excess of $500 million and a Thompson Bank Watch Rating
of "B" or better, (3) repurchase obligations with a term of not more than seven
days for underlying securities of the types described in clause (1) above
entered into with any financial institution meeting the qualifications specified
in clause (2) above, (4) commercial paper having the highest rating obtainable
from Moody's Investors Service, Inc. or Standard & Poor's Ratings Services and
in each case maturing within six months after the date of acquisition and (5)
money market funds at least 95% of the assets of which constitute Cash
Equivalents of the kinds described in clauses (1)-(4) of this definition.

          "Change in Control" means the occurrence at any time, after the
original issuance of the Securities, of any of the following events:

          (1)  the acquisition by any Person (including any syndicated group
that would be deemed to be a "person" under Section 13(d)(3) of the Exchange
Act) of beneficial ownership, directly or indirectly, through a purchase, merger
or other acquisition transaction or series of transactions, of shares of capital
stock of the Company entitling such Person to exercise more than 50% of the
total voting power of all shares of capital stock of the Company entitled to
vote generally in the elections of directors, other than any such acquisition by
the Company, any Subsidiary or any employee benefit plan of the Company; or

          (2)  any Person shall succeed in having sufficient of its nominees
(who are not supported by a majority of the then current Board of Directors of
the Company) elected to the Board of Directors of the Company such that such
nominees, when added to any existing directors remaining on the Board of
Directors of the Company after such election who are Affiliates of or acting in
concert with any such Person, shall constitute a majority of the Board of
Directors of the Company; or

          (3)  any consolidation or merger of the Company with or into any other
Person, or any merger of another Person with or into the Company (other than (A)
a merger (i) that does not result in any reclassification, conversion, exchange
or cancellation of outstanding shares of the Company's capital stock and (ii)
pursuant to which holders of Common Stock immediately prior to such transaction
have, directly or indirectly, 50% or more of the total voting power of all
shares of capital stock or other ownership interests entitled to vote generally
in the election of directors of the continuing or surviving Person immediately
after such transaction and (B) any merger that is effected solely to change the
jurisdiction of incorporation of the Company and results in a reclassification,
conversion or exchange of outstanding shares of Common Stock solely into shares
of common stock of the Company or another Person); or

                                                                             -3-

<PAGE>

          (4)  any conveyance, transfer, sale, lease or other disposition of all
or substantially all of the Company's assets to another Person;

provided, however, that a Change in Control shall not be deemed to have occurred
if the Average Sales Price Per Share on any five Trading Days within (A) the
period of 10 consecutive Trading Days ending immediately after the later of the
date of the Change in Control or the date of the public announcement of the
Change in Control (in the case of a Change in Control under clause (1) above but
not clause (2) or (3) above) or (B) the period of 10 consecutive Trading Days
ending immediately prior to the date of the Change in Control (in the case of a
Change in Control under clause (2) or (3) above) shall, in either case, equal or
exceed 105% of the Conversion Price of the Securities in effect on each such
Trading Day. For the purposes of this definition, "beneficial owner," has the
meaning attributed to it in Rules 13d-3 under the Exchange Act, whether or not
applicable.

          "Code" has the meaning specified in Section 2.1.

          "combined cash and tender amount" has the meaning specified in Section
10.4(e).

          "combined tender and cash amount" has the meaning specified in Section
10.4(f).

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

          "Common Stock" means the shares of the class designated as common
stock of the Company at the date of this Indenture or as such stock may be
reconstituted from time to time. Subject to the provisions of Section 10.11,
shares issuable on conversion or repurchase of Securities shall include only
shares of Common Stock or shares of any class or classes of common stock
resulting from any reclassification or reclassifications thereof; provided,
however, that if at any time there shall be more than one such resulting class,
the shares so issuable on conversion of Securities shall include shares of all
such classes, and the shares of each such class then so issuable shall be
substantially in the proportion that the total number of shares of such class
resulting from all such reclassifications bears to the total number of shares of
all such classes resulting from all such reclassifications.

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

          "Company Notice" has the meaning specified in Section 12.3(a).

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

                                                                             -4-

<PAGE>

          "Completion Date" has the meaning specified in Section 10.4(f).

          "Constituent Person" has the meaning specified in Section 10.11.

          "Conversion Agent" means any Person authorized by the Company to
convert Securities in accordance with Article Ten. The Company has initially
appointed the Trustee as its Conversion Agent.

          "Conversion Price" means the amount equal to U.S. $1,000 divided by
the Conversion Rate.

          "Conversion Rate" has the meaning specified in Section 10.1.

          "Conversion Shares" has the meaning specified in Section 10.4(m).

          "Corporate Trust Office" means the office of the Trustee at which at
any particular time its corporate trust business shall be principally
administered (which at the date of this Indenture is located at 633 West 5th
Street, 12th Floor, Los Angeles, California 90071, Attn: Corporate Trust
Department (Cell Therapeutics, Inc.)).

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

          "Defaulted Interest" has the meaning specified in Section 2.8.

          "Depositary" means, with respect to any Registered Securities, a
clearing agency that is registered as such under the Exchange Act and is
designated by the Company to act as Depositary for such Registered Securities
(or any successor securities clearing agency so registered).

          "Designated Senior Debt" means the Company's obligations under any
particular Senior Debt in which the instrument creating or evidencing the same,
or the assumption or guarantee thereof, or related agreements or documents to
which the Company is a party, expressly provides that such indebtedness shall be
"Designated Senior Debt" for purposes of this Indenture (provided that such
instrument, agreement or other document may place limitations and conditions on
the right of such Senior Debt to exercise the rights of Designated Senior Debt).
For the purposes of this definition of Designated Senior Debt under this
Indenture, it is the intent of the parties hereto that the Securities issued
under this Indenture be "Designated Senior Debt" (as defined under the Existing
Indenture) for purposes of the Existing Indenture and the Existing Notes.

          "Distribution Date" has the meaning specified in Section 10.4(m).

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

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

          "Event of Default" has the meaning specified in Section 4.1.

                                                                             -5-

<PAGE>

          "Exchange Act" means the United States Securities Exchange Act of 1934
(or any successor statute), as amended from time to time.

          "Existing Indenture" means that certain Indenture, dated June 13,
2001, between the Company and State Street Bank and Trust Company of California,
N.A.

          "Existing Notes" means the Company's 5.75% Convertible Subordinated
Notes due June 15, 2008 issued under the Existing Indenture.

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

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

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

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

          "Maturity," when used with respect to any Security, means the date on
which the principal of such Security becomes due and payable as therein or
herein provided, whether at the Stated Maturity or by declaration of
acceleration, call for redemption, exercise of the repurchase right set forth in
Article Thirteen or otherwise.

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

          "Non-electing Share" has the meaning specified in Section 10.11.

          "Notice of Default" has the meaning specified in Section 4.1.

          "Officers' Certificate" means a certificate signed by the Chairman of
the Board, a Vice Chairman of the Board, the Chief Executive Officer, the
President or a Vice President and by the principal financial officer, the
Treasurer, an Assistant Treasurer, the Secretary or an Assistant Secretary of
the Company, and delivered to the Trustee.

          "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for or employed by the Company and who shall be acceptable to the
Trustee.

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

                                                                             -6-

<PAGE>

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

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

          (3)  Securities that have been paid pursuant to Section 2.7 or in
exchange for or in lieu of which other Securities have been authenticated and
delivered pursuant to this Indenture, other than any such Securities in respect
of which there shall have been presented to the Trustee proof satisfactory to it
that such Securities are held by a bona fide purchaser in whose hands such
Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of Outstanding Securities are present at a meeting of Holders
of Securities for quorum purposes or have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or such other obligor shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in relying upon any such determination as to the presence of a quorum or upon
any such request, demand, authorization, direction, notice, consent or waiver,
only Securities that a Responsible Officer of the Trustee actually knows to be
so owned shall be so disregarded. Securities so owned that have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee's right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or such other obligor.

          "Paying Agent" means any Person authorized by the Company to pay the
principal of or interest on any Securities on behalf of the Company and, except
as otherwise specifically set forth herein, such term shall include the Company
if it shall act as its own Paying Agent. The Company has initially appointed the
Trustee as its Paying Agent.

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

          "Place of Conversion" has the meaning specified in Section 2.2.

          "Place of Payment" has the meaning specified in Section 2.2.

          "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 2.7 in exchange for or in

                                                                             -7-

<PAGE>

lieu of a mutilated, destroyed, lost or stolen Security shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

          "Purchased Shares" has the meaning specified in Section 10.4(f).

          "Purchasers" has the meaning specified in Section 9.9.

          "Record Date" means any Regular Record Date or Special Record Date.

          "Record Date Period" means the period from the close of business of
any Regular Record Date next preceding any Interest Payment Date to the opening
of business on such Interest Payment Date.

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

          "Redemption Price," when used with respect to any Security to be
redeemed, means the price at which it is to be redeemed pursuant to this
Indenture.

          "Registered Securities" has the meaning specified in Section 2.1.

          "Regular Record Date" for interest payable in respect of any
Registered Security on any Interest Payment Date means the June 1 and the
December 1 (whether or not a Business Day), as the case may be, next preceding
such Interest Payment Date.

          "Representative" means (1) the indenture trustee or other trustee,
agent or representative for any Designated Senior Debt or (2) with respect to
Designated Senior Debt that does not have any such trustee, agent or other
representative, (A) in the case of such Designated Senior Debt issued pursuant
to an agreement providing for voting arrangements as among the holders or owners
of such Designated Senior Debt, any holder or owner of such Designated Senior
Debt acting with the consent of the required Persons necessary to bind such
holders or owners of such Designated Senior Debt and (B) in the case of all
other such Designated Senior Debt, the holder or owner of such Designated Senior
Debt.

          "Repurchase Date" has the meaning specified in Section 12.1.

          "Repurchase Price" has the meaning specified in Section 12.1.

          "Responsible Officer," when used with respect to the Trustee, means
any officer within the Corporate Trust Office, including without limitation any
vice president, assistant vice president, assistant treasurer, corporate trust
officer or other employee of the Trustee customarily performing functions
similar to those performed by any of the above designated officers, and also
means, with respect to a particular corporate trust matter, any other officer to
whom such matter is referred because of his knowledge and familiarity with the
particular subject.

                                                                             -8-

<PAGE>

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

          "Rule 144A Information" has the meaning specified in Section 8.6.

          "Securities" has the meaning ascribed to it in the first paragraph
under the caption "Recitals of the Company."

          "Securities Act" means the United States Securities Act of 1933 (or
any successor statute), as amended from time to time.

          "Security Register" and "Security Registrar" have the respective
meanings specified in Section 2.6.

          "Senior Debt" means the principal of (and premium, if any) and
interest (including all interest accruing subsequent to the commencement of any
bankruptcy or similar proceeding, whether or not a claim for post-petition
interest is allowable as a claim in any such proceeding) on, and rent payable in
connection with, and all fees, costs, claims, expenses and other amounts payable
in connection with, the following, whether absolute or contingent, secured or
unsecured, due or to become due, outstanding on the date of this Indenture or
thereafter created, incurred or assumed: (1) all the Company's indebtedness
evidenced by a credit or loan agreement, note, bond, debenture, or other similar
instrument whether or not the recourse of the lender is to all of the Company's
assets or only to a portion, (2) all of the Company's indebtedness, obligations
and other liabilities, contingent or otherwise, for borrowed money, including,
without limitation, overdrafts, foreign exchange contracts, currency agreements,
interest rate protection agreements and any loans or advances from banks,
whether or not evidenced by notes or similar instruments, or bonds, debentures,
notes or similar instruments, whether or not the recourse of the lender is to
all of the Company's assets or only to a portion thereof, (3) all of the
Company's obligations as lessee under leases required to be capitalized on the
balance sheet of the lessee under generally accepted accounting principles, (4)
all of the Company's obligations as lessee under leases for facilities,
equipment or other assets entered into for financing purposes, whether or not
capitalized, (5) all of the Company's 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, 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 a residual
value of leased property to the lessor and all of the Company's obligations
under such lease or related document to purchase or cause a third party to
purchase the leased property, whether or not such lease transaction is
characterized as an operating lease or capitalized lease in accordance with
generally accepted accounting principles, (6) all of the Company's obligations
under interest rate and currency swaps, caps, floors, collars, hedge agreements,
forward contracts, or similar agreements or arrangements, (7) all of the
Company's obligations with respect to letters of credit, bank guarantees,
bankers' acceptances and similar facilities, including related reimbursement
obligations, (8) all of the Company's obligations issued or assumed as the
deferred purchase price of property or services (but excluding trade accounts
payable and accrued liabilities arising in the ordinary course of business), (9)
all of the Company's

                                                                             -9-

<PAGE>

obligations of the type referred to in clauses (1) through (8) above of another
Person and all dividends of another Person, the payment of which, in either
case, the Company has assumed or guaranteed or for which the Company is
responsible or liable, directly or indirectly, jointly or severally, as obligor,
guarantor or otherwise or which is secured by a lien on the Company's property
and (10) renewals, extensions, modifications, replacements, restatements and
refundings of, or any indebtedness or obligation issued in exchange for, any
such indebtedness or obligation described in clauses (1) through (9) of this
definition; provided, however, that Senior Debt shall not include (a) the
Securities, (b) the Company's 5.75% Convertible Subordinated Notes due 2008 (the
"Existing Notes"), or (c) any indebtedness or obligation if the terms of such
indebtedness or obligation (or the terms of the instrument under which such
indebtedness or obligation is issued) expressly provides that such indebtedness
or obligation is not superior in right of payment to the Securities; and
provided, further, that Senior Debt shall not include accounts payable or other
accrued liabilities or obligations incurred in the ordinary course of business
in connection with the obtaining of materials or services and any indebtedness
or obligation that the Company may owe to any direct or indirect Subsidiary. For
the purposes of this definition of Senior Debt under this Indenture, it is the
intent of the parties hereto that the Securities issued under this Indenture be
"Senior Debt" (as defined under the Existing Indenture) for purposes of the
Existing Indenture and the Existing Notes, and in furtherance thereof, the
parties hereto agree that nothing contained in this Indenture or in the
definition of Senior Debt under this Indenture is meant to or shall be construed
to expressly provide that the Securities issued under this Indenture are not
superior to the Existing Notes.

          "Significant Subsidiary" means any Subsidiary that would be a
"significant subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X,
promulgated pursuant to the Securities Act, as such regulation is in effect on
the date hereof.

          "Special Record Date" for the payment of any Defaulted Interest means
a date fixed by the Company pursuant to Section 2.8.

          "Stated Maturity," when used with respect to any Security or any
installment of interest thereon, means 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 a corporation more than 50% of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries, or by the Company and one or more other
Subsidiaries. For the purposes of this definition, "voting stock" means stock or
other similar interests in the corporation that ordinarily has or have voting
power for the election of directors or Persons performing similar functions,
whether at all times or only so long as no senior class of stock or other
interests has or have such voting power by reason of any contingency.

          "Successor Security" of any particular Security means every Security
issued after, and evidencing all or a portion of the same debt as that evidenced
by, such particular Security; and, for the purposes of this definition, any
Security authenticated and delivered under Section 2.7 in

                                                                            -10-

<PAGE>

exchange for or in lieu of a mutilated, destroyed, lost or stolen Security shall
be deemed to evidence the same debt as the mutilated, destroyed, lost or stolen
Security.

          "Trading Days" means (1) if the Common Stock is listed or admitted for
trading on any national securities exchange, days on which such national
securities exchange is open for business; (2) if the Common Stock is quoted on
The Nasdaq National Market or any other system of automated dissemination of
quotations of securities prices, days on which trades may be effected through
such system; or (3) if the Common Stock is not listed or admitted for trading on
any national securities exchange or quoted on The Nasdaq National Market or any
other system of automated dissemination of quotation of securities prices, days
on which the Common Stock is traded regular way in the over-the-counter market
and for which a closing bid and a closing asked price for the Common Stock are
available.

          "Trust Indenture Act" means the Trust Indenture Act of 1939 as in
force at the date as of which this instrument was executed; provided, however,
that in the event the Trust Indenture Act of 1939 is amended after such date,
"Trust Indenture Act" means, to the extent required by any such amendment, the
Trust Indenture Act of 1939 as so amended.

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

          "United States" means the United States of America (including the
several States and the District of Columbia), its territories, its possessions
and other areas subject to its jurisdiction (its "possessions" including Puerto
Rico, the United States Virgin Islands, Guam, American Samoa, Wake Island and
the Northern Mariana Islands).

          "Vice President," when used with respect to the Company, means any
vice president, whether or not designated by a number or a word or words added
before or after the title "vice president."

          SECTION 1.2    Compliance Certificates and Opinions.

          Upon any application or request by the Company to the Trustee to take
any action under any provision of this Indenture, the Company shall furnish to
the Trustee an Officers' Certificate stating that all conditions precedent, if
any, provided for in this Indenture relating to the proposed action have been
complied with and, if required by the Trust Indenture Act, an Opinion of Counsel
stating that in the opinion of such counsel all such conditions precedent, if
any, have been complied with, except that in the case of any such application or
request as to which the furnishing of such documents is specifically required by
any provision of this Indenture relating to such particular application or
request, no additional certificate or opinion need be furnished. Every
certificate or opinion with respect to compliance with a condition or covenant
provided for in this Indenture (including certificates provided for in Section
8.8) shall include:

                                                                            -11-

<PAGE>

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

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

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

               (d)  a statement as to whether, in the opinion of each such
individual, such condition or covenant has been complied with; provided,
however, with respect to matters of fact, an Opinion of Counsel may rely on an
Officers' Certificate or certificates of public officials.

          SECTION 1.3    Form of Documents Delivered to the Trustee.

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

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

          Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

          SECTION 1.4    Acts of Holders of Securities.

               (a)  Any request, demand, authorization, direction, notice,
consent, waiver or other action provided or permitted by this Indenture to be
given or taken by Holders of Securities may be embodied in and evidenced by one
or more instruments of substantially similar tenor signed by such Holders in
person or by an agent or proxy duly appointed in writing by such Holders. Such
action shall become effective when such instrument or instruments is delivered
to the Trustee and, where it

                                                                            -12-

<PAGE>

is hereby expressly required, to the Company. The Trustee shall promptly deliver
to the Company copies of all such instruments delivered to the Trustee. Such
instrument or instruments (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Holders of
Securities signing such instrument or instruments. Proof of execution of any
such instrument or of a writing appointing any such agent or proxy, or of the
holding by any Person of a Security, shall be sufficient for any purpose of this
Indenture and (subject to Section 5.1) conclusive in favor of the Trustee and
the Company if made in the manner provided in this Section 1.4.

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

               (c)  The principal amount and serial number of any Registered
Security held by any Person, and the date of his holding the same, shall be
proved by the Security Register.

               (d)  The fact and date of execution of any such instrument or
writing and the authority of the Person executing the same may also be proved in
any other manner that the Trustee deems sufficient; and the Trustee may in any
instance require further proof with respect to any of the matters referred to in
this Section 1.4.

               (e)  The Company may set any day as the record date for the
purpose of determining the Holders entitled to give or take any request, demand,
authorization, direction, notice, consent, waiver or other action, or to vote on
any action, authorized or permitted by this Indenture to be given or taken by
Holders. Promptly and in any case not later than ten days after setting a record
date, the Company shall notify the Trustee and the Holders of such record date.
If not set by the Company prior to the first solicitation of a Holder made by
any Person in respect of any such action, or, in the case of any such vote,
prior to such vote, the record date for any such action or vote shall be the
thirtieth day (or, if later, the date of the most recent list of Holders
required to be provided pursuant to Section 13.1) prior to such first
solicitation or vote, as the case may be. With regard to any record date, the
Holders on such date (or their duly appointed agents or proxies), and only such
Persons, shall be entitled to give or take, or vote on, the relevant action,
whether or not such Holders remain Holders after such record date.
Notwithstanding the foregoing, the Company shall not set a record date for, and
the provisions of this paragraph shall not apply with respect to, any notice,
declaration or direction referred to in the next paragraph.

