<PAGE>
                                                                     Exhibit 4.2
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                         INTERNET CAPITAL GROUP, INC.


                                      and


                        CHASE MANHATTAN TRUST COMPANY,
                             NATIONAL ASSOCIATION
                                  as Trustee


                                   INDENTURE


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

                         Dated as of December 21, 1999

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




                5 1/2% Convertible Subordinated Notes due 2004





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<PAGE>

                               TABLE OF CONTENTS
                               -----------------

<TABLE>
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                                                                                                                         PAGE
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<S>       <C>                                                                                                            <C>
ARTICLE I           Definitions and Other Provisions of General Application................................................ 1

         Section 1.01.     Definitions..................................................................................... 1
         Section 1.02.     Compliance Certificates and Opinions............................................................ 9
         Section 1.03.     Form of Documents Delivered to Trustee.......................................................... 9
         Section 1.04.     Acts of Holders................................................................................ 10
         Section 1.05.     Notices, Etc., ................................................................................ 12
         Section 1.06.     Notice to Holders; Waiver...................................................................... 12
         Section 1.07.     Effect of Headings and Table of Contents....................................................... 12
         Section 1.08.     Successors and Assigns......................................................................... 13
         Section 1.09.     Separability Clause............................................................................ 13
         Section 1.10.     Benefits of Indenture.......................................................................... 13
         Section 1.11.     Governing Law.................................................................................. 13
         Section 1.12.     Legal Holidays................................................................................. 13
         Section 1.13.     Personal Immunity from Liability for Incorporators, Stockholders, Etc.......................... 13
         Section 1.14.     Conflict with Trust Indenture Act.............................................................. 13

ARTICLE II          Securities Forms...................................................................................... 14

         Section 2.01.     Forms of Securities............................................................................ 14
         Section 2.02.     Form of Trustee's Certificate of Authentication................................................ 14
         Section 2.03.     Securities Issuable in Global Form............................................................. 14

ARTICLE III         The Securities........................................................................................ 15

         Section 3.01.     Title and Term................................................................................. 15
         Section 3.02.     Denominations.................................................................................. 15
         Section 3.03.     Execution, Authentication, Delivery and Dating................................................. 15
         Section 3.04.     Registration, Registration of Transfer and Exchange............................................ 16
         Section 3.05.     Mutilated, Destroyed, Lost and Stolen Securities............................................... 18
         Section 3.06.     Payment of Interest; Interest Rights Preserved................................................. 19
         Section 3.07.     Persons Deemed Owners.......................................................................... 20
         Section 3.08.     Cancellation................................................................................... 20
         Section 3.09.     Computation of Interest........................................................................ 21

ARTICLE IV          Satisfaction and Discharge............................................................................ 21

         Section 4.01.     Satisfaction and Discharge of Indenture........................................................ 21
         Section 4.02.     Application of Trust Funds..................................................................... 22

ARTICLE V           Remedies.............................................................................................. 23

         Section 5.01.     Events of Default.............................................................................. 23
         Section 5.02.     Acceleration of Maturity; Rescission and Annulment............................................. 24
</TABLE>

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<TABLE>
<S>      <C>                                                                                                               <C>
         Section 5.03.     Collection of Indebtedness and Suits for Enforcement by Trustee................................ 25
         Section 5.04.     Trustee May File Proofs of Claim............................................................... 26
         Section 5.05.     Trustee May Enforce Claims Without Possession of Securities.................................... 27
         Section 5.06.     Application of Money Collected................................................................. 27
         Section 5.07.     Limitation on Suits............................................................................ 28
         Section 5.08.     Unconditional Right of Holders to Receive Principal, Premium, If Any, and Interest............. 28
         Section 5.09.     Restoration of Rights and Remedies............................................................. 28
         Section 5.10.     Rights and Remedies Cumulative................................................................. 29
         Section 5.11.     Delay or Omission Not Waiver................................................................... 29
         Section 5.12.     Control by Holders of Securities............................................................... 29
         Section 5.13.     Waiver of Past Defaults........................................................................ 29
         Section 5.14.     Waiver of Usury, Stay or Extension Laws........................................................ 30
         Section 5.15.     Undertaking for Costs.......................................................................... 30

ARTICLE VI          The Trustee........................................................................................... 31

         Section 6.01.     General........................................................................................ 31
         Section 6.02.     Certain Rights of Trustee...................................................................... 31
         Section 6.03.     Individual Rights of Trustee................................................................... 33
         Section 6.04.     Trustee's Disclaimer........................................................................... 33
         Section 6.05.     Notice of Default.............................................................................. 33
         Section 6.06.     Conflicting Interests of Trustee............................................................... 33
         Section 6.07.     Compensation and Indemnity..................................................................... 33
         Section 6.08.     Replacement of Trustee......................................................................... 34
         Section 6.09.     Successor Trustee by Merger, Etc............................................................... 35
         Section 6.10.     Eligibility.................................................................................... 35
         Section 6.11.     Money Held in Trust............................................................................ 35
         Section 6.12.     Withholding Taxes.............................................................................. 35
         Section 6.13.     Preferential Collection of Claims.............................................................. 36
         Section 6.14.     Trustee's Application for Instructions from the Company ....................................... 36