          Upon receipt by the Trustee from any Holder of (1) any notice of
default or breach referred to in Section 4.1(d), if such default or breach has
occurred and is continuing and the Trustee shall not have given such a notice to
the Company, (2) any declaration of acceleration referred to in Section 4.2, if
an Event of Default has occurred and is continuing and the Trustee shall not
have given such a declaration to the Company, or (3) any direction referred to
in Section 4.12, if the Trustee shall not have taken the action specified in
such direction, then, with respect to clauses (2) and (3), a record date shall
automatically and without any action by the Company or the Trustee be

                                                                            -13-

<PAGE>

set for determining the Holders entitled to join in such declaration or
direction, which record date shall be the close of business on the tenth day
(or, if such day is not a Business Day, the next succeeding Business Day)
following the day on which the Trustee receives such declaration or direction,
and, with respect to clause (1), the Trustee may set any day as a record date
for the purpose of determining the Holders entitled to join in such notice of
default. Promptly after such receipt by the Trustee of any such declaration or
direction referred to in clause (2) or (3), and promptly after setting any
record date with respect to clause (1), and as soon as practicable thereafter,
the Trustee shall notify the Company and the Holders of any such record date so
fixed. The Holders on such record date (or their duly appointed agents or
proxies), and only such Persons, shall be entitled to join in such notice,
declaration or direction, whether or not such Holders remain Holders after such
record date; provided, however, that, unless such notice, declaration or
direction shall have become effective by virtue of Holders of the requisite
principal amount of Securities on such record date (or their duly appointed
agents or proxies) having joined therein on or prior to the ninetieth day after
such record date, such notice, declaration or direction shall automatically and
without any action by any Person be cancelled and of no further effect. Nothing
in this paragraph shall be construed to prevent a Holder (or a duly appointed
agent or proxy thereof) from giving, before or after the expiration of such
90-day period, a notice, declaration or direction contrary to or different from,
or, after the expiration of such period, identical to, the notice, declaration
or direction to which such record date relates, in which event a new record date
in respect thereof shall be set pursuant to this paragraph. In addition, nothing
in this paragraph shall be construed to render ineffective any notice,
declaration or direction of the type referred to in this paragraph given at any
time to the Trustee and the Company by Holders (or their duly appointed agents
or proxies) of the requisite principal amount of Securities on the date such
notice, declaration or direction is so given.

               (f)  Except as provided in Sections 4.2 and 4.13, any request,
demand, authorization, direction, notice, consent, election, waiver or other Act
of the Holder of any Security shall bind every future Holder of the same
Security and the Holder of every Security issued upon the registration of
transfer thereof or in exchange therefor or in lieu thereof in respect of
anything done, omitted or suffered to be done by the Trustee or the Company in
reliance thereon, whether or not notation of such action is made upon such
Security.

          SECTION 1.5    Notices, Etc., to Trustee and Company.

          Any request, demand, authorization, direction, notice, consent,
election, waiver or other Act of Holders of Securities or other document
provided or permitted by this Indenture to be made upon, given or furnished to,
or filed with,

               (a)  the Trustee by any Holder of Securities or by the Company
shall be sufficient for every purpose hereunder if made, given, furnished or
filed in writing to or with the Trustee and received at the Corporate Trust
Office, Attention: Corporate Trust Department, and shall be deemed given when
received,

               (b)  the Company by the Trustee or by any Holder of Securities
shall be sufficient for every purpose hereunder (unless otherwise herein
expressly provided) if in writing, mailed, first-

                                                                            -14-

<PAGE>

class postage prepaid, or telecopied and confirmed by mail, first-class postage
prepaid, or delivered by hand or overnight courier, addressed to the Company at
501 Elliott Avenue West, Suite 400, Seattle, Washington 98119, Attention: Louis
A. Bianco (telecopy no.: (206) 284-6206), or at any other address previously
furnished in writing to the Trustee by the Company, and shall be deemed given
when received.

          Any request, demand, authorization, direction, notice, consent,
election or waiver required or permitted under this Indenture shall be in the
English language, except that any published notice may be in an official
language of the country of publication.

          SECTION 1.6    Notice to Holders of Securities; Waiver.

          Except as otherwise expressly provided herein, where this Indenture
provides for notice to Holders of Securities of any event, such notice shall be
sufficiently given to Holders if in writing and mailed, first-class postage
prepaid, to each Holder of a Security affected by such event, at the address of
such Holder as it appears in the Security Register, not earlier than the
earliest date and not later than the latest date prescribed for the giving of
such notice.

          Neither the failure to mail such notice, nor any defect in any notice
so mailed, to any particular Holder of a Registered Security shall affect the
sufficiency of such notice with respect to other Holders of Registered
Securities. In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such notification to Holders of Registered Securities as shall be made with
the approval of the Trustee, which approval shall not be unreasonably withheld
or delayed, shall constitute a sufficient notification to such Holders for every
purpose hereunder.

          Such notice shall be deemed to have been given when such notice is
mailed.

          Where this Indenture provides for notice in any manner, such notice
may be waived in writing by the Person entitled to receive such notice, either
before or after the event, and such waiver shall be the equivalent of such
notice. Waivers of notice by Holders of Securities shall be filed with the
Trustee, but such filing shall not be a condition precedent to the validity of
any action taken in reliance upon such waiver.

          SECTION 1.7    Effect of Headings and Table of Contents.

          The Article and Section headings herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.

          SECTION 1.8    Successors and Assigns.

          All covenants and agreements in this Indenture by the Company and by
the Trustee shall bind its successors and assigns, whether so expressed or not.

                                                                            -15-

<PAGE>

          SECTION 1.9    Separability Clause.

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

          SECTION 1.10   Benefits of Indenture.

          Except as provided in the next sentence, nothing in this Indenture or
in the Securities, express or implied, shall give to any Person, other than the
parties hereto and their successors and assigns hereunder and the Holders of
Securities, any benefit or legal or equitable right, remedy or claim under this
Indenture. The provisions of Article Eleven are intended to be for the benefit
of, and shall be enforceable directly by, the holders of Senior Debt.

          SECTION 1.11   Governing Law.

          THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, THE UNITED STATES OF
AMERICA, INCLUDING, WITHOUT LIMITATION, THE NEW YORK GENERAL OBLIGATIONS LAW
ss.5-1401.

          SECTION 1.12   Legal Holidays.

          In any case where any Interest Payment Date, Redemption Date,
Repurchase Date or Stated Maturity of any Security or the last day on which a
Holder of a Security has a right to convert his Security shall not be a Business
Day at a Place of Payment or Place of Conversion, as the case may be, then
(notwithstanding any other provision of this Indenture or of the Securities)
payment of principal of, premium, if any, or interest on, or the payment of the
Repurchase Price (whether the same is payable in cash or in shares of Common
Stock) with respect to, or delivery for conversion of, such Security need not be
made at such Place of Payment or Place of Conversion, as the case may be, on or
by such day, but may be made on or by the next succeeding Business Day at such
Place of Payment or Place of Conversion, as the case may be, with the same force
and effect as if made on the Interest Payment Date, Redemption Date or
Repurchase Date, or at the Stated Maturity or by such last day for conversion;
provided, however, that in the case that payment is made on such succeeding
Business Day, no interest shall accrue on the amount so payable for the period
from and after such Interest Payment Date, Redemption Date, Repurchase Date,
Stated Maturity or last day for conversion, as the case may be.

          SECTION 1.13   Conflict with Trust Indenture Act.

          If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act that is required under such act to be a
part of and govern this Indenture, the latter provision shall control. If any
provision of this Indenture modifies or excludes any provision of the Trust
Indenture Act that may be so modified or excluded, the latter provision shall be
deemed to apply to this Indenture as so modified or to be excluded, as the case
may be. Until such time as this Indenture

                                                                            -16-

<PAGE>

shall be qualified under the Trust Indenture Act, this Indenture, the Company
and the Trustee shall be deemed for all purposes hereof to be subject to and
governed by the Trust Indenture Act to the same extent as would be the case if
this Indenture were so qualified on the date hereof.

          SECTION 1.14   Counterparts.

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

                                   ARTICLE TWO

                                 THE SECURITIES

          SECTION 2.1    Form Generally.

          The Securities and the Trustee's Certificate of Authentication shall
be in substantially the form set forth in Exhibit A hereto, which Exhibit is a
part of this Indenture, with such appropriate insertions, omissions,
substitutions and other variations as are required or permitted by this
Indenture, and may have such letters, numbers or other marks of identification
and such legends or endorsements placed thereon as may be required to comply
with the rules of any securities exchange or the Internal Revenue Code of l986,
as amended, and regulations thereunder (the "Code"), or as may, consistently
herewith, be determined by the officers executing such Securities, as evidenced
by their execution thereof. All Securities shall be issued in registered form,
as opposed to bearer form, and shall sometimes be referred to as the "Registered
Securities."

          The Securities shall be printed, lithographed, typewritten or engraved
or produced by any combination of these methods on steel engraved borders, if so
required by any securities exchange upon which the Securities may be listed, or
may be produced in any other manner permitted by the rules of any such
securities exchange, or, if the Securities are not listed on a securities
exchange, in any other manner approved by the Company, all as determined by the
officers executing such Securities, as evidenced by their execution thereof.

          Upon their original issuance, Securities shall be issued in the form
of one or more Global Securities without interest coupons and shall be
registered in the name of DTC, as Depositary, or its nominee and deposited with
the Trustee, as custodian for DTC, for credit by DTC to the respective accounts
of beneficial owners of the Securities represented thereby (or such other
accounts as they may direct). Such Global Security, together with its Successor
Securities that are Global Securities, are collectively herein called the
"Global Security."

          SECTION 2.2    Title and Terms.

          The aggregate principal amount of Securities that may be authenticated
and delivered under this Indenture is limited to U.S.$102,900,000, except for
Securities authenticated and delivered in exchange for, or in lieu of, other
Securities pursuant to Section 2.5, 2.6, 2.7, 7.5, 9.8, 10.2 or 12.3(e).

                                                                            -17-

<PAGE>

          The Securities shall be known and designated as the "5.75% Convertible
Senior Subordinated Notes due June 15, 2008" of the Company. Their Stated
Maturity shall be June 15, 2008 and they shall bear interest on their principal
amount from December 20, 2002, payable semiannually in arrears on June 15 and
December 15 in each year, commencing June 15, 2003, at the rate of 5.75% per
annum until the principal thereof is due and at the rate then in effect on any
overdue principal and, to the extent permitted by law, on any overdue interest;
provided, however, that payments shall only be made on Business Days as provided
in Section 1.12.

          The principal of, premium, if any, and interest on the Securities
shall be payable as provided in the form of Securities attached hereto as
Exhibit A, and the Repurchase Price, whether payable in cash or in shares of
Common Stock, shall be payable at such places as are identified in the Company
Notice given pursuant to Section 12.3 (any city in which any Paying Agent is
located being herein called a "Place of Payment").

          The Securities shall be redeemable at the option of the Company, as
provided in Article Nine and in the form of Securities attached hereto as
Exhibit A.

          The Securities shall be convertible as provided in Article Ten (any
city in which any Conversion Agent is located being herein called a "Place of
Conversion").

          The Securities shall be subordinated in right of payment to Senior
Debt of the Company as provided in Article Eleven.

          The Securities shall be subject to repurchase by the Company at the
option of the Holders as provided in Article Twelve.

          SECTION 2.3    Denominations.

          The Securities shall be issuable only in registered form, without
coupons, in denominations of U.S.$1,000 and integral multiples thereof.

          SECTION 2.4    Execution, Authentication, Delivery and Dating.

          The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its Vice Chairman of the Board, its Chief Executive
Officer, its President, one of its Vice Presidents, its Chief Financial Officer,
its Treasurer or its Controller and attested by its Chairman of the Board, its
Vice Chairman of the Board, its Chief Executive Officer, its President, one of
its Vice Presidents, its Chief Financial Officer, its Treasurer, its Controller,
its Secretary or one of its Assistant Secretaries. Any such signature may be
manual or facsimile.

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

                                                                            -18-

<PAGE>

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

          Each Security shall be dated the date of its authentication.

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

          SECTION 2.5    Global Securities; Temporary Securities.

               (a)  Global Securities.

                    (1)       Each Global Security authenticated under this
Indenture shall be registered in the name of the Depositary designated by the
Company for such Global Security or a nominee thereof and delivered to such
Depositary or a nominee thereof or custodian therefor, and each such Global
Security shall constitute a single Security for all purposes of this Indenture.

                    (2)       Notwithstanding any other provision in this
Indenture, no Global Security may be exchanged in whole or in part for
Securities registered, and no transfer of a Global Security in whole or in part
may be registered, in the name of any Person other than the Depositary for such
Global Security or a nominee thereof unless (A) such Depositary (i) has notified
the Company that it is unwilling or unable to continue as Depositary for such
Global Security or (ii) has ceased to be a clearing agency registered as such
under the Exchange Act or announces an intention permanently to cease business
or does in fact do so or (B) there shall have occurred and be continuing an
Event of Default with respect to such Global Security.

                    (3)       If any Global Security is to be exchanged for
other Securities or cancelled in whole, it shall be surrendered by or on behalf
of the Depositary or its nominee to the Trustee, as Security Registrar, for
exchange or cancellation, as provided in this Article Two. If any Global
Security is to be exchanged for other Securities or cancelled in part, or if
another Security is to be exchanged in whole or in part for a beneficial
interest in any Global Security, in each case, as provided in Section 2.6, then
either (A) such Global Security shall be so surrendered for exchange or
cancellation, as provided in this Article Two, or (B) the principal amount
thereof shall be reduced or increased by an amount equal to the portion thereof
to be so exchanged or cancelled or equal to the principal amount of such other
Security to be so exchanged for a beneficial interest therein, as the case may
be, by means of an appropriate adjustment made on the records of the Trustee, as
Security Registrar, whereupon the Trustee, in accordance with the Applicable
Procedures, shall instruct the Depositary or its authorized representative to
make a corresponding adjustment to its records. Upon any such surrender or
adjustment of a Global Security, the Trustee shall, subject to Section 2.6(c)

                                                                            -19-

<PAGE>

and as otherwise provided in this Article Two, authenticate and make available
for delivery any Securities issuable in exchange for such Global Security (or
any portion thereof) to or upon the order of, and registered in such names as
may be directed by, the Depositary or its authorized representative. Upon the
request of the Trustee in connection with the occurrence of any of the events
specified in the preceding paragraph, the Company shall promptly make available
to the Trustee a reasonable supply of Securities that are not in the form of
Global Securities. The Trustee shall be entitled to rely upon any order,
direction or request of the Depositary or its authorized representative which is
given or made pursuant to this Article Two.

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

                    (5)       The Depositary or its nominee, as registered owner
of a Global Security, shall be the Holder of such Global Security for all
purposes under the Indenture and the Registered Securities, and owners of
beneficial interests in a Global Security shall hold such interests pursuant to
the Applicable Procedures. Accordingly, any such owner's beneficial interest in
a Global Security shall be shown only on, and the transfer of such interest
shall be effected only through, records maintained by the Depositary or its
nominee or its Agent Members, and such owners of beneficial interests in a
Global Security shall not be considered the owners or holders thereof.

               (b)  Temporary Securities.

          Pending the preparation of definitive Securities, the Company may
execute, and upon Company Order the Trustee shall authenticate and make
available for delivery, temporary Securities which are printed, lithographed,
typewritten, mimeographed or otherwise produced, in any authorized denomination,
substantially of the tenor of the definitive Registered Securities in lieu of
which they are issued and with such appropriate insertions, omissions,
substitutions and other variations as the officers executing such Registered
Securities may determine, as evidenced by their execution of such Securities.

          If temporary Securities are issued, the Company shall cause definitive
Securities to be prepared without unreasonable delay. After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at any office
or agency of the Company designated pursuant to Section 8.2, without charge to
the Holder. Upon surrender for cancellation of any one or more temporary
Securities, the Company shall execute and the Trustee shall authenticate and
make available for delivery in exchange therefor a like principal amount of
definitive Securities of authorized denominations. Until so exchanged, the
temporary Securities shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities.

                                                                            -20-

<PAGE>

          SECTION 2.6    Registration, Registration of Transfer and Exchange;
Restrictions on Transfer.

               (a)  The Company shall cause to be kept at the Corporate Trust
Office a register (the register maintained in such office and in any other
office or agency of the Company designated pursuant to Section 8.2 being herein
sometimes collectively referred to as the "Security Register") in which, subject
to such reasonable regulations as it may prescribe, the Company shall provide
for the registration of Registered Securities and of transfers of Registered
Securities. The Trustee is hereby appointed "Security Registrar" for the purpose
of registering Registered Securities and transfers and exchanges of Registered
Securities as herein provided.

          Upon surrender for registration of transfer of any Security at an
office or agency of the Company designated pursuant to Section 8.2 for such
purpose, the Company shall execute, and the Trustee shall authenticate and
deliver, in the name of the designated transferee or transferees, one or more
new Securities of any authorized denominations and of a like aggregate principal
amount and bearing such restrictive legends as may be required by this
Indenture.

          At the option of the Holder, and subject to the other provisions of
this Section 2.6, Securities may be exchanged for other Securities of any
authorized denomination and of a like aggregate principal amount, upon surrender
of the Securities to be exchanged at any such office or agency. Whenever any
Securities are so surrendered for exchange, and subject to the other provisions
of this Section 2.6, the Company shall execute, and the Trustee shall
authenticate and make available for delivery, the Securities the Holder making
the exchange is entitled to receive. Every Security presented or surrendered for
registration of transfer or for exchange shall (if so required by the Company or
the Security Registrar) be duly endorsed, or be accompanied by a written
instrument of transfer in form satisfactory to the Company and the Security
Registrar, duly executed by the Holder thereof or his attorney duly authorized
in writing.

          All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company, evidencing the same
debt, subject to the other provisions of this Section 2.6, and entitled to the
same benefits under this Indenture, as the Securities surrendered upon such
registration of transfer or exchange.

          No service charge shall be made for any registration of transfer or
exchange of Securities except as provided in Section 2.7, but the Company may
require payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in connection with any registration of transfer or
exchange of Securities, other than exchanges pursuant to Section 2.5, 7.5, 9.8,
10.2 or 12.3(e) (other than where the shares of Common Stock are to be issued or
delivered in a name other than that of the Holder of the Security) not involving
any transfer and other than any stamp and other duties, if any, that may be
imposed in connection with any such transfer or exchange by the United States or
any political subdivision thereof or therein, which shall be paid by the
Company.

          In the event of a redemption of the Securities, the Company shall not
be required (1) to register the transfer of or exchange Securities for a period
of 15 days immediately preceding the date

                                                                            -21-

<PAGE>

notice is given identifying the serial numbers of the Securities called for such
redemption or (2) to register the transfer of or exchange any Security, or
portion thereof, called for redemption.

               (b)  Neither the Trustee, the Paying Agent nor any of their
agents shall (1) have any duty to monitor compliance with or with respect to any
federal or state or other securities or tax laws or (2) have any duty to obtain
documentation on any transfers or exchanges other than as specifically required
hereunder.

          SECTION 2.7    Mutilated, Destroyed, Lost or Stolen Securities.

          If any mutilated Security is surrendered to the Trustee, the Company
shall execute and the Trustee shall authenticate and make available for delivery
in exchange therefor a new Security of like tenor and principal amount and
bearing a number not contemporaneously outstanding.

          If there be delivered to the Company and to the Trustee:

               (a)  evidence to their satisfaction of the destruction, loss or
theft of any Security, and

               (b)  such security or indemnity as may be satisfactory to the
Company and the Trustee to save each of them and any agent of either of them
harmless, then, in the absence of actual notice to the Company or the Trustee
that such Security has been acquired by a bona fide purchaser, the Company shall
execute and the Trustee shall authenticate and make available for delivery, in
lieu of any such destroyed, lost or stolen Security, a new Security of like
tenor and principal amount and bearing a number not contemporaneously
outstanding.

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

          Upon the issuance of any new Security under this Section 2.7, the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto (other than any
stamp and other duties, if any, that may be imposed in connection therewith by
the United States or any political subdivision thereof or therein, which shall
be paid by the Company) and any other expenses (including the fees and expenses
of the Trustee) connected therewith.

          Every new Security issued pursuant to this Section 2.7 in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the mutilated,
destroyed, lost or stolen Security shall be at any time enforceable by anyone,
and such new Security shall be entitled to all the benefits of this Indenture
equally and proportionately with any and all other Securities duly issued
hereunder.

                                                                            -22-

<PAGE>

          The provisions of this Section 2.7 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies of any Holder with respect
to the replacement or payment of mutilated, destroyed, lost or stolen
Securities.

          SECTION 2.8    Payment of Interest; Interest Rights Preserved.

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

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

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

               (b)  The Company may make payment of any Defaulted Interest in
any other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities may be listed, and upon such notice as may be
required by such exchange, if, after notice given by the Company to the Trustee
of the proposed payment pursuant to this clause, such manner of payment shall be
deemed practicable by the Trustee.

                                                                            -23-

<PAGE>

          Subject to the foregoing provisions of this Section 2.8 and Section
2.6, each Security delivered under this Indenture upon registration of transfer
of or in exchange for or in lieu of any other Security shall carry the rights to
interest accrued and unpaid, and to accrue, that were carried by such other
Security.

          Interest on any Security that is converted in accordance with Section
10.2 during a Record Date Period shall be payable in accordance with the
provisions of Section 10.2.

          SECTION 2.9    Persons Deemed Owners.

          Prior to due presentment of a Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name such Security is registered as the owner of such
Security for the purpose of receiving payment of principal of, premium, if any,
and (subject to Section 2.8) interest on such Security and for all other
purposes whatsoever, whether or not such Security be overdue, and neither the
Company, the Trustee nor any agent of the Company or the Trustee shall be
affected by notice to the contrary.

          SECTION 2.10   Cancellation.

          All Securities surrendered for payment, redemption, repurchase,
registration of transfer or exchange or conversion shall, if surrendered to any
Person other than the Trustee, be delivered to the Trustee. All Securities so
delivered to the Trustee shall be cancelled promptly by the Trustee. No
Securities shall be authenticated in lieu of or in exchange for any Securities
cancelled as provided in this Section 2.10. The Trustee shall dispose of all
cancelled Securities in accordance with applicable law and its customary
practices in effect from time to time.

          SECTION 2.11   Computation of Interest.

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

          SECTION 2.12   CUSIP Numbers.

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

                                                                            -24-

<PAGE>

                                  ARTICLE THREE

                           SATISFACTION AND DISCHARGE

          SECTION 3.1    Satisfaction and Discharge of Indenture.

          This Indenture shall upon Company Request cease to be of further
effect (except as to any surviving rights of conversion, or registration of
transfer or exchange, or replacement of Securities herein expressly provided for
and the Company's obligations to the Trustee pursuant to Section 5.7), and the
Trustee, at the expense of the Company, shall execute proper instruments in form
and substance satisfactory to the Trustee acknowledging satisfaction and
discharge of this Indenture, when

               (a)  either

                    (1)       all Securities theretofore authenticated and
delivered (other than (A) Securities that have been destroyed, lost or stolen
and that have been replaced or paid as provided in Section 2.7 and (B)
Securities for whose payment money has theretofore been deposited in trust or
segregated and held in trust by the Company and thereafter repaid to the Company
or discharged from such trust, as provided in Section 8.3) have been delivered
to the Trustee for cancellation; or

                    (2)       all such Securities not theretofore delivered to
the Trustee or its agent for cancellation (other than Securities referred to in
clauses (A) and (B) of clause (a)(1) above)

                              (i)   have become due and payable, or

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

                              (iii) are to be called for redemption within one
year under arrangements satisfactory to the Trustee for the giving of notice of
redemption by the Trustee in the name, and at the expense, of the Company, and
the Company, in the case of clause (i), (ii) or (iii) above, has deposited or
caused to be deposited with the Trustee as trust funds (immediately available to
the Holders in the case of clause (i) above) an amount sufficient to pay and
discharge the entire principal, premium, if any, and interest on such Securities
not theretofore delivered to the Trustee for cancellation, to the date of such
deposit (in the case of Securities that have become due and payable) or to the
Stated Maturity or Redemption Date, as the case may be;

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

               (c)  the Company has delivered to the Trustee an Officers'
Certificate stating that all conditions precedent herein provided for relating
to the satisfaction and discharge of this Indenture have been complied with.

                                                                            -25-

<PAGE>

          Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 5.7, the obligations of
the Company to any Authenticating Agent under Section 5.12, the obligations of
the Trustee under Section 3.2 and the last paragraph of Section 8.3, and the
obligations of the Company and the Trustee under Section 2.6 and Article Ten
shall survive. Funds held in trust pursuant to this Section 3.1 are not subject
to the provisions of Article Eleven.

          SECTION 3.2    Application of Trust Money.

          Subject to the provisions of the last paragraph of Section 8.3, all
money deposited with the Trustee pursuant to Section 3.1 shall be held in trust
and applied by it, in accordance with the provisions of the Securities and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent), to the Persons entitled
thereto, of the principal, premium, if any, and interest for whose payment such
money has been deposited with the Trustee.

          All moneys deposited with the Trustee pursuant to Section 3.1 (and
held by it or any Paying Agent) for the payment of Securities subsequently
converted shall be returned to the Company upon Company Request.

                                  ARTICLE FOUR

                                    REMEDIES

          SECTION 4.1    Events of Default.

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

               (a)  default in the payment of the principal of or premium, if
any, on any Security at its Maturity, whether or not the such payment is
prohibited by the subordination provisions of this Indenture; or

               (b)  default in the payment of any interest if any, upon any
Security when it becomes due and payable, and continuance of such default for a
period of 30 days, whether or not such payment is prohibited by the
subordination provisions of this Indenture; or

               (c)  failure by the Company to give the Company Notice in
accordance with Section 12.3, whether or not such notice is prohibited by the
subordination provisions of this Indenture; or

                                                                            -26-

<PAGE>

               (d)  default in the performance, or breach, of any covenant of
the Company in this Indenture (other than a covenant a default in the
performance or breach of which is specifically dealt with elsewhere in this
Section 4.1), and continuance of such default or breach for a period of 60 days
after there has been given, by registered or certified mail, to the Company by
the Trustee or to the Company and the Trustee by the Holders of at least 25% in
aggregate principal amount of the Outstanding Securities, a written notice
specifying such default or breach and requiring it to be remedied and stating
that such notice is a "Notice of Default" hereunder; or

               (e)  default in the payment when due of the principal of any
indebtedness under any bond, debenture, note or other evidence of indebtedness
for money borrowed by the Company or any Significant Subsidiary with a principal
amount then outstanding in excess of U.S. $10,000,000, whether such indebtedness
now exists or shall hereafter be created, if the indebtedness is not discharged
and such default continues for a period of 30 days or more, or if such
indebtedness has been accelerated, such acceleration is not rescinded or
annulled, within a period of 30 days after there shall have been given, by
registered or certified mail, to the Company by the Trustee or to the Company
and the Trustee by the Holders of at least 25% in principal amount of the
Outstanding Securities a written notice specifying such default and requiring
the Company to cause such indebtedness to be discharged or such acceleration to
be rescinded or annulled and stating that such notice is a "Notice of Default"
hereunder; or

               (f)  the entry by a court having jurisdiction in the premises of
(1) a decree or order for relief in respect of the Company or any Significant
Subsidiary in an involuntary case or proceeding under any applicable federal or
state bankruptcy, insolvency, reorganization or other similar law or (2) a
decree or order adjudging the Company or any Significant Subsidiary a bankrupt
or insolvent, or approving as properly filed a petition seeking reorganization,
arrangement, adjustment or composition of or in respect of the Company or any
Significant Subsidiary under any applicable federal or state law, or appointing
a custodian, receiver, liquidator, assignee, trustee, sequestrator or other
similar official of the Company or any Significant Subsidiary or of any
substantial part of its property, or ordering the winding up or liquidation of
its affairs, and the continuance of any such decree or order for relief or any
such other decree or order unstayed and in effect for a period of 60 consecutive
days; or

               (g)  the commencement by the Company or any Significant
Subsidiary of a voluntary case or proceeding under any applicable federal or
state bankruptcy, insolvency, reorganization or other similar law or of any
other case or proceeding to be adjudicated a bankrupt or insolvent, or the
consent by it to the entry of a decree or order for relief in respect of the
Company or any Significant Subsidiary in an involuntary case or proceeding under
any applicable federal or state bankruptcy, insolvency, reorganization or other
similar law or to the commencement of any bankruptcy or insolvency case or
proceeding against it, or the filing by it of a petition or answer or consent
seeking reorganization or similar relief under any applicable federal or state
law, or the consent by it to the filing of such petition or to the appointment
of or taking possession by a custodian, receiver, liquidator, assignee, trustee,
sequestrator or other similar official of the Company or any Significant
Subsidiary or of any substantial part of its property, or the making by it of an
assignment for the benefit of creditors, or the admission by it in writing of
its inability to pay

                                                                            -27-

<PAGE>

its debts generally as they become due, or the taking of corporate action by the
Company or any Significant Subsidiary in furtherance of any such action.

          SECTION 4.2    Acceleration of Maturity; Rescission and Annulment.

          If an Event of Default (other than an Event of Default specified in
Section 4.1(f) or 4.1(g)) occurs and is continuing, then in every such case the
Trustee or the Holders of not less than 25% in principal amount of the
Outstanding Securities may declare the principal of all the Securities to be due
and payable immediately, by a notice in writing to the Company (and to the
Trustee if given by the Holders), and upon any such declaration, such principal
and all accrued interest thereon shall become immediately due and payable. If an
Event of Default specified in Section 4.1(f) or 4.1(g) occurs, the principal of,
and accrued interest on, all the Securities shall ipso facto become immediately
due and payable without any declaration or other Act of the Holder or any act on
the part of the Trustee.

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

               (a)  the Company has paid or deposited with the Trustee a sum
sufficient to pay (1) all overdue interest on all Securities, (2) the principal
of and premium, if any, on any Securities that have become due otherwise than by
such declaration of acceleration and any interest thereon at the rate borne by
the Securities, (3) to the extent permitted by applicable law, interest upon
overdue interest at the rate then in effect, and (4) all sums paid or advanced
by the Trustee hereunder and the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and its counsel; and

               (b)  all Events of Default, other than the non-payment of the
principal of, and any premium and interest on, Securities that have become due
solely by such declaration of acceleration, have been cured or waived as
provided in Section 4.13.

          No rescission or annulment referred to above shall affect any
subsequent default or impair any right consequent thereon.

          SECTION 4.3    Collection of Indebtedness and Suits for Enforcement by
Trustee.

          The Company covenants that if:

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

               (b)  default is made in the payment of the principal of or
premium, if any, on any Security at the Maturity thereof, the Company will upon
demand of the Trustee pay to it, for the

                                                                            -28-

<PAGE>

benefit of the Holders of such Securities, the whole amount then due and payable
on such Securities for principal, premium, if any, and interest on any overdue
principal, premium, if any, and, to the extent permitted by applicable law, on
any overdue interest at the rate then in effect, and in addition thereto, such
further amount as shall be sufficient to cover the reasonable costs and expenses
of collection, including the reasonable compensation, expenses, disbursements
and advances of the Trustee, its agents and its counsel.

          If the Company fails to pay such amounts forthwith upon such demand,
the Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same
against the Company or any other obligor upon the Securities and collect the
moneys adjudged or decreed to be payable in the manner provided by law out of
the property of the Company or any other obligor upon the Securities, wherever
situated.

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

          SECTION 4.4    Trustee May File Proofs of Claim.

          In case of the pendency of any receivership, insolvency, liquidation,
bankruptcy, reorganization, arrangement, adjustment, composition or other
judicial proceeding relating to the Company or any other obligor upon the
Securities or the property of the Company or of such other obligor or the
creditors of either, the Trustee (whether or not the principal of, and any
interest on, the Securities shall then be due and payable as therein expressed
or by declaration or otherwise and whether or not the Trustee shall have made
any demand on the Company for the payment of overdue principal or interest)
shall be entitled and empowered, by intervention in such proceeding or
otherwise,

               (a)  to file and prove a claim for the whole amount of principal,
premium, if any, and interest owing and unpaid in respect of the Securities and
take such other actions, including participating as a member, voting or
otherwise, of any official committee of creditors appointed in such matter, and
to file such other papers or documents, in each of the foregoing cases, as may
be necessary or advisable in order to have the claims of the Trustee (including
any claim for the reasonable compensation, expenses, disbursements and advances
of the Trustee, its agents and its counsel) and of the Holders of Securities
allowed in such judicial proceeding, and

               (b)  to collect and receive any moneys or other property payable
or deliverable on any such claim and to distribute the same; and any custodian,
receiver, assignee, trustee, liquidator, sequestrator or other similar official
in any such judicial proceeding is hereby authorized by each Holder of
Securities to make such payments to the Trustee and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders of
Securities, to pay to the Trustee

                                                                            -29-

<PAGE>

any amount due to it for the reasonable compensation, expenses, disbursements
and advances of the Trustee, its agents and its counsel and any other amounts
due the Trustee under Section 5.7.

          Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder of a Security
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 of a Security in any such proceeding;
provided, however, that the Trustee may, on behalf of such Holders, vote for the
election of a trustee in bankruptcy or similar official.

          SECTION 4.5    Trustee May Enforce Claims without Possession of
Securities.

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

          SECTION 4.6    Application of Money Collected.

          Subject to Article Eleven, any money collected by the Trustee pursuant
to this Article Four shall be applied in the following order, at the date or
dates fixed by the Trustee and, in case of the distribution of such money on
account of principal, premium, if any, or interest, upon presentation of the
Securities and the notation thereon of the payment if only partially paid and
upon surrender thereof if fully paid:

          FIRST: To the payment of all amounts due the Trustee under
Section 5.7;

          SECOND: To the payment of the amounts then due and unpaid for
principal of, premium, if any, or interest on, the Securities in respect of
which or for the benefit of which such money has been collected, ratably,
without preference or priority of any kind, according to the amounts due and
payable on such Securities for principal, premium, if any, and interest,
respectively; and

          THIRD: Any remaining amounts shall be repaid to the Company.

          SECTION 4.7    Limitation on Suits.

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

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

                                                                            -30-

<PAGE>

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

               (c)  such Holder or Holders have offered to the Trustee
reasonable indemnity against the costs, expenses and liabilities to be incurred
in compliance with such request;

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

               (e)  the Trustee has not received any direction inconsistent with
such written request from the Holders of a majority of the aggregate principal
amount of the Outstanding Securities during the 60 day period referred to in (d)
above; it being understood and intended that no one or more of such Holders
shall have any right in any manner whatever by virtue of, or by availing of, any
provision of this Indenture to affect, disturb or prejudice the rights of any
other of such Holders, or to obtain or seek to obtain priority or preference
over any other of such Holders or to enforce any right under this Indenture,
except in the manner herein provided and for the equal and ratable benefit of
all such Holders.

          SECTION 4.8    Unconditional Right of Holders to Receive Principal,
Premium and Interest and to Convert.

          Notwithstanding any other provision in this Indenture, the Holder of
any Security shall have the right, which is absolute and unconditional, to
receive payment of the principal of, premium, if any, and (subject to Section
2.8) interest on such Security on the respective Stated Maturities expressed in
such Security (or, in the case of redemption or repurchase, on the Redemption
Date or Repurchase Date, as the case may be), and to convert such Security in
accordance with Article Ten, and to institute suit for the enforcement of any
such payment and right to convert, and such rights shall not be impaired without
the consent of such Holder.

          SECTION 4.9    Restoration of Rights and Remedies.

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

          SECTION 4.10   Rights and Remedies Cumulative.

          Except as otherwise provided with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities in the last paragraph
of Section 2.7, no right or remedy herein conferred upon or reserved to the
Trustee or to the Holders of Securities is intended to be exclusive

                                                                            -31-

<PAGE>

of any other right or remedy, and every right and remedy shall, to the extent
permitted by law, be cumulative and in addition to every other right and remedy
given hereunder or now or hereafter existing at law or in equity or otherwise.
The assertion or employment of any right or remedy hereunder, or otherwise,
shall not prevent the concurrent assertion or employment of any other
appropriate right or remedy.

          SECTION 4.11   Delay or Omission Not Waiver.

          No delay or omission of the Trustee or of any Holder of any Security
to exercise any right or remedy accruing upon any Event of Default shall impair
any such right or remedy or constitute a waiver of any such Event of Default or
any acquiescence therein. Every right and remedy given by this Article Four or
by law to the Trustee or to the Holders of Securities may be exercised from time
to time, and as often as may be deemed expedient, by the Trustee or (subject to
the limitations contained in this Indenture) by the Holders of Securities, as
the case may be.

          SECTION 4.12   Control by Holders of Securities.

          The Holders of a majority in principal amount of the Outstanding
Securities shall have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the Trustee or exercising
any trust or power conferred on the Trustee, provided that

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

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

          SECTION 4.13   Waiver of Past Defaults.

          The Holders, either (a) through the written consent of not less than a
majority in principal amount of the Outstanding Securities or (b) by the
adoption of a resolution, at a meeting of Holders of the Outstanding Securities
at which a quorum is present, by the Holders of at least a majority in principal
amount of the Outstanding Securities represented at such meeting, may on behalf
of the Holders of all the Securities waive any past default hereunder and its
consequences, except a default (1) in the payment of the principal of, premium,
if any, interest, or the Repurchase Price on any Security or (2) in respect of a
covenant or provision hereof that under Article Seven cannot be modified or
amended without the consent of the Holder of each Outstanding Security affected.

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

          SECTION 4.14   Undertaking for Costs.

                                                                            -32-

<PAGE>

          All parties to this Indenture agree, and each Holder of any Security
by his acceptance thereof shall be deemed to have agreed, that any court may in
its discretion require, in any suit for the enforcement of any right or remedy
under this Indenture, or in any suit against the Trustee for any action taken,
suffered or omitted by it as Trustee, the filing by any party litigant in such
suit of an undertaking to pay the costs of such suit, and that such court may in
its discretion assess reasonable costs, including reasonable attorneys' fees and
expenses, against any party litigant in such suit, having due regard to the
merits and good faith of the claims or defenses made by such party litigant; but
the provisions of this Section 4.14 shall not apply to any suit instituted by
the Company, to any suit instituted by the Trustee, to any suit instituted by
any Holder, or group of Holders, holding in the aggregate more than 10% in
principal amount of the Outstanding Securities, or to any suit instituted by any
Holder of any Security for the enforcement of the payment of the principal of,
premium, if any, or interest on any Security on or after the respective Stated
Maturity or Maturities expressed in such Security (or, in the case of redemption
or repurchase, on or after the Redemption Date or Repurchase Date, as the case
may be) or for the enforcement of the right to convert any Security in
accordance with Article Ten.

          SECTION 4.15   Waiver of Stay, Usury or Extension Laws.

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

                                  ARTICLE FIVE

                                   THE TRUSTEE

          SECTION 5.1    Certain Duties and Responsibilities.

               (a)  Except during the continuance of an Event of Default,

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

                    (2)       in the absence of bad faith on its part, the
Trustee may conclusively rely, as to the truth of the statements and the
correctness of the opinions expressed therein, upon certificates or opinions
furnished to the Trustee and conforming to the requirements of this Indenture;
but in the case of any such certificates or opinions that by any provision
hereof are specifically required to be furnished to the Trustee, the Trustee
shall be under a duty to examine the

                                                                            -33-

<PAGE>

same to determine whether or not they conform to the requirements of this
Indenture but not to verify the contents thereof.

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

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

                    (1)       this paragraph (c) shall not be construed to limit
the effect of paragraph (a) of this Section 5.1;

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

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

                    (4)       no provision of this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur any financial
liability in the performance of any of its duties hereunder, or in the exercise
of any of its rights or powers, if it shall have reasonable grounds for
believing that repayment of such funds or adequate indemnity against such risk
or liability is not reasonably assured to it.

               (d)  Whether or not therein expressly so provided, every
provision of this Indenture relating to the conduct or affecting the liability
of or affording protection to the Trustee shall be subject to the provisions of
this Section 5.1.

          SECTION 5.2    Notice of Defaults.

          Within 90 days after the occurrence of any default hereunder as to
which a Responsible Officer of the Trustee has actually received written notice,
the Trustee shall give to all Holders of Securities, in the manner provided in
Section 1.6, notice of such default, unless such default shall have been cured
or waived; provided, however, that, except in the case of a default in the
payment of the principal of, premium, if any, or interest on any Security, the
Trustee shall be protected in withholding such notice if and so long as the
board of directors, the executive committee or a trust committee of directors or
Responsible Officers of the Trustee in good faith determine that the withholding
of such notice is in the interest of the Holders. For the purpose of this
Section 5.2, the

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<PAGE>

term "default" means any event that is, or after notice or lapse of time or both
would become, an Event of Default.

          SECTION 5.3    Certain Rights of Trustee.

          Subject to the provisions of Section 5.1:

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

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

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

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

               (e)  the Trustee shall be under no obligation to exercise any of
the rights or powers vested in it by this Indenture at the request or direction
of any of the Holders of Securities pursuant to this Indenture, unless such
Holders shall have offered to the Trustee reasonable security or indemnity
against the costs, expenses and liabilities that might be incurred by it in
compliance with such request or direction;

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

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

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<PAGE>

          SECTION 5.4    Not Responsible for Recitals or Issuance of Securities.

          The recitals contained herein and in the Securities (except the
Trustee's certificates of authentication) shall be taken as the statements of
the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture, of the Securities or of the Common Stock issuable upon the conversion
of the Securities. The Trustee shall not be accountable for the use or
application by the Company of Securities or the proceeds thereof.