ARTICLE VII         Holders' Lists and Reports by Trustee and Company..................................................... 36

         Section 7.01.     Disclosure of Names and Addresses of Holders................................................... 36
         Section 7.02.     Reports by Trustee............................................................................. 36
         Section 7.03.     Reports by Company............................................................................. 37
         Section 7.04.     Company to Furnish Trustee Names and Addresses of Holders...................................... 37

ARTICLE VIII        Consolidation, Merger, Sale, Lease or Conveyance...................................................... 38

         Section 8.01.     Consolidations and Mergers of Company and Sales, Leases and
                           Conveyances Permitted Subject to Certain Conditions............................................ 38
         Section 8.02.     Rights and Duties of Successor Corporation..................................................... 38
         Section 8.03.     Officers' Certificate and Opinion of Counsel................................................... 39
</TABLE>
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<TABLE>
<S>      <C>                                                                                                               <C>
ARTICLE IX          Supplemental Indentures............................................................................... 39

         Section 9.01.     Supplemental Indentures Without Consent of Holders ............................................ 39
         Section 9.02.     Supplemental Indentures with Consent of Holders................................................ 40
         Section 9.03.     Execution of Supplemental Indentures........................................................... 41
         Section 9.04.     Effect of Supplemental Indentures.............................................................. 41
         Section 9.05.     Conformity with Trust Indenture Act............................................................ 41
         Section 9.06.     Reference in Securities to Supplemental Indentures ............................................ 41

ARTICLE X           Covenants............................................................................................. 41

         Section 10.01.    Payment of Principal, Premium, If Any, and Interest............................................ 41
         Section 10.02.    Maintenance of Office or Agency................................................................ 42
         Section 10.03.    Money for Securities Payments to Be Held in Trust.............................................. 42
         Section 10.04.    Existence...................................................................................... 43
         Section 10.05.    Payment of Taxes and Other Claims.............................................................. 44
         Section 10.06.    Statement as to Compliance..................................................................... 44
         Section 10.07.    Waiver of Certain Covenants.................................................................... 44

ARTICLE XI          Redemption of Securities.............................................................................. 44

         Section 11.01.    Provisional and Optional Redemption by the Company ............................................ 44
         Section 11.02.    Election to Redeem; Notice to Trustee.......................................................... 45
         Section 11.03.    Selection by Trustee of Securities to Be Redeemed.............................................. 45
         Section 11.04.    Notice of Redemption........................................................................... 46
         Section 11.05.    Deposit of Redemption Price.................................................................... 47
         Section 11.06.    Securities Payable on Redemption Date.......................................................... 48
         Section 11.07.    Securities Redeemed in Part.................................................................... 48

ARTICLE XII         Repurchase at Option of Holders upon Change in Control................................................ 49

         Section 12.01.    Right to Require Repurchase.................................................................... 49
         Section 12.02.    Conditions to the Company's Election to Pay the Repurchase Price in Common Stock............... 49
         Section 12.03.    Notices; Method of Exercising Repurchase Right, Etc............................................ 50
         Section 12.04.    Certain Definitions............................................................................ 53
         Section 12.05.    Change in Control.............................................................................. 53
         Section 12.06.    References to Repurchase Price................................................................. 54

ARTICLE XIII        Conversion............................................................................................ 54

         Section 13.01.    Conversion Privilege and Conversion Price...................................................... 54
         Section 13.02.    Exercise of Conversion Privilege............................................................... 56
         Section 13.03.    Fractions of Shares............................................................................ 56
         Section 13.04.    Adjustment of Conversion Price................................................................. 57
         Section 13.05.    Notice of Adjustments of Conversion Price...................................................... 65
         Section 13.06.    Notice of Certain Corporate Action............................................................. 65
         Section 13.07.    Company's Obligation Regarding Common Stock.................................................... 66
         Section 13.08.    Taxes on Conversions........................................................................... 66
</TABLE>
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<TABLE>
<S>      <C>                                                                                                               <C>
         Section 13.09.    Covenant as to Common Stock.................................................................... 66
         Section 13.10.    Cancellation of Converted Securities........................................................... 67
         Section 13.11.    Provisions in Case of Reclassification, Consolidation, Merger or Sale of Assets................ 67
         Section 13.12.    Company's Obligation........................................................................... 67

ARTICLE XIV         Subordination......................................................................................... 67