          SECTION 5.5    May Hold Securities, Act as Trustee under Other
Indentures.

          The Trustee, any Authenticating Agent, any Paying Agent, any
Conversion Agent or any other agent of the Company or the Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities
and may otherwise deal with the Company with the same rights it would have if it
were not Trustee, Authenticating Agent, Paying Agent, Conversion Agent or such
other agent.

          The Trustee may become and act as trustee under other indentures under
which other securities, or certificates of interest or participation in other
securities, of the Company are outstanding in the same manner as if it were not
Trustee hereunder.

          SECTION 5.6    Money Held in Trust.

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

          SECTION 5.7    Compensation and Reimbursement.

          The Company agrees

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

               (b)  to reimburse the Trustee upon its request for all reasonable
expenses, disbursements and advances incurred or made by the Trustee in
accordance with any provision of this Indenture (including the reasonable
compensation and the expenses and disbursements of its agents and counsel),
except any such expense, disbursement or advance as may be attributable to its
negligence or bad faith; and

               (c)  to indemnify the Trustee (and its directors, officers,
employees and agents) for, and to hold it harmless against, any and all loss,
damage, claim, liability or expense, including taxes (other than taxes based on
the income of the Trustee), incurred without negligence, bad faith or

                                                                            -36-

<PAGE>

willful misconduct on its part, arising out of or in connection with the
acceptance or administration of this trust, including the reasonable costs,
expenses and reasonable attorneys' fees of defending itself against any claim or
liability in connection with the exercise or performance of any of its powers or
duties hereunder.

          When the Trustee incurs expenses or renders services in connection
with an Event of Default specified in Section 4.1(f) or Section 4.1(g) with
respect to the Company, the expenses (including the reasonable charges of its
counsel) and the compensation for the services are intended to constitute
expenses of the administration under any applicable federal or state bankruptcy,
insolvency or other similar law.

          The Trustee shall have a lien prior to the Securities as to all
property and funds held by it hereunder for any amount owing it or any
predecessor Trustee pursuant to this Section 5.7, except with respect to funds
held in trust for the benefit of the Holders of particular Securities.

          The provisions of this Section 5.7 shall survive the termination of
this Indenture or the earlier resignation or removal of the Trustee.

          SECTION 5.8    Corporate Trustee Required; Eligibility.

          There shall at all times be a Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such,
having a combined capital and surplus (or for such purposes, the combined
capital and surplus of any parent holding company) of at least U.S. $25,000,000,
subject to supervision or examination by federal or state authority, in good
standing and having an established place of business or agency in the Borough of
Manhattan, The City of New York. If such corporation publishes reports of
condition at least annually, pursuant to law or to the requirements of said
supervising or examining authority, then for the purposes of this Section 5.8,
the combined capital and surplus of such corporation shall be deemed to be its
combined capital and surplus as set forth in its most recent report of condition
so published. If at any time the Trustee shall cease to be eligible in
accordance with the provisions of this Section 5.8, it shall resign immediately
in the manner and with the effect hereinafter specified in this Article and a
successor shall be appointed pursuant to Section 5.9.

          SECTION 5.9    Resignation and Removal; Appointment of Successor.

               (a)  No resignation or removal of the Trustee and no appointment
of a successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 5.10.

               (b)  The Trustee may resign at any time by giving written notice
thereof to the Company. If the instrument of acceptance by a successor Trustee
required by Section 5.10 shall not have been delivered to the Trustee within 30
days after the giving of such notice of resignation, the resigning Trustee or
the Company may petition any court of competent jurisdiction for the appointment
of a successor Trustee.

                                                                            -37-

<PAGE>

               (c)  The Trustee may be removed at any time by Act of the Holders
of a majority in principal amount of the Outstanding Securities, delivered to
the Trustee and the Company. If the instrument of acceptance by a successor
Trustee required by Section 5.10 shall not have been delivered to the Trustee
within 30 days after the giving of such notice of removal, the removed Trustee
or the Company may petition any court of competent jurisdiction for the
appointment of a successor Trustee.

               (d)  If at any time:

                    (1)       the Trustee shall cease to be eligible under
Section 5.8 and shall fail to resign after written request therefor by the
Company or by any Holder of a Security who has been a bona fide Holder of a
Security for at least six months, or

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

then, (i) in any such case the Company may remove the Trustee, or (ii) in the
case of clause (d)(1) above only and subject to Section 4.14, any Holder of a
Security who has been a bona fide Holder of a Security for at least six months
may, on behalf of himself and all others similarly situated, petition any court
of competent jurisdiction for the removal of the Trustee and the appointment of
a successor Trustee.

               (e)  If the Trustee shall resign, be removed or become incapable
of acting, or if a vacancy shall occur in the office of Trustee for any cause,
the Company shall promptly appoint a successor Trustee and shall comply with the
applicable requirements of this Section 5.9 and Section 5.10. If, within one
year after such resignation, removal or incapability, or occurrence of such
vacancy, a successor Trustee shall be appointed by Act of the Holders of a
majority in principal amount of the Outstanding Securities delivered to the
Company and the retiring Trustee, the successor Trustee so appointed shall,
forthwith upon its acceptance of such appointment in accordance with the
applicable requirements of Section 5.10, become the successor Trustee and
supersede the successor Trustee appointed by the Company. If no successor
Trustee shall have been so appointed by the Company or the Holders of Securities
and accepted appointment in the manner required by this Section 5.9 and Section
5.10, any Holder of a Security who has been a bona fide Holder of a Security for
at least six months may, on behalf of himself and all others similarly situated,
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

               (f)  The successor Trustee shall give notice of each resignation
and each removal of the Trustee and each appointment of a successor Trustee to
all Holders of Securities in the manner provided in Section 1.6. Each notice
shall include the name of the successor Trustee and the address of its Corporate
Trust Office.

          SECTION 5.10   Acceptance of Appointment by Successor.

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<PAGE>

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

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

          SECTION 5.11   Merger, Conversion, Consolidation or Succession to
Business.

          Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all of the corporate trust
business of the Trustee, shall be the successor of the Trustee hereunder
(provided such corporation shall be otherwise eligible under this Article),
without the execution or filing of any paper or any further act on the part of
any of the parties hereto. In case any Securities shall have been authenticated,
but not delivered, by the Trustee then in office, any successor by merger,
conversion or consolidation to such authenticating Trustee may adopt such
authentication and deliver the Securities so authenticated with the same effect
as if such successor Trustee had itself authenticated such Securities.

          SECTION 5.12   Authenticating Agents.

          The Trustee may, with the consent of the Company, appoint an
Authenticating Agent or Agents acceptable to the Company with respect to the
Securities, which shall be authorized to act on behalf of the Trustee to
authenticate Securities issued upon exchange or substitution pursuant to this
Indenture.

          Securities authenticated by an Authenticating Agent shall be entitled
to the benefits of this Indenture and shall be valid and obligatory for all
purposes as if authenticated by the Trustee hereunder, and every reference in
this Indenture to the authentication and delivery of Securities by the Trustee
or the Trustee's certificate of authentication shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent. Each Authenticating Agent shall be subject to acceptance
by the Company and shall at all times be a corporation organized and doing
business under the laws of the United States of America, any state thereof or
the District of Columbia, authorized under such laws to act as Authenticating
Agent and subject to supervision or examination by government or other fiscal
authority. If at any time an Authenticating Agent shall

                                                                            -39-

<PAGE>

cease to be eligible in accordance with the provisions of this Section 5.12,
such Authenticating Agent shall resign immediately in the manner and with the
effect specified in this Section 5.12.

          Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent (provided such corporation shall be otherwise eligible
under this Section 5.12), without the execution or filing of any paper or any
further act on the part of the Trustee or the Authenticating Agent.

          An Authenticating Agent may resign at any time by giving written
notice thereof to the Trustee and to the Company. The Trustee may at any time
terminate the agency of an Authenticating Agent by giving written notice thereof
to such Authenticating Agent and to the Company. Upon receiving such a notice of
resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section 5.12, the Trustee may appoint a successor

          Authenticating Agent, which shall be subject to acceptance by the
Company. Any successor Authenticating Agent, upon acceptance of its appointment
hereunder, shall become vested with all the rights, powers and duties of its
predecessor hereunder, with like effect as if originally named as an
Authenticating Agent. No successor Authenticating Agent shall be appointed
unless eligible under the provisions of this Section 5.12.

          The Company agrees to pay to each Authenticating Agent from time to
time reasonable compensation for its services under this Section 5.12.

          If an Authenticating Agent is appointed with respect to the Securities
pursuant to this Section 5.12, the Securities may have endorsed thereon, in
addition to or in lieu of the Trustee's certification of authentication, an
alternative certificate of authentication in the following form:

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

          By: State Street Bank and Trust Company of California, N.A., as
          Authenticating Agent

          By
             ----------------------------------------
          Authorized Signature

          SECTION 5.13   Disqualification; Conflicting Interests.

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

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<PAGE>

          SECTION 5.14   Preferential Collection of Claims Against Company.

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

                                   ARTICLE SIX

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

          SECTION 6.1    Company May Consolidate, Etc., Only on Certain Terms.

          The Company shall not consolidate with or merge into any other Person
or convey, transfer or lease its properties and assets substantially as an
entirety to any Person, and the Company shall not permit any Person to
consolidate with or merge into it or convey, transfer, sell or lease such
Person's properties and assets substantially as an entirety to it, unless:

               (a)  the Person formed by such consolidation or into or with
which the Company is merged, or the Person to which the Company's properties and
assets are conveyed, transferred, sold or leased, shall be (1) a corporation,
limited liability company, partnership or trust organized and validly existing
under the laws of the United States of America, any state thereof or the
District of Columbia or (2) organized under the laws of a jurisdiction outside
the United States of America and have common stock or American Depositary Shares
representing such common stock traded on a national securities exchange in the
United States, including The Nasdaq Stock Market, Inc., and, in each case, if
other than the Company, shall expressly assume, by an indenture supplemental
hereto, executed and delivered to the Trustee, in form satisfactory to the
Trustee, the due and punctual payment of the principal of, premium, and interest
on all of the Securities as applicable, and the performance or observance of
every covenant of this Indenture on the part of the Company to be performed or
observed;

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

               (c)  the Company has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that such consolidation,
merger, conveyance, transfer or lease and, if a supplemental indenture is
required in connection with such transaction, such supplemental indenture,
comply with this Article and that all conditions precedent herein provided for
relating to such transaction have been complied with, together with any
documents required under Section 7.3.

          SECTION 6.2    Successor Substituted.

          Upon any consolidation of the Company with, or merger of the Company
into, any other Person or any conveyance, transfer or lease of all or
substantially all the properties and assets of the Company in accordance with
Section 6.1, the successor Person formed by such consolidation or into

                                                                            -41-

<PAGE>

or with which the Company is merged or to which such conveyance, transfer or
lease is made shall succeed to, and be substituted for, and may exercise every
right and power of, the Company under this Indenture with the same effect as if
such successor Person had been named as the Company herein, and thereafter,
except in the case of a lease, the predecessor Person shall be relieved of all
obligations and covenants under this Indenture and the Securities.

                                  ARTICLE SEVEN

                             SUPPLEMENTAL INDENTURES

          SECTION 7.1    Supplemental Indentures without Consent of Holders of
Securities.

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

               (a)  to evidence the succession of another Person to the Company
and the assumption by any such successor of the covenants and obligations of the
Company herein and in the Securities as permitted by this Indenture; or

               (b)  to add to the covenants of the Company for the benefit of
the Holders of Securities or to surrender any right or power herein conferred
upon the Company; or

               (c)  to secure the Securities; or

               (d)  to make provision with respect to the conversion rights of
Holders of Securities pursuant to Section 10.11; or

               (e)  to comply with the requirements of the Trust Indenture Act
or the rules and regulations of the Commission thereunder in order to effect or
maintain the qualification of this Indenture under the Trust Indenture Act, as
contemplated by this Indenture or otherwise; or

               (f)  to evidence and provide for the acceptance of appointment
hereunder by a successor Trustee; or

               (g)  to cure any ambiguity, to correct or supplement any
provision herein that may be inconsistent with any other provision herein or
that is otherwise defective, or to make any other provisions with respect to
matters or questions arising under this Indenture as the Company and the Trustee
may deem necessary or desirable (provided such action pursuant to this clause
(h) shall not, in the judgment of the Company, adversely affect the interests of
the Holders of Securities in any material respect).

          Upon Company Request accompanied by a Board Resolution authorizing the
execution of any such supplemental indenture, and subject to and upon receipt by
the Trustee of the documents described in Section 7.3 hereof, the Trustee shall
join with the Company in the execution of any

                                                                            -42-

<PAGE>

supplemental indenture authorized or permitted by the terms of this Indenture
and to make any further appropriate agreements and stipulations that may be
therein contained.

          SECTION 7.2    Supplemental Indentures with Consent of Holders of
Securities.

          With either (a) the written consent of the Holders of not less than a
majority in principal amount of the Outstanding Securities, by the Act of said
Holders delivered to the Company and the Trustee, or (b) by the adoption of a
resolution, at a meeting of Holders of the Outstanding Securities at which a
quorum is present, by the Holders of a majority in principal amount of the
Outstanding Securities represented at such meeting, the Company, when authorized
by a Board Resolution, and the Trustee may enter into an indenture or indentures
supplemental hereto for the purpose of adding any provisions to or changing in
any manner or eliminating any of the provisions of this Indenture or of
modifying in any manner the rights of the Holders of Securities under this
Indenture; provided, however, that no such supplemental indenture shall, without
the consent or affirmative vote of the Holder of each Outstanding Security
affected thereby,

                    (1)       change the Stated Maturity of the principal of, or
any installment of interest on, any Security, or reduce the principal amount,
any premium or the rate of interest payable thereon, or change the place at
which or the coin or currency in which any Security or the interest or any
premium thereon or any other amount in respect thereof is payable; or

                    (2)       reduce the amount payable on any Security upon
redemption at the Company's option; or

                    (3)       impair the right to institute suit for the
enforcement of any payment in respect of any Security on or after the Stated
Maturity thereof (or, in the case of redemption or any repurchase, on or after
the Redemption Date or Repurchase Date, as the case may be); or

                    (4)       except as permitted by Section 10.11, adversely
affect the right to convert any Security as provided in Article Ten; or

                    (5)       modify the provisions of this Indenture with
respect to the subordination of the Securities in a manner adverse to the
Holders of any Securities; or

                    (6)       reduce the percentage in principal amount of the
Outstanding Securities the consent of whose Holders is required for any
supplemental indenture to modify or amend any provision of this Indenture or the
consent of whose Holders is required for any waiver (of compliance with certain
provisions of this Indenture or certain defaults hereunder and their
consequences) provided for in this Indenture; or

                    (7)       modify any of the provisions of this Section 7.2
except to increase any percentage contained herein or therein or to provide that
certain other provisions of this Indenture cannot be modified or waived without
the consent of the Holder of each Outstanding Security affected thereby; or

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<PAGE>

                    (8)       amend or modify the provisions of Article Twelve
in a manner adverse to the Holders after the Holder's right to require the
Company to repurchase the Securities upon a Change in Control arises.

          It shall not be necessary for any Act of Holders of Securities under
this Section 7.2 to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such Act shall approve the substance
thereof.

          The quorum at any meeting called to adopt a resolution shall be
Holders representing a majority in aggregate principal amount of Securities at
the time Outstanding.

          SECTION 7.3    Execution of Supplemental Indentures.

          In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Sections 5.1 and 5.3) shall be fully protected in relying upon,
an Opinion of Counsel stating that the execution of such supplemental indenture
is authorized or permitted by this Indenture and that such supplemental
indenture has been duly authorized, executed and delivered by the Company and
constitutes a valid and legally binding obligation of the Company enforceable
against the Company in accordance with its terms. The Trustee may, but shall not
be obligated to, enter into any such supplemental indenture that affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

          SECTION 7.4    Effect of Supplemental Indentures.

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

          SECTION 7.5    Reference in Securities to Supplemental Indentures.

          Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article may, and shall if required by
the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplemental indenture. If the Company shall so determine,
new Securities so modified as to conform, in the opinion of the Company and the
Trustee, to any such supplemental indenture may be prepared and executed by the
Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities.

          SECTION 7.6    Notice of Supplemental Indentures.

          Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of Section 7.2, the Company
shall give notice to all Holders of Securities of such fact, setting forth in
general terms the substance of such supplemental indenture, in the

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<PAGE>

manner provided in Section 1.6. Any failure of the Company to give such notice,
or any defect therein, shall not in any way impair or affect the validity of any
such supplemental indenture.

                                 ARTICLE EIGHT

                                    COVENANTS

          SECTION 8.1    Payment of Principal, Premium and Interest.

          The Company covenants and agrees that it will duly and punctually pay
the principal of and premium, if any, and interest on the Securities in
accordance with the terms of the Securities and this Indenture. The Company
shall deposit or cause to be deposited with the Trustee, no later than 12:00
noon Eastern time on the date of the Stated Maturity of any Security or no later
than 12:00 noon Eastern time on the due date for any installment of interest,
all payments so due, which payments shall be in immediately available funds on
the date of such Stated Maturity or due date, as the case may be.

          SECTION 8.2    Maintenance of Offices or Agencies.

          The Company hereby appoints the Corporate Trust Office or such other
office or agency of the Trustee as its agent in the Borough of Manhattan, The
City of New York, where Securities may be presented or surrendered for payment,
where Securities may be surrendered for registration of transfer or exchange,
where Securities may be surrendered for conversion, and where notices and
demands to or upon the Company in respect of the Securities and this Indenture
may be served.

          The Company may at any time and from time to time vary or terminate
the appointment of any such agent or appoint any additional agents for any or
all of such purposes; provided, however, that until all of the Securities have
been delivered to the Trustee for cancellation, or moneys sufficient to pay the
principal of, premium, if any, and interest on the Securities have been made
available for payment and either paid or returned to the Company pursuant to the
provisions of Section 8.3, the Company shall maintain in the Borough of
Manhattan, The City of New York, an office or agency where Securities may be
presented or surrendered for payment and conversion, where Securities may be
surrendered for registration of transfer or exchange and where notices and
demands to or upon the Company in respect of the Securities and this Indenture
may be served. The Company shall give prompt written notice to the Trustee, and
notice to the Holders in accordance with Section 1.6, of the appointment or
termination of any such agents and of the location and any change in the
location of any 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,
presentations and surrenders may be made and notices and demands may be served
on the Corporate Trust Office.

                                                                            -45-

<PAGE>

          SECTION 8.3    Money for Security Payments to Be Held in Trust.

          If the Company will act as its own Paying Agent, it shall, on or
before each due date of the principal of, premium, if any, or interest on any of
the Securities, segregate and hold in trust for the benefit of the Persons
entitled thereto a sum sufficient to pay the principal, premium, if any, or
interest so becoming due until such sums shall be paid to such Persons or
otherwise disposed of as herein provided, and the Company will promptly notify
the Trustee of its action or failure so to act.

          Whenever the Company shall have one or more Paying Agents, it will, no
later than 12:00 noon Eastern time on each due date of the principal of,
premium, if any, or interest on any Securities, deposit with the Trustee a sum
sufficient to pay the principal, premium, if any, or interest so becoming due,
such sum to be held for the benefit of the Persons entitled to such principal,
premium, if any, or interest, and (unless such Paying Agent is the Trustee) the
Company will promptly notify the Trustee of any failure so to act.

          The Company will cause each Paying Agent other than the Trustee to
execute and deliver to the Trustee an instrument in which such Paying Agent
shall agree with the Trustee, subject to the provisions of this Section 8.3,
that such Paying Agent will:

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

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

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

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

          Anything contained herein to the contrary notwithstanding, any money
held by the Trustee or any Paying Agent in trust for the payment and discharge
of the principal of, premium, if any, or interest on any Security that remains
unclaimed for two years after the date when each payment of such principal,
premium, or interest has become payable shall, upon the request of the Company,
be repaid by the Trustee to the Company as its absolute property free from
trust, and the Trustee shall thereupon be released and discharged with respect
thereto and the Holders shall look only to the Company for the payment of the
principal, premium or interest on such Security. The Trustee shall not be liable
to the Company or any Holder for interest on funds held by it for the payment
and discharge of the principal, premium or interest on any of the Securities to
any Holder. The Company

                                                                            -46-

<PAGE>

shall not be liable for any interest on the sums paid to it pursuant to this
paragraph and shall not be regarded as a trustee of such money.

          SECTION 8.4    Existence.

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

          SECTION 8.5    Statement by Officers as to Default.

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

          The Company will deliver to the Trustee, forthwith upon becoming aware
of any default in the performance or observance of any covenant, agreement or
condition contained in this Indenture, or any Event of Default, an Officers'
Certificate specifying with particularity such default or Event of Default and
further stating what action the Company has taken, is taking or proposes to take
with respect thereto.

          Any notice required to be given under this Section 8.5 shall be
delivered to the Trustee at the Corporate Trust Office.

          SECTION 8.6    Delivery of Certain Information.

          At any time when the Company is not subject to Section 13 or 15(d) of
the Exchange Act, upon the request of a Holder of a Security or the holder of
shares of Common Stock issued upon conversion thereof, the Company will promptly
furnish or cause to be furnished Rule 144A Information to such Holder of
Securities or such holder of shares of Common Stock issued upon conversion of
Securities, or to a prospective purchaser of any such security designated by any
such Holder or holder, as the case may be, to the extent required to permit
compliance by such Holder or holder with Rule 144A under the Securities Act (or
any successor provision thereto) in connection with the resale of any such
security; provided, however, that the Company shall not be required to furnish
such information in connection with any request made on or after the date that
is two years from the later of (a) the date such a security (or any such
predecessor security) was last acquired from the Company or (b) the date such a
security (or any such predecessor security) was last

                                                                            -47-

<PAGE>

acquired from an "affiliate" of the Company within the meaning of Rule 144 under
the Securities Act (or any successor provision thereto). "Rule 144A Information"
shall be such information as is specified pursuant to Rule 144A(d)(4) under the
Securities Act (or any successor provision thereto).

                                  ARTICLE NINE

                            REDEMPTION OF SECURITIES

          SECTION 9.1    Right of Redemption.

          The Securities may be redeemed in accordance with the provisions of
the form of Securities attached hereto as Exhibit A.

          SECTION 9.2    Applicability of Article.

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

          SECTION 9.3    Election to Redeem; Notice to Trustee.

          In case of any redemption at the election of the Company of any of the
Securities, the Company shall, at least 35 days prior to the Redemption Date
fixed by the Company (unless a shorter notice shall be satisfactory to the
Trustee), notify the Trustee in writing of such Redemption Date.

          SECTION 9.4    Selection by Trustee of Securities to Be Redeemed.

          If less than all the Securities are to be redeemed, the particular
Securities to be redeemed shall be selected by the Trustee at least three
Business Days prior to the date that the notice described in Section 9.5 is
given from the Outstanding Securities not previously called for redemption by
lot or such method as the Trustee may deem fair and appropriate.

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

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

          For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Securities redeemed or to be

                                                                            -48-

<PAGE>

redeemed only in part, to the portion of the principal amount of such Securities
that has been or is to be redeemed.

          SECTION 9.5    Notice of Redemption.

          Notice of redemption shall be given in the manner provided in Section
1.6 to the Holders of Securities to be redeemed not less than 30 nor more than
60 days prior to the Redemption Date, and such notice shall be irrevocable.

          All notices of redemption shall identify the Securities to be redeemed
(including CUSIP numbers) and shall state:

               (a)  the Redemption Date,

               (b)  the Redemption Price, and accrued interest, if any,

               (c)  if less than all Outstanding Securities are to be redeemed,
the aggregate principal amount of Securities to be redeemed,

               (d)  that on the Redemption Date the Redemption Price, and
accrued interest, if any, will become due and payable upon each such Security to
be redeemed, and that interest thereon shall cease to accrue on and after said
date,

               (e)  the Conversion Rate, the date on which the right to convert
the Securities to be redeemed will terminate and the places where such
Securities may be surrendered for conversion, and

               (f)  the place or places where such Securities are to be
surrendered for payment of the Redemption Price and accrued interest, if any.

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

          SECTION 9.6    Deposit of Redemption Price.

          Not less than one Business Day prior to any Redemption Date, the
Company shall deposit with the Trustee (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 8.3) an amount
of money (which shall be in immediately available funds on such Redemption Date)
sufficient to pay the Redemption Price of, and (except if the Redemption Date
shall be an Interest Payment Date) accrued interest on, all the Securities that
are to be redeemed on that date other than any Securities called for redemption
on that date that have been converted prior to the date of such deposit.

                                                                            -49-

<PAGE>

          If any Security called for redemption is converted, any money
deposited with the Trustee or so segregated and held in trust for the redemption
of such Security shall (subject to any right of the Holder or such Security or
any Predecessor Security to receive interest as provided in the last paragraph
of Section 2.8) be paid to the Company on Company Request or, if then held by
the Company, shall be discharged from such trust.

          SECTION 9.7    Securities Payable on Redemption Date.

          Notice of redemption having been given as aforesaid, the Securities to
be so redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price, including accrued
interest) such Securities shall cease to bear interest. Upon surrender of any
Security for redemption in accordance with said notice, such Security shall be
paid by the Company at the Redemption Price together with accrued and unpaid
interest to the Redemption Date; provided, however, that installments of
interest on Securities whose Stated Maturity is on or prior to the Redemption
Date shall be payable to the Holders of such Securities, or one or more
Predecessor Securities, registered as such on the relevant Record Date according
to their terms and the provisions of Section 2.8.

          If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal amount of, premium, if any, and,
to the extent permitted by applicable law, accrued interest on such Security
shall, until paid, bear interest from the Redemption Date at the rate then in
effect, and such Security shall remain convertible until the principal of such
Security (or portion thereof, as the case may be) shall have been paid or duly
provided for.

          SECTION 9.8    Securities Redeemed in Part.

          Any Security that is to be redeemed only in part shall be surrendered
at an office or agency of the Company designated for that purpose pursuant to
Section 8.2 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company and
the Trustee duly executed by, the Holder thereof or his attorney duly authorized
in writing), and the Company shall execute, and the Trustee shall authenticate
and make available for delivery to the Holder of such Security without service
charge, a new Registered Security or Securities, of any authorized denomination
as requested by such Holder, in aggregate principal amount equal to and in
exchange for the unredeemed portion of the principal of the Security so
surrendered.

          SECTION 9.9    Conversion Arrangement on Call for Redemption.

          In connection with any redemption of the Securities, the Company may
arrange for the purchase and conversion of any Securities by an agreement with
one or more investment bankers or other purchasers (the "Purchasers") to
purchase such Securities by paying to the Trustee in trust for the Holders, on
or before the Redemption Date, an amount not less than the applicable Redemption
Price, together with interest accrued and unpaid to the Redemption Date, of such
Securities. Notwithstanding anything to the contrary contained in this Article
Nine, the obligation of the

                                                                            -50-

<PAGE>

Company to pay the Redemption Price, together with interest accrued and unpaid
to the Redemption Date, shall be deemed to be satisfied and discharged to the
extent such amount is so paid by such Purchasers. If such an agreement is
entered into (a copy of which shall be filed with the Trustee prior to the close
of business on the second Business Day immediately prior to the Redemption
Date), any Securities called for redemption that are not duly surrendered for
conversion by the Holders thereof may, at the option of the Company, be deemed,
to the fullest extent permitted by law, and consistent with any agreement or
agreements with such Purchasers, to be acquired by such Purchasers from such
Holders and (notwithstanding anything to the contrary contained in this Article
Nine) surrendered by such Purchasers for conversion, all as of immediately prior
to the close of business on the Redemption Date (and the right to convert any
such Securities shall be extended through such time), subject to payment of the
above amount as aforesaid. At the direction of the Company, the Trustee shall
hold and dispose of any such amount paid to it by the Purchasers to the Holders
in the same manner as it would monies deposited with it by the Company for the
redemption of Securities. Without the Trustee's prior written consent, no
arrangement between the Company and such Purchasers for the purchase and
conversion of any Securities shall increase or otherwise affect any of the
powers, duties, responsibilities or obligations of the Trustee as set forth in
this Indenture, and the Company agrees to indemnify the Trustee from, and hold
it harmless against, any loss, liability or expense arising out of or in
connection with any such arrangement for the purchase and conversion of any
Securities between the Company and such Purchasers, including the costs and
expenses, including reasonable legal fees, incurred by the Trustee in the
defense of any claim or liability arising out of or in connection with the
exercise or performance of any of its powers, duties, responsibilities or
obligations under this Indenture.

                                   ARTICLE TEN

                            CONVERSION OF SECURITIES

          SECTION 10.1   Conversion Privilege and Conversion Rate.

          Subject to and upon compliance with the provisions of this Article, at
the option of the Holder thereof, any Security or any portion of the principal
amount thereof that is U.S.$l,000 or an integral multiple of U.S.$1,000 may be
converted into fully paid and nonassessable shares (calculated as to each
conversion to the nearest 1/100th of a share) of Common Stock of the Company at
the Conversion Rate, determined as hereinafter provided, in effect at the time
of conversion. Such conversion right shall commence upon the original issuance
of the Securities and expire at the close of business on June 15, 2008, unless
the Security has been previously redeemed or repurchased, subject, in the case
of conversion of any Global Security, to any Applicable Procedures. In case a
Security or portion thereof is called for redemption at the election of the
Company or the Holder thereof exercises his right to require the Company to
repurchase the Security, such conversion right in respect of the Security, or
portion thereof so called, shall expire at the close of business on the Business
Day immediately preceding the Redemption Date or the Repurchase Date, as the
case may be, unless the Company defaults in making the payment due upon
redemption or repurchase, as the case may be (in each case subject, as
aforesaid, to any Applicable Procedures with respect to any Global Security).

                                                                            -51-

<PAGE>

          The rate at which shares of Common Stock shall be delivered upon
conversion (herein called the "Conversion Rate") shall be initially 100.0 shares
of Common Stock for each U.S.$l,000 principal amount of Securities. The
Conversion Rate shall be adjusted in certain instances as provided in this
Article Ten.

          SECTION 10.2   Exercise of Conversion Privilege.

          In order to exercise the conversion privilege, the Holder of any
Security to be converted shall surrender such Security, duly endorsed or
assigned to the Company or in blank, at any office or agency of the Company
maintained for that purpose pursuant to Section 8.2, accompanied by a duly
signed and completed conversion notice substantially in the form attached hereto
as Exhibit C stating that the Holder elects to convert such Security or, if less
than the entire principal amount thereof is to be converted, the portion thereof
to be converted. Each Security surrendered for conversion (in whole or in part)
during the period from the close of business on any Regular Record Date next
preceding any Interest Payment Date to the opening of business on such Interest
Payment Date shall (except in the case of any Security or portion thereof that
has been called for redemption on a Redemption Date, or is to be repurchased on
a Repurchase Date, with the consequence that the conversion right of such
Security would terminate between such Regular Record Date and the close of
business on such Interest Payment Date) be accompanied by payment in New York
Clearing House funds or other funds acceptable to the Company of an amount equal
to the interest payable on such Interest Payment Date on the principal amount of
such Security (or part thereof, as the case may be) being surrendered for
conversion. The interest so payable on such Interest Payment Date, with respect
to any Security (or portion thereof, if applicable) that is surrendered for
conversion during the period from the close of business on any Record Date next
preceding any Interest Payment Date to the opening of business on such Interest
Payment Date, shall be paid to the Holder of such Security as of such Regular
Record Date. Interest payable in respect of any Security surrendered for
conversion on or after an Interest Payment Date shall be paid to the Holder of
such Security as of the next preceding Regular Record Date, notwithstanding the
exercise of the right of conversion. Except as provided in this paragraph and
subject to the last paragraph of Section 2.8, no cash payment or adjustment
shall be made upon any conversion on account of any interest accrued from the
Interest Payment Date next preceding the conversion date, in respect of any
Security (or part thereof, as the case may be) surrendered for conversion, or on
account of any dividends on the Common Stock issued upon conversion. The
Company's delivery to the Holder of the number of shares of Common Stock (and
cash in lieu of fractions thereof, as provided in this Indenture) into which a
Security is convertible and any rights and warrants pursuant to Section 10.4(m)
will be deemed to satisfy the Company's obligation to pay the principal amount
of the Security.

          Securities shall be deemed to have been converted on the day of
surrender of such Securities for conversion in accordance with the foregoing
provisions, and at such time the rights of the Holders of such Securities as
Holders shall cease, and the Person or Persons entitled to receive the Common
Stock issuable upon conversion shall be treated for all purposes as the record
holder or holders of such Common Stock at such time. As promptly as practicable
on or after the conversion date, the Company shall issue and deliver to the
Trustee, for delivery to the Holder, a certificate or

                                                                            -52-

<PAGE>

certificates for the number of full shares of Common Stock issuable upon
conversion, together with payment in lieu of any fraction of a share, as
provided in Section 10.3.

          In the case of any Security that is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and make
available for delivery to the Holder thereof, at the expense of the Company, a
new Registered Security or Securities of authorized denominations in an
aggregate principal amount equal to the unconverted portion of the principal
amount of such Security. A Security may be converted in part, but only if the
principal amount of such Security to be converted is any integral multiple of
U.S.$1,000 and the principal amount of such security to remain Outstanding after
such conversion is equal to U.S.$l,000 or any integral multiple of U.S.$l,000 in
excess thereof.

          SECTION 10.3   Fractions of Shares.

          No fractional shares of Common Stock shall be issued upon conversion
of any Security or Securities. If more than one Security shall be surrendered
for conversion at one time by the same Holder, the number of full shares that
shall be issuable upon conversion thereof shall be computed on the basis of the
aggregate principal amount of the Securities (or specified portions thereof) so
surrendered. Instead of any fractional share of Common Stock that would
otherwise be issuable upon conversion of any Security or Securities (or
specified portions thereof), the Company shall calculate and pay a cash
adjustment in respect of such fraction (calculated to the nearest 1/100th of a
share) in an amount equal to the same fraction of the Average Sales Price Per
Share at the close of business on the day of conversion.

          SECTION 10.4   Adjustment of Conversion Rate.

          The Conversion Rate shall be subject to adjustments from time to time
as follows:

               (a)  In case the Company shall pay or make a dividend or other
distribution on any class of capital stock of the Company payable in shares of
Common Stock, the Conversion Rate in effect at the opening of business on the
day following the date fixed for the determination of stockholders entitled to
receive such dividend or other distribution shall be increased by dividing such
Conversion Rate by a fraction of which the numerator shall be the number of
shares of Common Stock outstanding at the close of business on the date fixed
for such determination and the denominator shall be the sum of such number of
shares and the total number of shares constituting such dividend or other
distribution, such increase to become effective (subject to paragraph (l) of
this Section 10.4) immediately after the opening of business on the day
following the date fixed for such determination. For the purposes of this
paragraph (a), the number of shares of Common Stock at any time outstanding
shall not include shares held in the treasury of the Company but shall include
shares issuable in respect of scrip certificates issued in lieu of fractions of
shares of Common Stock. The Company will not pay any dividend or make any
distribution on shares of Common Stock held in the treasury of the Company.

               (b)  In case the Company shall issue rights, options or warrants
to all holders of its Common Stock entitling them to subscribe for or purchase
shares of Common Stock at a price per

                                                                            -53-

<PAGE>

share less than the current market price per share (determined as provided in
paragraph (h) of this Section 10.4) of the Common Stock on the date fixed for
the determination of stockholders entitled to receive such rights, options or
warrants (other than any rights, options or warrants (1) that by their terms
will also be issued to any Holder upon conversion of a Security into shares of
Common Stock without any action required by the Company or any other Person or
(2) that are only exercisable upon the occurrence of specified triggering event
and such triggering event has not occurred), the Conversion Rate in effect at
the opening of business on the day following the date fixed for such
determination shall be increased by dividing such Conversion Rate by a fraction
of which the numerator shall be the number of shares of Common Stock outstanding
at the close of business on the date fixed for such determination plus the
number of shares of Common Stock which the aggregate of the offering price of
the total number of shares of Common Stock so offered for subscription or
purchase would purchase at such current market price and the denominator shall
be the number of shares of Common Stock outstanding at the close of business on
the date fixed for such determination plus the number of shares of Common Stock
so offered for subscription or purchase, such increase to become effective
(subject to paragraph (l) of this Section 10.4) immediately after the opening of
business on the day following the date fixed for such determination. For the
purposes of this paragraph (b), the number of shares of Common Stock at any time
outstanding shall not include shares held in the treasury of the Company but
shall include shares issuable in respect of scrip certificates issued in lieu of
fractions of shares of Common Stock. The Company will not issue any rights,
options or warrants in respect of shares of Common Stock held in the treasury of
the Company.

               (c)  In case outstanding shares of Common Stock shall be
subdivided into a greater number of shares of Common Stock, the Conversion Rate
in effect at the opening of business on the day following the day upon which
such subdivision becomes effective shall be proportionately increased, and,
conversely, in case outstanding shares of Common Stock shall each be combined
into a smaller number of shares of Common Stock, the Conversion Rate in effect
at the opening of business on the day following the day upon which such
combination becomes effective shall be proportionately reduced, such increase or
reduction, 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 evidences of its indebtedness,
shares of any class of capital stock, or other property (including cash or
assets or securities, but excluding (1) any rights, options or warrants referred
to in paragraph (b) of this Section 10.4 and the distribution of rights to all
holders of Common Stock pursuant to the adoption of a stockholders' rights plan
or the detachment of such rights under the terms of such stockholders' rights
plan, (2) any dividend or distribution paid in cash, except as set forth in
paragraphs (e) and (f) of this Section 10.4, (3) any dividend or distribution
referred to in paragraph (a) of this Section 10.4 and (4) any merger or
consolidation to which Section 10.11 applies), the Conversion Rate shall be
adjusted so that the same shall equal the rate determined by dividing the
Conversion Rate in effect immediately prior to the close of business on the date
fixed for the determination of stockholders entitled to receive such
distribution by a fraction of which the numerator shall be the current market
price per share (determined as provided in

                                                                            -54-

<PAGE>

paragraph (h) of this Section 10.4) of the Common Stock on the date fixed for
such determination less the then fair market value (as determined by the Board
of Directors, whose determination shall be conclusive and described in a Board
Resolution) of the portion of the assets, shares or evidences of indebtedness so
distributed applicable to one share of Common Stock and the denominator shall be
such current market price per share of the Common Stock, such adjustment to
become effective (subject to paragraph (l) of this Section 10.4) immediately
prior to the opening of business on the day following the date fixed for the
determination of stockholders entitled to receive such distribution.

          Under the provisions of the Company's Rights Agreement dated as of
November 11, 1996 between the Company and Harris Trust Company of California, as
amended as of November 20, 2002 between the Company, Harris Trust Company of
California and Computershare Investor Services LLC (the "Rights Plan"), upon
conversion of the Securities into Common Stock, to the extent that the Rights
Plan is still in effect upon such conversion, the Holders of Securities will
receive, in addition to the Common Stock, the rights described therein (whether
or not the rights have separated from the Common Stock at the tine of
conversion), subject to the limitations set forth in the Rights Plan. In
addition, if the Company implements a new rights plan ("New Rights Plan"), the
Company will provide under such New Rights Plan that the Holders of the
Securities will receive, in addition to the Common Stock, the rights under the
New Rights Plan (whether or not the rights under the New Rights Plan have
separated from the Common Stock at the time of conversion), subject to any
limitations set forth in the New Rights Plan.

               (e)  In case the Company shall, by dividend or otherwise,
distribute to all holders of its Common Stock cash (excluding cash portions of
distribution referred to in Section 10.4(d) and any cash that is distributed
upon a merger or consolidation to which Section 10.11 applies) in an aggregate
amount that, combined together with (1) the aggregate amount of any other cash
distributions to all holders of its Common Stock made exclusively in cash within
the 365-day period preceding the date of payment of such distribution and in
respect of which no adjustment pursuant to this paragraph (e) has been made and
(2) the aggregate of any cash plus the fair market value (as determined by the
Board of Directors, whose determination shall be conclusive and described in a
Board Resolution) of 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 365-day period preceding the date of payment of such distribution and
in respect of which no adjustment pursuant to paragraph (f) of this Section 10.4
has been made (the "combined cash and tender amount") exceeds 10% of the product
of the current market price per share (determined as provided in paragraph (h)
of this Section 10.4) of the Common Stock on the date for the determination of
holders of shares of Common Stock entitled to receive such distribution times
the number of shares of Common Stock outstanding on such date (the "aggregate
current market price"), then, and in each such case, immediately after the close
of business on such date for determination, subject to paragraph (l) of Section
10.4, the Conversion Rate shall be adjusted so that the same shall equal the
rate determined by dividing the Conversion Rate in effect immediately prior to
the close of business on the date fixed for determination of the stockholders
entitled to receive such distribution by a fraction (A) the numerator of which
shall be equal to the current market price per share (determined as provided in
paragraph (h) of this Section 10.4) of the Common Stock on the date fixed for
such determination

                                                                            -55-

<PAGE>

less an amount equal to the quotient of (i) the excess of such combined cash and
tender amount over 10% of such aggregate current market price divided by (ii)
the number of shares of Common Stock outstanding on such date fixed for
determination and (B) the denominator of which shall be equal to the current
market price per share (determined as provided in paragraph (h) of this Section
10.4) of the Common Stock on such date fixed for determination.

               (f)  In case a tender offer made by the Company or any Subsidiary
for all or any portion of the Common Stock shall be completed for an aggregate
consideration consisting of cash and/or property having a fair market value (as
determined by the Board of Directors, whose determination shall be conclusive
and described in a Board Resolution) that combined together with (1) the
aggregate of the cash plus the fair market value (as determined by the Board of
Directors, whose determination shall be conclusive and described in a Board
Resolution), of consideration payable in respect of any other tender offer by
the Company or any Subsidiary for all or any portion of the Common Stock
concluded within the 365-day period preceding the completion of such tender
offer and in respect of which no adjustment pursuant to this paragraph (f) has
been made and (2) the aggregate amount of any distributions to all holders of
the Company's Common Stock made exclusively in cash within the 365-day period
preceding the completion of such tender offer and in respect of which no
adjustment pursuant to paragraph (e) of this Section 10.4 has been made (the
"combined tender and cash amount") exceeds 10% of the product of the current
market price per share of the Common Stock (determined as provided in paragraph
(h) of this Section 10.4) as of the completion of such tender offer (the
"Completion Date") times the number of shares of Common Stock outstanding
(including any tendered shares) as of the Completion Date, then, and in each
such case, immediately prior to the opening of business on the day after the
date of the Completion Date, the Conversion Rate shall be adjusted so that the
same shall equal the rate determined by dividing the Conversion Rate immediately
prior to close of business on the Completion Date by a fraction (A) the
numerator of which shall be equal to (i) the product of (x) the current market
price per share of the Common Stock (determined as provided in paragraph (h) of
this Section 10.4) on the Completion Date multiplied by (y) the number of shares
of Common Stock outstanding (including any tendered shares) on the Completion
Date less (ii) the combined tender and cash amount, and (B) the denominator of
which shall be equal to the product of (x) the current market price per share of
the Common Stock (determined as provided in paragraph (h) of this Section 10.4)
as of the Completion Date multiplied by (y) the number of shares of Common Stock
outstanding (including any tendered shares) as of the Completion Date less the
number of all shares validly tendered and not withdrawn as of the Completion
Date (the shares deemed so accepted up to any such maximum, being referred to as
the "Purchased Shares").

               (g)  The reclassification of Common Stock into securities
including other than Common Stock (other than any reclassification upon a
consolidation or merger to which Section 10.11 applies) shall be deemed to
involve (1) a distribution of such securities other than Common Stock to all
holders of Common Stock (and the effective date of such reclassification shall
be deemed to be "the date fixed for the determination of stockholders entitled
to receive such distribution" and "the date fixed for such determination" within
the meaning of paragraph (d) of this Section 10.4), and (2) a subdivision or
combination, as the case may be, of the number of shares of Common Stock
outstanding immediately prior to such reclassification into the number of shares
of

                                                                            -56-

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Common Stock outstanding immediately thereafter (and the effective date of such
reclassification shall be deemed to be "the day upon which such subdivision
becomes effective" or "the day upon which such combination becomes effective",
as the case may be, and "the day upon which such subdivision or combination
becomes effective" within the meaning of paragraph (c) of this Section 10.4).

               (h)  For the purpose of any computation under paragraphs (b),
(d), (e) or (f) of this Section 10.4, the current market price per share of
Common Stock on any date shall be calculated by the Company and be deemed to be
the average of the daily Average Sales Prices Per Share for the five consecutive
Trading Days selected by the Company commencing not more than 10 Trading Days
before, and ending not later than, the earlier of the day in question and the
day before the "ex date" with respect to the issuance or distribution requiring
such computation. For purposes of this paragraph, the term "ex date," when used
with respect to any issuance or distribution, means the first date on which the
Common Stock trades regular way in the applicable securities market or on the
applicable securities exchange without the right to receive such issuance or
distribution.

               (i)  No adjustment in the Conversion Rate shall be required
unless such adjustment (plus any adjustments not previously made by reason of
this paragraph (i)) would require an increase or decrease of at least one
percent in such rate; provided, however, that any adjustments which by reason of
this paragraph (i) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment. All calculations under this
Article shall be made to the nearest cent or to the nearest one-hundredth of a
share, as the case may be.

               (j)  The Company may make such increases in the Conversion Rate,
for the remaining term of the Securities or any shorter term, in addition to
those required by paragraphs (a), (b), (c), (d), (e) and (f) of this Section
10.4, as it considers to be advisable in order to avoid or diminish any income
tax liability to any holders of shares of Common Stock resulting from any
dividend or distribution of Common Stock or issuance of rights or warrants to
purchase or subscribe for Common 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 increase the Conversion Rate by any amount for any period of time if
the period is at least twenty (20) days and the Board of Directors shall have
made a determination that such increase would be in the best interests of the
Company, which determination shall be conclusive; provided, however, that such
increase shall not be taken into account for purposes of determining whether the
Average Sales Price Per Share of the Common Stock exceeds the Conversion Price
by 105% in connection with an event which would otherwise be a Change in
Control. Whenever the Conversion Rate is increased pursuant to the preceding
sentence, the Company shall give notice of the increase to the Holders of
Securities in the manner provided in Section 1.6 at least fifteen (15) days
prior to the date the increased Conversion Rate takes effect, and such notice
shall state the increased Conversion Rate and the period during which it will be
in effect.

               (k)  Notwithstanding the foregoing provisions of this Section
10.4, no adjustment of the Conversion Rate shall be required to be made (1) upon
the issuance of shares of Common Stock pursuant to any present or future plan
for the reinvestment of dividends, (2) because of a

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tender or exchange offer of the character described in Rule 13e-4(h)(5) under
the Exchange Act or any successor rule thereto or (3) as a result of a rights
plan or poison pill implemented by the Company.

               (l)  In any case in which this Section 10.4 shall require that an
adjustment be made immediately following a record date, the Company may elect to
defer the effectiveness of such adjustment (but in no event until a date later
than the effective time of the event giving rise to such adjustment), in which
case the Company shall, with respect to any Security converted after such record
date and on and before such adjustment shall have become effective (1) defer
paying any cash payment pursuant to Section 10.3 hereof or issuing to the Holder
of such Security the number of shares of Common Stock issuable upon such
conversion in excess of the number of shares of Common Stock issuable thereupon
only on the basis of the Conversion Rate prior to adjustment, and (2) not later
than five Business Days after such adjustment shall have become effective, pay
to such Holder the appropriate cash payment pursuant to Section 10.3 hereof and
issue to such Holder the additional shares of Common Stock issuable on such
conversion. Notwithstanding the foregoing, no adjustment of the Conversion Rate
shall be made if the event giving rise to such adjustment does not occur.

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

          SECTION 10.5   Notice of Adjustments of Conversion Rate.

          Whenever the Conversion Rate is adjusted as herein provided:

               (a)  the Company shall compute the adjusted Conversion Rate in
accordance with Section 10.4 and shall prepare a certificate signed by the Chief
Financial Officer of the Company setting forth the adjusted Conversion Rate and
showing in reasonable detail the facts upon which such adjustment is based, and
such certificate shall promptly be filed with the Trustee and with the
Conversion Agent; and

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               (b)  upon each such adjustment, a notice stating that the
Conversion Rate has been adjusted and setting forth the adjusted Conversion Rate
shall be required, and as soon as practicable after it is required, such notice
shall be provided by the Company to all Holders in accordance with Section 1.6.

          Neither the Trustee nor the Conversion Agent shall be under any duty
or responsibility with respect to any such certificate or the information and
calculations contained therein, except to exhibit the same to any Holder of
Securities desiring inspection thereof at its office during normal business
hours. Unless and until a Responsible Officer of the Trustee and Conversion
Agent receive notice of an adjusted Conversion Rate, the Trustee and the
Conversion Agent may rely without inquiry on the Conversion Rate most recently
in effect.

          SECTION 10.6   Notice of Certain Corporate Action.

          In case:

               (a)  the Company shall declare a dividend (or any other
distribution) on its Common Stock payable (i) otherwise than exclusively in cash
or (ii) exclusively in cash in an amount that would require any adjustment
pursuant to Section 10.4; or

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

               (c)  of any reclassification of the Common Stock of the Company,
or of any consolidation, merger or share exchange to which the Company is a
party and for which approval of any stockholders of the Company is required, or
of the conveyance, sale, transfer or lease of all or substantially all of the
assets of the Company; or

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

then the Company shall cause to be filed at each office or agency maintained for
the purpose of conversion of Securities pursuant to Section 8.2, and shall cause
to be provided to all Holders in accordance with Section 1.6, at least 20 days
(or 10 days in any case specified in clause (a) or (b) above) prior to the
applicable record or effective date hereinafter specified, a notice stating (1)
the date on which a record is to be taken for the purpose of such dividend,
distribution, rights, options or warrants, or, if a record is not to be taken,
the date as of which the holders of Common Stock of record to be entitled to
such dividend, distribution, rights, options or warrants are to be determined or
(2) the date on which such reclassification, consolidation, merger, conveyance,
transfer, sale, lease, dissolution, liquidation or winding up is expected to
become effective, and the date as of which it is expected that holders of Common
Stock of record shall be entitled to exchange their shares of Common Stock for
securities, cash or other property deliverable upon such reclassification,
consolidation, merger, conveyance, transfer, sale, lease, dissolution,
liquidation or winding up. Neither the failure to give such notice or the notice
referred to in the following paragraph nor any

                                                                            -59-

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defect therein shall affect the legality or validity of the proceedings
described in clauses (a) through (d) of this Section 10.6. If at the time the
Trustee shall not be the Conversion Agent, a copy of such notice shall also
forthwith be filed by the Company with the Trustee.

          The Company shall cause to be filed at each office or agency
maintained for the purpose of conversion of Securities pursuant to Section 8.2,
and shall cause to be provided to all Holders in accordance with Section 1.6,
notice of any tender offer by the Company or any Subsidiary for all or any
portion of the Common Stock at or about the time that such notice of tender
offer is provided to the public generally.

          SECTION 10.7   Company to Reserve Common Stock.

          The Company shall at all times reserve and keep available, free from
preemptive rights, out of its authorized but unissued Common Stock, for the
purpose of effecting the conversion of Securities, the full number of shares of
Common Stock then issuable upon the conversion of all Outstanding Securities.

          SECTION 10.8   Taxes on Conversions.

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

          SECTION 10.9   Covenant as to Common Stock.

          The Company agrees that all shares of Common Stock that may be
delivered upon conversion of Securities, upon such delivery, will be newly
issued shares and will have been duly authorized and validly issued and will be
fully paid and nonassessable and, except as provided in Section 10.8, the
Company will pay all taxes, liens and charges with respect to the issue thereof.

          SECTION 10.10  Cancellation of Converted Securities.

          All Securities delivered for conversion shall be delivered to the
Trustee or its agent to be cancelled by or at the direction of the Trustee,
which shall dispose of the same as provided in Section 2.10.

          SECTION 10.11  Provision in Case of Consolidation, Merger or Sale of
Assets.

          In case of any consolidation or merger of the Company with or into any
other Person, any merger of another Person with or into the Company (other than
a merger that does not result in any

                                                                            -60-

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reclassification, conversion, exchange or cancellation of outstanding shares of
Common Stock of the Company) or any conveyance, sale, transfer or lease of all
or substantially all of the assets of the Company, the Person formed by such
consolidation or resulting from such merger or that acquires such assets, as the
case may be, shall execute and deliver to the Trustee a supplemental indenture
providing that the Holder of each Security then Outstanding shall have the right
thereafter, during the period such Security shall be convertible as specified in
Section 11.1, to convert such Security only into the kind and amount of
securities, cash and other property receivable upon such consolidation, merger,
conveyance, sale, transfer or lease by a holder of the number of shares of
Common Stock of the Company into which such Security might have been converted
immediately prior to such consolidation, merger, conveyance, sale, transfer or
lease, assuming such holder of Common Stock of the Company (a) is not a Person
with which the Company consolidated or merged with or into or that merged into
or with the Company or to which such conveyance, sale, transfer or lease was
made, as the case may be (a "Constituent Person"), or an Affiliate of a
Constituent Person and (b) failed to exercise his rights of election, if any, as
to the kind or amount of securities, cash and other property receivable upon
such consolidation, merger, conveyance, sale, transfer or lease (provided that
if the kind or amount of securities, cash and other property receivable upon
such consolidation, merger, conveyance, sale, transfer, or lease is not the same
for each share of Common Stock of the Company held immediately prior to such
consolidation, merger, conveyance, sale, transfer or lease by others than a
Constituent Person or an Affiliate thereof and in respect of which such rights
of election shall not have been exercised ("Non-electing Share"), then for the
purpose of this Section 10.11 the kind and amount of securities, cash and other
property receivable upon such consolidation, merger, conveyance, sale, transfer
or lease by the holders of each Non-electing Share shall be deemed to be the
kind and amount so receivable per share by a plurality of the Non-electing
Shares). Such supplemental indenture shall provide for adjustments that, for
events subsequent to the effective date of such supplemental indenture, shall be
as nearly equivalent as may be practicable to the adjustments provided for in
this Article. The above provisions of this Section 10.11 shall similarly apply
to successive consolidations, mergers, conveyances, sales, transfers or leases.
Notice of the execution of such a supplemental indenture shall be given by the
Company to the Holder of each Security as provided in Section 1.6 promptly upon
such execution.

          Neither the Trustee nor the Conversion Agent shall be under any
responsibility to determine the correctness of any provisions contained in any
such supplemental indenture relating either to the kind or amount of shares of
stock or other securities or property or cash receivable by Holders of
Securities upon the conversion of their Securities after any such consolidation,
merger, conveyance, transfer, sale or lease or to any such adjustment but may
accept as conclusive evidence of the correctness of any such provisions, and
shall be protected in relying upon, an Officers Certificate or an Opinion of
Counsel with respect thereto, which the Company shall cause to be furnished to
the Trustee upon request.

          SECTION 10.12  Responsibility of Trustee for Conversion Provisions.

          The Trustee, subject to the provisions of Section 5.1, and any
Conversion Agent shall not at any time be under any duty or responsibility to
any Holder of Securities to determine whether any facts exist that may require
any adjustment of the Conversion Rate, or with respect to the nature or

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extent of any such adjustment when made, or with respect to the method employed,
or herein or in any supplemental indenture provided to be employed, in making
the same, or whether a supplemental indenture need be entered into. Neither the
Trustee, subject to the provisions of Section 5.1, nor any Conversion Agent
shall be accountable with respect to the validity or value (or the kind or
amount) of any Common Stock, or of any other securities or property or cash,
that may at any time be issued or delivered upon the conversion of any Security;
and it or they do not make any representation with respect thereto. Neither the
Trustee, subject to the provisions of Section 5.1, nor any Conversion Agent
shall be responsible for any failure of the Company to make or calculate any
cash payment or to issue, transfer or deliver any shares of Common Stock or
share certificates or other securities or property or cash upon the surrender of
any Security for the purpose of conversion; and the Trustee, subject to the
provisions of Section 5.1, and any Conversion Agent shall not be responsible for
any failure of the Company to comply with any of the covenants of the Company
contained in this Article.

                                 ARTICLE ELEVEN

                           SUBORDINATION OF SECURITIES

          SECTION 11.1   Securities Subordinate to Senior Debt.

          The Company covenants and agrees, and each Holder of a Security by his
acceptance thereof likewise covenants and agrees, that to the extent and in the
manner hereinafter set forth in this Article (subject to the provisions of
Article Three) the indebtedness represented by the Securities and the payment of
the principal of (and premium, if any) and interest on, and any payment of the
Repurchase Price with respect to, each and all of the Securities are hereby
expressly made subordinate and subject in right of payment to the prior payment
in full in cash or Cash Equivalents of all Senior Debt.

          SECTION 11.2   No Payments in Certain Circumstances; Payment Over of
Proceeds Upon Dissolution, Etc.

          No payment on account of principal of, premium, if any, or interest
on, or redemption or repurchase of, the Securities shall be made if, at the time
of such payment: (a) a default in the payment of principal, premium, if any, or
interest or other amounts due on or in connection with any Senior Debt,
including any default under any redemption or repurchase obligation, occurs and
is continuing (or, in the case of Senior Debt for which there is a period of
grace, in the event of such a default that continues beyond the period of grace,
if any, specified in the instrument or lease evidencing such Senior Debt),
unless and until such default shall have been cured or waived or shall have
ceased to exist; or (b) a default, other than a payment default, on Designated
Senior Debt occurs and is continuing that then permits holders of such
Designated Senior Debt to accelerate its maturity and the Trustee receives a
notice of the default (a "Payment Blockage Notice") from the Company, a holder
of Designated Senior Debt or a Representative. Notwithstanding the foregoing,
the Company may make, and the Trustee may receive and shall apply, any payment
in respect of the Securities (for principal, premium, if any, or interest or
repurchase) if such payment was made prior to the occurrence of any of the
contingencies specified in clauses (a) and (b) above.

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          If the Trustee receives any Payment Blockage Notice pursuant to clause
(b) above, no subsequent Payment Blockage Notice shall be effective for purposes
of this Section 11.2 unless and until (1) at least 365 days shall have elapsed
since the effectiveness of the immediately prior Payment Blockage Notice and (2)
all scheduled payments of principal, premium, if any, and interest on the
Securities that have come due have been paid in full in cash. No nonpayment
default that existed or was continuing on the date of delivery of any Payment
Blockage Notice to the Trustee shall be, or be made, the basis for a subsequent
Payment Blockage Notice unless such existing nonpayment default has been cured
for a period of at least 90 days.

          The Company may and shall resume payments on and distributions in
respect of the Securities (including missed payments, if any) upon the earlier
of: (A) the date upon which the default is cured or waived, or (B) in the case
of a default referred to in clause (b) of the second preceding paragraph, 179
days after notice is received if the maturity of such Designated Senior Debt has
not been accelerated such that such debt is then presently payable, unless this
Indenture otherwise prohibits the payment or distribution at the time of such
payment or distribution.

          Upon (i) any acceleration of the principal amount due on the
Securities or (ii) any payment or distribution of assets of the Company of any
kind or character, whether in cash, property or securities, to creditors upon
any dissolution, winding up or total or partial liquidation or reorganization of
the Company, whether voluntary or involuntary, or in bankruptcy, insolvency,
receivership or other proceedings, all principal of, premium, if any, sinking
fund and interest or other amounts due, or to become due, upon or in connection
with all Senior Debt shall first be paid in full in cash or Cash Equivalents, or
payment thereof provided for in cash or Cash Equivalents in accordance with its
terms, before any payment is made on account of the principal of, premium, if
any, or interest on, or repurchase of, the indebtedness evidenced by the
Securities, and upon any such dissolution or winding up or liquidation or
reorganization any payment or distribution of assets of the Company of any kind
or character, whether in cash, property or securities, to which the Holders of
the Securities or the Trustee under this Indenture would be entitled, except for
the provisions hereof, shall be paid by the Company or by any receiver, trustee
in bankruptcy, liquidating trustee, agent or other Person making such payment or
distribution, or by the Holders of the Securities or by the Trustee under this
Indenture if received by them or it, as the case may be, directly to the holders
of Senior Debt (pro rata to each such holder on the basis of the respective
amounts of Senior Debt held by such holder) or their representatives, to the
extent necessary to pay all Senior Debt in full, in cash or Cash Equivalents,
after giving effect to any concurrent payment or distribution to or for the
holders of Senior Debt, before any payment or distribution is made to the
Holders of the Securities or to the Trustee under this Indenture.

          In the event that, contrary to the foregoing, any payment or
distribution of assets of the Company of any kind or character, whether in cash,
property or securities (other than junior securities, as defined in Section
11.11), shall be received by the Trustee or the Holders of the Securities before
all Senior Debt is paid in full in cash or Cash Equivalents or provision made
for such payment in accordance with its terms, such payment or distribution
shall be paid over or delivered to the holders of such Senior Debt or their
representative or representatives, or to the trustee or trustees under any
indenture pursuant to which any instruments evidencing any of such

                                                                            -63-

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Senior Debt have been issued, as their respective interests may appear, for
application to the payment of all Senior Debt remaining unpaid to the extent
necessary to pay all such Senior Debt in full in cash or Cash Equivalents in
accordance with its terms, after giving effect to any concurrent payment or
distribution to or for the holders of such Senior Debt.

          Subject to the payment in full in cash or Cash Equivalents of all
Senior Debt, the Holders of the Securities (together with the holders of any
other indebtedness of the Company that is subordinated in right of payment to
the payment in full of all Senior Debt that is not subordinated in right of
payment to the Securities and that by its terms grants such right of subrogation
to the holders thereof) shall be subrogated to the rights of the holders of
Senior Debt to receive payments or distribution of assets of the Company made on
the Senior Debt until the principal of, premium, if any, and interest on, or
amounts payable upon repurchase of, the Securities shall be paid in full; and,
for the purposes of such subrogation, no payments or distributions to the
holders of Senior Debt of any cash, property or securities to which the Holders
of the Securities or the Trustee would be entitled except for the provisions of
this Article, and no payment over pursuant to the provisions of this Article to
the holders of Senior Debt by the Holders of the Securities or the Trustee,
shall, as between the Company, its creditors other than the holders of Senior
Debt, and the Holders of Securities, be deemed to be a payment by the Company to
the holders of or on account of Senior Debt, 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 Debt, on the other hand.

          SECTION 11.3   Trustee to Effectuate Subordination.

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

          SECTION 11.4   No Waiver of Subordination Provisions.

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

          Without in any way limiting the generality of the foregoing paragraph,
the holders of Senior Debt may, at any time and from time to time, without the
consent of or notice to the Trustee or the Holders of the Securities, without
incurring responsibility to the Holders of the Securities and without impairing
or releasing the subordination provided in this Article or the obligations
hereunder of the Holders of the Securities to the holders of Senior Debt, do any
one or more of the following: (a) change the manner, place or terms of payment
or extend the time of payment of, or renew or alter, Senior Debt or otherwise
amend or supplement in any manner Senior Debt or any instrument evidencing the
same or any agreement under which Senior Debt is outstanding; (b) sell,
exchange,

                                                                            -64-

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release or otherwise deal with any property pledged, mortgaged or otherwise
securing Senior Debt; (c) release any Person liable in any manner for the
collection of Senior Debt; and (d) exercise or refrain from exercising any
rights against the Company and any other Person.

          SECTION 11.5   Notice to Trustee.

          The Company shall give prompt written notice to the Trustee of any
fact known to the Company that would prohibit the making of any payment to or by
the Trustee in respect of the Securities. Notwithstanding the provisions of this
Article or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts that would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until a Responsible Officer of the Trustee shall have received written
notice thereof from the Company or a holder of Senior Debt or from any trustee,
agent or representative therefor; and, prior to the receipt of any such written
notice, the Trustee, subject to the provisions of Section 5.1, shall be entitled
in all respects to assume that no such facts exist; provided, however, that if
the Trustee shall not have received the notice provided for in this Section 11.5
prior to the date upon which by the terms hereof any money may become payable
for any purpose (including without limitation the payment of the principal of
(and premium, if any) or interest on any Security), then, anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority to receive such money and to apply the same to the purpose for which
such money was received and shall not be affected by any notice to the contrary
that may be received by it within two Business Days prior to such date.

          Subject to the provisions of Section 5.1, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Debt (or a trustee, agent or
representative therefor) to establish that such notice has been given by a
holder of Senior Debt (or a trustee, agent or representative therefor). In the
event that the Trustee determines in good faith that further evidence is
required with respect to the right of any Person as a holder of Senior Debt to
participate in any payment or distribution pursuant to this Article Eleven, the
Trustee may request such Person to furnish evidence to the reasonable
satisfaction of the Trustee as to the amount of Senior Debt held by such Person,
the extent to which such Person is entitled to participate in such payment or
distribution and any other facts pertinent to the rights of such Person under
this Article Eleven, and if such evidence is not furnished, the Trustee may
defer any payment to such Person pending judicial determination as to the right
of such Person to receive such payment.

          SECTION 11.6   Reliance on Judicial Order or Certificate of
Liquidating Agent.

          Upon any payment or distribution of assets of the Company referred to
in this Article, the Trustee, subject to the provisions of Section 5.1, and the
Holders of the Securities shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such insolvency,
bankruptcy, receivership, liquidation, reorganization, dissolution, winding up
or similar case or proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit
of creditors, agent or other Person making such payment or distribution,
delivered to the Trustee or to the Holders of Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the

                                                                            -65-

<PAGE>

Senior Debt and other indebtedness of the Company, the amount thereof or payable
thereon, the amount or amounts paid or distributed thereon and all other facts
pertinent thereto or to this Article.

          SECTION 11.7   Trustee Not Fiduciary for Holders of Senior Debt.

          The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Debt and shall not be liable to any such holders if it shall
in good faith mistakenly pay over or distribute to Holders of Securities or to
the Company or to any other Person cash, property or securities to which any
holders of Senior Debt shall be entitled by virtue of this Article or otherwise.
With respect to the holders of Senior Debt, the Trustee undertakes to perform or
to observe only such of its covenants or obligations as are specifically set
forth in this Article Eleven, and no implied covenants or obligations with
respect to holders of Senior Debt shall be read into this Indenture against the
Trustee.

          SECTION 11.8   Reliance by Holders of Senior Debt on Subordination
Provisions.

          Each Holder by accepting a Security acknowledges and agrees that the
foregoing subordination provisions are, and are intended to be, an inducement
and a consideration to each holder of any Senior Debt, whether such Senior Debt
was created or acquired before or after the issuance of the Securities, to
acquire and continue to hold, or to continue to hold, such Senior Debt, and such
holder of Senior Debt shall be deemed conclusively to have relied on such
subordination provisions in acquiring and continuing to hold, or in continuing
to hold, such Senior Debt. Such holders of the Company's Senior Debt are
intended by the parties to the Indenture to be third party creditor
beneficiaries under this Indenture for the purposes of enforcing the provisions
of this Article Eleven.

          SECTION 11.9   Rights of Trustee as Holder of Senior Debt;
Preservation of Trustee's Rights.

          The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article Eleven with respect to any Senior Debt that may
at any time be held by it, to the same extent as any other holder of Senior
Debt, and nothing in this Indenture shall deprive the Trustee of any of its
rights as such holder.

          Nothing in this Article Eleven shall apply to claims of, or payments
to, the Trustee under or pursuant to Section 5.7.

          SECTION 11.10  Article Applicable to Paying Agents.

          In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting hereunder, the term "Trustee"
as used in this Article shall in such case (unless the context otherwise
requires) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if such Paying Agent were
named in this Article Eleven in addition to or in place of the Trustee;
provided, however, that Section 11.9

                                                                            -66-

<PAGE>

shall not apply to the Company or any Affiliate of the Company if it or such
Affiliate acts as Paying Agent.

          SECTION 11.11  Certain Conversions and Repurchases Deemed Payment.

          For the purposes of this Article Eleven only, (a) the issuance and
delivery of junior securities upon conversion of Securities in accordance with
Article Ten or upon the repurchase of Securities in accordance with Article
Twelve shall not be deemed to constitute a payment or distribution on account of
the principal of or premium or interest on Securities or on account of the
purchase or other acquisition of Securities, and (b) the payment, issuance or
delivery of cash, property or securities (other than junior securities) upon
conversion of a Security shall be deemed to constitute payment on account of the
principal of such Security. For the purposes of this Section 11.11, the term
"junior securities" means (1) shares of any stock of any class of the Company
and any cash, property or securities into which the Securities are convertible
pursuant to Article Ten and (2) securities of the Company that are subordinated
in right of payment to all Senior Debt that may be outstanding at the time of
issuance or delivery of such securities to substantially the same extent as, or
to a greater extent than, the Securities are so subordinated as provided in this
Article Eleven. Nothing contained in this Article Eleven 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 Debt and the Holders of the
Securities, the right, which is absolute and unconditional, of the Holder of any
Security to convert such Security in accordance with Article Ten or to exchange
such Security for Common Stock in accordance with Article Twelve if the Company
elects to satisfy the obligations under Article Twelve by the delivery of Common
Stock.

                                 ARTICLE TWELVE

                    REPURCHASE OF SECURITIES AT THE OPTION OF
                       THE HOLDER UPON A CHANGE IN CONTROL

          SECTION 12.1   Right to Require Repurchase.

          In the event that a Change in Control shall occur, then each Holder
shall have the right, at the Holder's option, but subject to the provisions of
Section 12.2, to require the Company to repurchase, and upon the exercise of
such right the Company shall repurchase, all of such Holder's Securities not
theretofore called for redemption, or any portion of the principal amount
thereof that is equal to U.S.$1,000 or any greater integral multiple of
U.S.$1,000, on the date (the "Repurchase Date") that is fixed by the Company at
a cash purchase price equal to 100% of the principal amount of the Securities to
be repurchased plus interest accrued to the Repurchase Date (the "Repurchase
Price"); provided, however, that installments of interest on Securities whose
Stated Maturity is on or prior to the Repurchase Date shall be payable to the
Holders of such Securities, or one or more Predecessor Securities, registered as
such on the relevant Record Date according to their terms and the provisions of
Section 2.8. The Repurchase Date will be determined by the Company in the
following manner: (i) the Company will give notice of the Change in Control as
contemplated in Section 12.3(a); (ii) each Holder electing to exercise the
repurchase right must deliver, on or before the thirtieth (30th) day (or such
greater period as may be required by applicable law) after the date of the

                                                                            -67-

<PAGE>

Company's notice provided in provision (i) above: (A) irrevocable written notice
to the trustee of such Holder's exercise of its repurchase right, and (B) the
Securities with respect to which such repurchase right is being exercised; and
(iii) the Company will make the repurchase on a date that is no later than 45
days after the Holder has delivered the notice provided in proviso (ii) above.
Such right to require the repurchase of the Securities shall not continue after
a discharge of the Company from its obligations with respect to the Securities
in accordance with Article Three unless a Change in Control shall have occurred
prior to such discharge. At the option of the Company, the Repurchase Price may
be paid in cash or, subject to the fulfillment by the Company of the conditions
set forth Section 12.2, by delivery of shares of Common Stock or in a
combination of cash and Common Stock having a fair market value equal to the
Repurchase Price. Whenever in this Indenture (including Sections 2.2, 4.1(a) and
4.8) there is a reference, in any context, to the principal of any Security as
of any time, such reference shall be deemed to include reference to the
Repurchase Price that has become and remains payable in respect of such Security
to the extent that such Repurchase Price is, was or would be so payable at such
time, and express mention of the Repurchase Price in any provision of this
Indenture shall not be construed as excluding the Repurchase Price in those
provisions of this Indenture when such express mention is not made; provided,
however, that for the purposes of Article Eleven such reference shall be deemed
to include reference to the Repurchase Price only to the extent the Repurchase
Price is payable in cash.

          For purposes of this Section 12.1, the fair market value of shares of
Common Stock shall be determined by the Company and shall be equal to 95% of the
average of the closing price per share of the Common Stock or the principal
exchange on which the Common Stock is traded in on The Nasdaq National Market
for each of the five consecutive Trading Days immediately preceding and
including the third Trading Day prior to the Repurchase Date.

          SECTION 12.2   Conditions to the Company's Election to Pay the
Repurchase Price in Common Stock.

          The Company may elect to pay the Repurchase Price by delivery of
shares of Common Stock pursuant to Section 12.1 if and only if the following
conditions shall have been satisfied:

               (a)  As to each Holder, the Repurchase Price shall be paid only
in cash in the event any shares of Common Stock to be issued to such Holder upon
repurchase of Securities hereunder (1) require registration under any federal
securities law before such shares may be freely transferable without being
subject to any transfer restrictions under the Securities Act upon repurchase
and if such registration is not completed or does not become effective prior to
the Repurchase Date or (2) require registration with or approval of any
governmental authority under any state law or any other federal law before such
shares may be validly issued or delivered upon repurchase and if such
registration is not completed or does not become effective or such approval is
not obtained prior to the Repurchase Date;

               (b)  Payment of the Repurchase Price may not be made in Common
Stock unless such stock is, or shall have been, approved for quotation on The
Nasdaq National Market or listed or quoted on a national securities exchange or
other quotation system, in either case, prior to the Repurchase Date; and

                                                                            -68-

<PAGE>

               (c)  All shares of Common Stock that may be issued upon
repurchase of Securities will be issued out of the Company's authorized but
unissued Common Stock will and, upon issue, be duly and validly issued and fully
paid and non-assessable and free of any preemptive rights.

          If all of the conditions set forth in this Section 12.2 are not
satisfied in accordance with the terms thereof, the Repurchase Price shall be
paid by the Company only in cash.

          SECTION 12.3   Notices; Method of Exercising Repurchase Right, Etc.

               (a)  Unless the Company shall have theretofore called for
redemption all of the Outstanding Securities, on or before the thirtieth day
after the occurrence of a Change in Control, the Company or, at the request and
expense of the Company on or before the thirtieth day after such occurrence, the
Trustee, shall give to all Holders of Securities, in the manner provided in
Section 1.6, notice (the "Company Notice") 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 notice of a repurchase
right to the Trustee.

          Each notice of a repurchase right shall state:

                    (1)    the Repurchase Date,

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

                    (3)    the Repurchase Price, and whether the Repurchase
Price shall be paid by the Company in cash or by delivery of shares of Common
Stock,

                    (4)    a description of the procedure that a Holder must
follow to exercise a repurchase right, and the place or places where such
Securities are to be surrendered for payment of the Repurchase Price and accrued
interest, if any,

                    (5)    that on the Repurchase Date, the Repurchase Price,
and accrued interest, if any, will become due and payable upon each such
Security designated by the Holder to be repurchased and that interest thereon
shall cease to accrue on and after said date,

                    (6)    the Conversion Rate 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 such Securities may be surrendered
for conversion,

                    (7)    the place or places that the Notice of Election of
Holder to Require Repurchase attached hereto as Exhibit B, shall be delivered,
and the form of such notice, and

                    (8)    the CUSIP number or numbers of such 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.

                                                                            -69-

<PAGE>

          If any of the foregoing provisions or other provisions of this Article
Twelve are inconsistent with applicable law, such law shall govern.

               (b)  To exercise a repurchase right, a Holder shall deliver to
the Trustee on or before the thirtieth day (or such greater period as may be
required by applicable law) after the date of the Company Notice (1) written
notice of the Holder's exercise of such right, which notice shall set forth the
name of the Holder, the principal amount of the Securities to be repurchased
(and, if any Security is to repurchased in part, the serial number thereof, the
portion of the principal amount thereof to be repurchased and the name of the
Person in which the portion thereof to remain Outstanding after such repurchase
is to be registered) and 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 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
(2) the Securities with respect to which the repurchase right is being
exercised. Such written notice shall be irrevocable, except that the right of
the Holder to convert the Securities with respect to which the repurchase right
is being exercised shall continue until the close of business on the Business
Day immediately preceding the Repurchase Date.

               (c)  In the event a repurchase right shall be exercised in
accordance with the terms hereof, the Company shall pay or cause to be paid to
the Trustee the Repurchase Price in cash or shares of Common Stock, as provided
above, for payment to the Holder on the Repurchase Date or, if shares of Common
Stock are to be paid, as promptly after the Repurchase Date as practicable,
together with accrued and unpaid interest to the Repurchase Date payable with
respect to the Securities as to which the purchase right has been exercised;
provided, however, that installments of interest that mature on or prior to the
Repurchase Date shall be payable in cash to the Holders of such Securities, or
one or more Predecessor Securities, registered as such at the close of business
on the relevant Regular Record Date.

               (d)  If any Security (or portion thereof) surrendered for
repurchase shall not be so paid on the Repurchase Date, the principal amount of
such Security (or portion thereof, as the case may be) shall, until paid, bear
interest to the extent permitted by applicable law from the Repurchase Date at
the rate then in effect per annum, and each Security shall remain convertible
into Common Stock until the principal of such Security (or portion thereof, as
the case may be) 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 (with, if the Company or the Trustee so requires, due
endorsement by, or a written instrument of transfer in form satisfactory to the
Company and the Trustee duly executed by, the Holder thereof or his attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and make available for delivery to the Holder of such
Security without service charge, a new Security or Securities, containing
identical terms and conditions, each in an authorized denomination in aggregate
principal amount equal to and in exchange for the unrepurchased portion of the
principal of the Security so surrendered.

                                                                            -70-

<PAGE>

               (f)  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.

               (g)  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 that 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 that would otherwise be 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 12.3, the
current market price of a share of Common Stock is the average of the high and
low sales price per Share of the Common Stock on the Trading Day immediately
preceding the Repurchase Date.

               (h)  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 that may be payable in respect of (1) income of
the Holder or (2) any transfer involved in the issuance or delivery of
certificates for shares of Common Stock in a name other than that of the Holder
of the 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.

               (i)  All Securities delivered for repurchase shall be delivered
to the Trustee to be canceled at the direction of the Trustee, which shall
dispose of the same as provided in Section 2.10.

                                ARTICLE THIRTEEN

                      HOLDERS LISTS AND REPORTS BY TRUSTEE
                            AND COMPANY; NON-RECOURSE

          SECTION 13.1   Company to Furnish Trustee Names and Addresses of
Holders.

                                                                            -71-

<PAGE>

          The Company will furnish or cause to be furnished to the Trustee:

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

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

provided, however, that no such list need be furnished so long as the Trustee is
acting as Security Registrar.

          SECTION 13.2   Preservation of Information.

               (a)  The Trustee shall preserve, in as current a form as is
reasonably practicable, the names and addresses of Holders contained in the most
recent list furnished to the Trustee as provided in Section 13.1 and the names
and addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 13.1 upon receipt of a new list so furnished.

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

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

          SECTION 13.3   No Recourse Against Others.

          An incorporator or any past, present or future director, officer,
employee or stockholder, as such, of the Company shall not have any liability
for any obligations of the Company under the Securities or this Indenture or for
any claim based on, in respect of or by reason of such obligations or their
creation. By accepting a Security, each Holder shall waive and release all such
liability. Such waiver and release shall be part of the consideration for the
issue of the Securities.

          SECTION 13.4   Reports by Trustee.

               (a)  After this Indenture has been qualified under the Trust
Indenture Act, the Trustee shall transmit to Holders such reports concerning the
Trustee and its actions under this Indenture as may be required pursuant to the
Trust Indenture Act at the times and in the manner provided therein. If required
by Section 313(a) of the Trust Indenture Act, the Trustee shall, within

                                                                            -72-

<PAGE>

60 days after each May 15 following the date of this Indenture, deliver to
Holders a brief report, dated as of such May 15, that complies with the
provisions of such Section 313(a).

               (b)  After this Indenture has been qualified under the Trust
Indenture Act, a copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which the Securities are listed, with the Commission and with the Company. The
Company will promptly notify the Trustee when the Securities are listed on any
stock exchange.

          SECTION 13.5   Reports by Company.

          After this Indenture has been qualified under the Trust Indenture Act,
the Company shall file with the Trustee and the Commission, and transmit to
Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times and
in the manner provided therein; provided, however, that any such information,
documents or reports required to be filed with the Commission pursuant to
Section 13 or 15(d) of the Exchange Act shall be filed with the Trustee within
15 days after the same is so required to be filed with the Commission.

          Delivery of such reports, information and documents to the Trustee is
for informational purposes only and the Trustee's receipt thereof 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).

                                                                            -73-

<PAGE>

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

                                 CELL THERAPEUTICS, INC.

                                 By  /s/ James A. Bianco
                                     ----------------------------------------
                                 Name: James A. Bianco, M.D.
                                 Title: President and Chief Executive Officer

                                 STATE STREET BANK AND TRUST COMPANY OF
                                 CALIFORNIA, N.A., a national banking
                                 association, as Trustee

                                 By  /s/ Scott C. Emmons
                                     ----------------------------------------
                                 Name: Scott C. Emmons
                                 Title: Vice President

                                                                            -74-

<PAGE>

                                    EXHIBIT A

                                 [FORM OF FACE]

          [THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH GLOBAL
SECURITY:

          THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A
NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED BY THE COMPANY, THE TRUSTEE AND
ANY AGENT THEREOF AS OWNER AND HOLDER OF THIS SECURITY FOR ALL PURPOSES.]

          [THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH GLOBAL SECURITY
FOR WHICH THE DEPOSITORY TRUST COMPANY IS TO BE THE DEPOSITARY:

          UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUER
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.]

                                                                             A-1

<PAGE>

                             CELL THERAPEUTICS, INC.

          5.75% CONVERTIBLE SENIOR SUBORDINATED NOTE DUE JUNE 15, 2008

No. ____________                                             U.S.$____________

CUSIP No. ___________

          Cell Therapeutics, Inc., a corporation duly organized and existing
under the laws of the State of Washington (herein called the "Company," which
term includes any successor Person under the Indenture referred to on the
reverse hereof), for value received, hereby promises to pay to Cede & Co., or
registered assigns, the principal sum of _____________ United States Dollars
(U.S.$ __________) [if this Security is a Global Security, then insert (which
principal amount may from time to time be increased or decreased to such other
principal amounts (which, taken together with the principal amounts of all other
Outstanding Securities, shall not exceed $102,900,000 in the aggregate at any
time) by adjustments made on the records of the Trustee hereinafter referred to
in accordance with the Indenture)] on June 15, 2008, unless redeemed or
repurchased on an earlier date, and to pay interest thereon, from December 20,
2002, or from the most recent Interest Payment Date (as defined below) to which
interest has been paid or duly provided for, semiannually in arrears on June 15
and December 15 in each year (each, an "Interest Payment Date"), commencing June
15, 2003, at the rate of 5.75% per annum, until the principal hereof is due, and
at the rate then in effect on any overdue principal and premium, if any, and, to
the extent permitted by law, on any overdue interest. The interest so payable,
and punctually paid or duly provided for, on any Interest Payment Date will, as
provided in the Indenture, be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on
the Regular Record Date for such interest, which shall be the June 1 and
December 1 (whether or not a Business Day), as the case may be, next preceding
such Interest Payment Date. Except as otherwise provided in the Indenture, any
such interest not so punctually paid or duly provided for will forthwith cease
to be payable to the Holder on such Regular Record Date and may either be paid
to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on a Special Record Date for
the payment of such Defaulted Interest to be fixed by the Company, notice
whereof shall be given to Holders of Registered Securities not less than ten
days prior to such Special Record Date, or be paid at any time in any other
lawful manner not inconsistent with the requirements of any securities exchange
on which the Securities may be listed, and upon such notice as may be required
by such exchange, all as more fully provided in the Indenture. Payments of
principal shall be made upon the surrender of this Security at the option of the
Holder at the Corporate Trust Office or at such other office or agency of the
Company as may be designated by it for such purpose in the Borough of Manhattan,
The City of New York, in such coin or currency of the United States of America
as at the time of payment shall be legal tender for the payment of public and
private debts, or at such other offices or agencies as the Company may
designate, by United States Dollar check drawn on, or wire transfer to, a United
States Dollar account (such a wire transfer to be made only to a Holder of an
aggregate principal amount of Registered Securities in excess of U.S.$2,000,000
and only if such Holder shall have furnished wire instructions in writing to the
Trustee no later than 15 days prior to the relevant payment date) maintained by
the payee. Payment of interest on this

                                                                             A-2

<PAGE>

Security may be made by United States Dollar check mailed to the address of the
Person entitled thereto as such address shall appear in the Security Register
or, upon written application by the Holder to the Security Registrar setting
forth wire instructions not later than the relevant Record Date, by wire
transfer to a United States dollar account (such a wire transfer to be made only
to a Holder of an aggregate principal amount of Registered Securities in excess
of U.S.$2,000,000 and only if such Holder shall have furnished wire instructions
in writing to the Trustee no later than 15 days prior to the relevant payment
date) maintained by the payee.

          Except as specifically provided herein and in the Indenture, the
Company shall not be required to make any payment with respect to any tax,
assessment or other governmental charge imposed by any government or any
political subdivision or taxing authority thereof or therein.

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

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

                                                                             A-3

<PAGE>

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

                                      CELL THERAPEUTICS, INC.

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

Attest:

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

Dated:
       --------------------------

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

STATE STREET BANK AND TRUST COMPANY OF CALIFORNIA, N.A.,
as Trustee

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

                                                                             A-4

<PAGE>

                                [FORM OF REVERSE]

          This Security is one of a duly authorized issue of securities of the
Company designated as its "5.75% Convertible Senior Subordinated Notes due June
15, 2008" (herein called the "Securities"), limited in aggregate principal
amount to U.S.$102,900,000, issued and to be issued under an Indenture, dated as
of December 20, 2002 (herein called the "Indenture"), between the Company and
State Street Bank and Trust Company of California, N.A., a national banking
association, as Trustee (herein called the "Trustee," which term includes any
successor trustee under the Indenture), to which Indenture and all indentures
supplemental thereto reference is hereby made for a statement of the respective
rights, limitations of rights, duties and immunities thereunder of the Company,
the Trustee, the holders of Senior Debt and the Holders of the Securities and of
the terms upon which the Securities are, and are to be, authenticated and
delivered. As provided in the Indenture and subject to certain limitations set
forth therein, Registered Securities are exchangeable for a like aggregate
principal amount of Registered Securities of any authorized denominations as
requested by the Holder surrendering the same upon surrender of the Registered
Security or Registered Securities to be exchanged at the Corporate Trust Office.
The Trustee upon such surrender by the Holder will issue the new Registered
Securities in the requested denominations.

          No sinking fund is provided for the Securities.

          The Securities are subject to redemption at the option of the Company
at any time on or after June 21, 2004, in whole or in part, upon not less than
30 nor more than 60 days' notice to the Holders prior to the Redemption Date at
the following Redemption Prices (expressed as percentages of the principal
amount) for the twelve-month period beginning on June 15 of the following years
(June 21 through June 14 in the case of the first of such periods):

YEAR                                                           REDEMPTION PRICE
------------------------------------------------------------   ----------------
2004........................................................       103.286%
2005........................................................       102.464%
2006........................................................       101.643%
2007........................................................       100.821%

and thereafter at a Redemption Price equal to 100% of the principal amount,
together, in each case, with accrued interest to, but excluding the Redemption
Date; provided, however, that interest installments on Securities whose Stated
Maturity is on or prior to such Redemption Date will be payable to the Holders
of such Securities, or one or more Predecessor Securities, of record at the
close of business on the relevant Record Dates referred to on the face hereof,
all as provided in the Indenture.

          The Securities are subject to redemption at the option of the Company
at any time before June 21, 2004 ("Provisional Redemption"), in whole or in
part, upon not less than 30 nor more than 60 days' notice to the Holders prior
to the Redemption Date at a Redemption Price equal to 100% of the principal
amount, together, in each case, with accrued interest to, but excluding, the
Redemption

                                                                             A-5

<PAGE>

Date, if the closing price of the Company's Common Stock has exceeded 150% of
the Conversion Price then in effect for at least 20 trading days within a period
of 30 consecutive trading days ending on the trading day before the date of
mailing of the notice of the Provisional Redemption. Upon any Provisional
Redemption, the Company will pay to the Holders cash or Common Stock, or in a
combination of cash and Common Stock, with respect to the Securities called for
Provisional Redemption, and previously converted after the notice of Provisional
Redemption and before to the date of the Provisional Redemption, in an amount
equal to $86.25 per $1,000 principal amount of the Securities, less the amount
of any interest paid on the Securities before the date of the Provisional
Redemption. For purposes of any such payment in Common Stock, the value of such
Common Stock will be based upon the highest closing price of shares of the
Common Stock for the 20 trading days referred to above.

          In the event of a redemption of the Securities, the Company will not
be required (a) to register the transfer or exchange of Registered Securities
for a period of 15 days immediately preceding the date notice is given
identifying the serial numbers of the Securities called for such redemption (it
being understood that the Company will not be required to identify the serial
numbers of Outstanding Securities if all such Securities are called for
redemption) or (b) to register the transfer or exchange of any Registered
Security, or portion thereof, called for redemption.

          Notice to the Holders will be given not less than 30 nor more than 60
days prior to the Redemption Date as provided in the Indenture.

          In any case where the due date for the payment of the principal of,
premium, if any, or interest on any Security or the last day on which a Holder
of a Security has a right to convert his Security shall be, at any Place of
Payment or Place of Conversion, as the case may be, a day on which banking
institutions at such Place of Payment or Place of Conversion are authorized or
obligated by law or executive order to close, then payment of principal,
premium, if any, or interest or delivery for conversion of such Security need
not be made on or by such date at such place but may be made on or by the next
succeeding day at such place which is not a day on which banking institutions
are authorized or obligated by law or executive order to close, with the same
force and effect as if made on the date for such payment or the date fixed for
redemption or repurchase, or by such last day for conversion, and no interest
shall accrue on the amount so payable for the period from and after such due
date.

          Subject to and upon compliance with the provisions of the Indenture,
the Holder of this Security is entitled, at his option, at any time following
the original issue date of the Securities and on or before the close of business
on June 15, 2008, or in case this Security or a portion hereof is called for
redemption or the Holder hereof has exercised his right to require the Company
to repurchase this Security or such portion hereof, then in respect of this
Security until and including, but (unless the Company defaults in making the
payment due upon redemption or repurchase, as the case may be) not after, the
close of business on the Business Day immediately preceding the Redemption Date
or the Repurchase Date, as the case may be, to convert this Security or any
portion of the principal amount hereof that is an integral multiple of
U.S.$1,000 (provided that the unconverted portion of such principal amount is
U.S.$1,000 or any integral multiple of U.S.$1,000

                                                                             A-6

<PAGE>

in excess thereof) into fully paid and nonassessable shares of Common Stock of
the Company at an initial Conversion Rate of 100.0 (or at the current adjusted
Conversion Rate if an adjustment has been made as provided in the Indenture) by
surrender of this Security, duly endorsed or assigned to the Company or in blank
and, in case such surrender shall be made during the period from the close of
business on any Regular Record Date next preceding any Interest Payment Date to
the opening of business on such Interest Payment Date (except if this Security
has been called for redemption on a Redemption Date or is repurchasable on a
Repurchase Date, with the consequence that the conversion right of such Security
would terminate between such Regular Record Date and the close of business on
such Interest Payment Date), also accompanied by payment in New York Clearing
House or other funds acceptable to the Company of an amount equal to the
interest payable on such Interest Payment Date on the principal amount of this
Security then being converted, and also the conversion notice hereon duly
executed, to the Company at the Corporate Trust Office, or at such other office
or agency of the Company, subject to any laws or regulations applicable thereto
and subject to the right of the Company to terminate the appointment of any
Conversion Agent (as defined below) as may be designated by it for such purpose
in the Borough of Manhattan, The City of New York, or at such other offices or
agencies as the Company may designate (each a "Conversion Agent"), provided,
further, that in case surrender of this Security for conversion shall be made
during the period from the close of business on any Regular Record Date next
preceding any Interest Payment Date to the opening of business on such Interest
Payment Date and if this Security or portion hereof has been called for
redemption on a Redemption Date or is repurchasable on a Repurchase Date, with
the consequence that the conversion right of such Security would terminate
between such Regular Record Date and the close of business on such Interest
Payment Date, then the Holder of this Security will be entitled to receive the
interest accruing hereon from the Interest Payment Date next preceding the date
of such conversion to such succeeding Interest Payment Date and shall not be
required to pay such interest upon surrender of this Security for conversion.
Subject to the provisions of the preceding sentence and, in the case of a
conversion after the close of business on the Regular Record Date next preceding
any Interest Payment Date and on or before the close of business on such
Interest Payment Date, to the right of the Holder of this Security (or any
Predecessor Security of record as of such Regular Record Date) to receive the
related installment of interest to the extent and under the circumstances
provided in the Indenture, no cash payment or adjustment is to be made on
conversion for interest accrued hereon from the Interest Payment Date next
preceding the day of conversion, or for dividends on the Common Stock issued on
conversion hereof. The Company shall thereafter deliver to the Holder the fixed
number of shares of Common Stock (together with any cash adjustment or rights or
warrants, as provided in the Indenture) into which this Security is convertible
and such delivery will be deemed to satisfy the Company's obligation to pay the
principal amount of this Security. No fractions of shares or scrip representing
fractions of shares will be issued on conversion, but instead of any fractional
interest (calculated to the nearest 1/100th of a share) the Company shall pay a
cash adjustment as provided in the Indenture. The Conversion Rate is subject to
adjustment as provided in the Indenture. In addition, the Indenture provides
that in case of certain consolidations or mergers to which the Company is a
party or the conveyance, transfer, sale or lease of all or substantially all of
the property and assets of the Company, the Indenture shall be amended, without
the consent of any Holders of Securities, so that this Security, if then
Outstanding, will be convertible thereafter, during the period this Security
shall be convertible as specified above, only into the kind and amount of
securities,

                                                                             A-7

<PAGE>

cash and other property receivable upon such consolidation, merger, conveyance,
transfer, sale or lease by a holder of the number of shares of Common Stock of
the Company into which this Security could have been converted immediately prior
to such consolidation, merger, conveyance, transfer, sale or lease (assuming
such holder of Common Stock is not a Constituent Person, failed to exercise any
rights of election and received per share the kind and amount received per share
by a plurality of Non-electing Shares). No adjustment in the Conversion Rate
will be made until such adjustment would require an increase or decrease of at
least one percent of such rate, provided that any adjustment that would
otherwise be made will be carried forward and taken into account in the
computation of any subsequent adjustment.

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

          If a Change in Control occurs, the Holder of this Security, at the
Holder's option, shall have the right, in accordance with the provisions of the
Indenture, to require the Company to repurchase this Security (or any portion of
the principal amount hereof that is equal to U.S.$1,000 or any greater integral
multiple of U.S.$1,000) for cash at a Repurchase Price equal to 100% of the
principal amount thereof plus interest accrued to, but excluding, the Repurchase
Date. At the option of the Company, the Repurchase Price may be paid in cash or,
subject to the conditions provided in the Indenture, by delivery of shares of
Common Stock or in a combination of cash and Common Stock, having a fair market
value equal to the Repurchase Price. For purposes of this paragraph, the fair
market value of shares of Common Stock shall be determined by the Company and
shall be equal to 95% of the average of the closing price per share for the five
consecutive Trading Days immediately preceding and including the third Trading
Day prior to the Repurchase Date. Whenever in this Security there is a
reference, in any context, to the principal of any Security as of any time, such
reference shall be deemed to include reference to the Repurchase Price payable
in respect of such Security to the extent that such Repurchase Price is, was or
would be so payable at such time, and express mention of the Repurchase Price in
any provision of this Security shall not be construed as excluding the
Repurchase Price so payable in those provisions of this Security when such
express mention is not made; provided, however, that, for the purposes of the
paragraph below concerning the consequences of an Event of Default, such
reference shall be deemed to include reference to the Repurchase Price only to
the extent the Repurchase Price is payable in cash.

          [The following paragraph shall appear in each Registered Security that
is not a Global Security:

                                                                             A-8

<PAGE>

          In the event of redemption, repurchase or conversion of this Security
in part only, a new Registered Security or Registered Securities for the
unredeemed, unrepurchased or unconverted portion hereof will be issued in the
name of the Holder hereof.]

          [The following paragraph shall appear in each Global Security:

          In the event of a deposit or withdrawal of an interest in this
Security, including an exchange, transfer, redemption, repurchase or conversion
of this Security in part only, the Trustee, as custodian of the Depositary,
shall make an adjustment on its records to reflect such deposit or withdrawal in
accordance with the Applicable Procedures.]

          The indebtedness evidenced by this Security is, to the extent and in
the manner provided in the Indenture, subordinate and subject in right of
payment to the prior payment in full in cash or Cash Equivalents of all Senior
Debt of the Company, and this Security is issued subject to such provisions of
the Indenture with respect thereto. Each Holder of this Security, by accepting
the same,

          (a)  agrees to and shall be bound by such provisions,

          (b)  authorizes and directs the Trustee on his behalf to take such
action as may be necessary or appropriate to effectuate the subordination so
provided and

          (c)  appoints the Trustee his attorney-in-fact for any and all such
purposes.

          If an Event of Default shall occur and be continuing, the principal of
all the Securities, together with accrued interest to the date of declaration,
may be declared due and payable in the manner and with the effect provided in
the Indenture. Upon payment (i) of the amount of principal so declared due and
payable, together with accrued interest to the date of declaration, and (ii) of
interest on any overdue principal and, to the extent permitted by applicable
law, overdue interest, all of the Company's obligations in respect of the
payment of the principal of and interest on the Securities shall terminate.

          The Indenture permits, with certain exceptions as therein provided,
the amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with the written consent of the Holders
of a majority in principal amount of the Securities at the time Outstanding. The
Indenture also contains provisions permitting the Holders of specified
percentages in principal amount of the Securities at the time Outstanding, on
behalf of the Holders of all the Securities, to waive compliance by the Company
with certain provisions of the Indenture and certain past defaults under the
Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all
future Holders of this Security and of any Security issued in exchange herefor
or in lieu hereof, whether or not notation of such consent or waiver is made
upon this Security or such other Security.

          As provided in and subject to the provisions of the Indenture, the
Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the

                                                                             A-9

<PAGE>

appointment of a receiver or trustee or for any other remedy thereunder, unless
such Holder shall have previously given the Trustee written notice of a
continuing Event of Default, the Holders of not less than 25% in principal
amount of the Outstanding Securities shall have made written request to the
Trustee to institute proceedings in respect of such Event of Default as Trustee
and offered the Trustee reasonable indemnity, the Trustee shall have failed to
institute any such proceeding for 60 days after receipt of such notice, request
and offer of indemnity, and the Trustee has not received any direction
inconsistent with such written request from the Holders of a majority of the
aggregate principal amount of the Outstanding Securities during such 60 day
period. The foregoing shall not apply to any suit instituted by the Holder of
this Security for the enforcement of any payment of principal hereof, premium,
if any, or interest hereon on or after the respective due dates expressed herein
or for the enforcement of the right to convert this Security as provided in the
Indenture.

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

          As provided in the Indenture and subject to certain limitations
therein set forth, the transfer of Registered Securities is registrable on the
Security Register upon surrender of a Registered Security for registration of
transfer at the Corporate Trust Office of the Trustee or at such other office or
agency of the Company as may be designated by it for such purpose in the Borough
of Manhattan, The City of New York, or at such other offices or agencies as the
Company may designate, duly endorsed by, or accompanied by a written instrument
of transfer in form satisfactory to the Company and the Security Registrar duly
executed by, the Holder thereof or his attorney duly authorized in writing, and
thereupon one or more new Registered Securities, of authorized denominations and
for the same aggregate principal amount, will be issued to the designated
transferee or transferees by the Registrar. 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 recover any tax or other governmental charge
payable in connection therewith.

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

          Interest on the Securities shall be computed on the basis of a 360-day
year of twelve 30-day months. The Indenture and this Security shall be governed
by and construed in accordance with the laws of the State of New York, United
States of America, including, without limitation, Section 5-1401 of the New York
General Obligations Law.

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

                                                                            A-10

<PAGE>

                                    EXHIBIT B

                    ELECTION OF HOLDER TO REQUIRE REPURCHASE

          1.   Pursuant to Section 12.1 of the Indenture, the undersigned hereby
elects to have this Security repurchased by the Company.

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

                                      Dated:
                                             ---------------------------

                                      ----------------------------------
                                      Signature

                                      Signature Guaranteed

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

Principal amount to be repurchased:

--------------------------------------------
(must be equal to U.S.$1,000 or any
greater integral multiple of U.S.$1,000):

Remaining principal amount following such repurchase:

          NOTICE: The signature to the foregoing election must correspond to the
name as written upon the face of this Security in every particular, without
alteration or any change whatsoever.

                                                                             B-1

<PAGE>

                                    EXHIBIT C

                                CONVERSION NOTICE

          The undersigned Holder of this Security hereby irrevocably exercises
the option to convert this Security, or any portion of the principal amount
hereof (which is an integral multiple of U.S.$1,000) below designated, into
shares of Common Stock in accordance with the terms of the Indenture referred to
in this Security and directs that such shares, together with a check in payment
for any fractional share and any Securities representing any unconverted
principal amount hereof, be delivered to and be registered in the name of the
undersigned unless a different name has been indicated below. If shares of
Common Stock or Securities are to be registered in the name of a Person other
than the undersigned, the undersigned will pay all transfer taxes payable with
respect thereto. Any amount required to be paid by the undersigned on account of
interest accompanies this Security.

Dated:
      ---------------------------         -------------------------------------
                                                        Signature
If shares or Registered Securities
are to be registered in the name          If only a portion of the Securities
of a Person other than the Holder,        is to be converted, please indicate:
please print such person's name
and address:

                                          1.  Principal amount to be converted:
---------------------------------
                                              U.S.$____________________________
---------------------------------             (any integral multiple of
             Address                          U.S. $1,000)

                                          2.  Principal amount and denomination
---------------------------------             of Registered Securities
Social Security or other Taxpayer             representing unconverted principal
Identification Number, if any                 amount to be issued:

---------------------------------         Amount: U.S.$_________________________
    [Signature Guaranteed]

                                                                             C-1

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