         Section 14.01.    Securities Subordinate to Senior Indebtedness.................................................. 67
         Section 14.02.    Payment over of Proceeds upon Dissolution, Etc................................................. 68
         Section 14.03.    No Payment When Senior Indebtedness in Default................................................. 69
         Section 14.04.    Payment Permitted If No Default................................................................ 70
         Section 14.05.    Subrogation to Rights of Holders of Senior Indebtedness........................................ 70
         Section 14.06.    Provisions Solely to Define Relative Rights.................................................... 70
         Section 14.07.    Trustee to Effectuate Subordination............................................................ 71
         Section 14.08.    No Waiver of Subordination Provisions.......................................................... 71
         Section 14.09.    Notice to Trustee.............................................................................. 72
         Section 14.10.    Reliance on Judicial Order or Certificate of Liquidating Agent................................. 72
         Section 14.11.    Trustee Not Fiduciary for Holders of Senior Indebtedness....................................... 73
         Section 14.12.    Rights of Trustee as Holder of Senior Indebtedness; Preservation of Trustee's Rights........... 73
         Section 14.13.    Article Applicable to Paying Agents............................................................ 73
         Section 14.14.    Certain Conversions Deemed Payment............................................................. 73


SIGNATURES
ACKNOWLEDGMENTS

EXHIBIT A - FORMS OF CERTIFICATION
EXHIBIT A-2 - FORM OF RESTRICTIVE LEGEND
</TABLE>
<PAGE>

           INDENTURE, dated as of December 21, 1999, between INTERNET CAPITAL
GROUP, INC., a Delaware corporation (the "Company"), having its principal office
at 435 Devon Park Drive, Building 800, Wayne, Pennsylvania 19087 and CHASE
MANHATTAN TRUST COMPANY, NATIONAL ASSOCIATION, a national banking association
organized under the laws of the United States of America, as Trustee hereunder
(the "Trustee"), having an office at One Liberty Place, 52nd Floor, 1650 Market
Street, Suite 5210, Philadelphia, Pennsylvania 19103.

                            RECITALS OF THE COMPANY

           The Company has duly authorized the issue of its 5 1/2% Convertible
Subordinated Notes due 2004 (the "Securities"), and to provide for such
issuance, the Company has duly authorized the execution and delivery of this
Indenture.

           This Indenture is subject to the provisions of the Trust Indenture
Act of 1939 that are deemed to be incorporated into this Indenture and shall, to
the extent applicable, be governed by such provisions.

           All things necessary to make this Indenture a valid agreement of the
Company, in accordance with its terms, 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 the holders of the Securities, as
follows:

                                   ARTICLE I

            Definitions and Other Provisions of General Application


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

                   (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 other terms used herein which are defined in the TIA,
either directly or by reference therein, have the meanings assigned to them
therein, and the terms "cash transaction" and "self-liquidating paper," as used
in TIA Section 311, shall have the meanings assigned to them in the rules of the
Commission adopted under the TIA;

                   (c) all accounting terms not otherwise defined herein have
the meanings assigned to them in accordance with GAAP;
<PAGE>

                   (d) the word "including" means "including without
limitation," and

                   (e) 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.

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

           "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.

           "Authorized Newspaper" means a newspaper, printed in the English
language or in an official language of the country of publication, customarily
published on each Business Day, whether or not published on Saturdays, Sundays
or holidays, and of general circulation in each place in connection with which
the term is used or in the financial community of each such place. Whenever
successive publications are required to be made in Authorized Newspapers, the
successive publications may be made in the same or in different Authorized
Newspapers in the same city meeting the foregoing requirements and in each case
on any Business Day.

           "Bankruptcy Law" has the meaning specified in Section 5.01.

           "Board of Directors" means the board of directors of the Company, the
executive committee of that board or any committee of that board duly authorized
to act hereunder.

           "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

           "Business Day" when used with respect to any Place of Payment or any
other particular location referred to in this Indenture or in the Securities,
means, any day, other than a Saturday or Sunday, that is neither a legal holiday
nor a day on which banking institutions in that Place of Payment or particular
location are authorized or required by law, regulation or executive order to
close.

           Eclipsing Price" has the meaning specified in Section 13.03.

           "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Securities Exchange Act of 1934, or,
if at any time after

                                      -2-
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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 on such date.

           "Common Stock" means the common stock of the Company, $0.001 par
value, as it exists on the date of this Indenture and any shares of any class or
classes of capital stock of the Company resulting from any reclassification or
reclassifications thereof.

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

           "Company Request" and "Company Order" mean, respectively, a written
request or order signed in the name of the Company by the Chief Executive
Officer, Chief Financial Officer, the President, a Vice President or a Managing
Director of the Company and delivered to the Trustee.

           "Conversion Agent" means any Person authorized by the Company
pursuant to Section 10.02 to convert Securities in accordance with Article 13.

           "Conversion Rate" has the meaning specified in Section 13.01.

           "Corporate Trust Office" means the office of the Trustee at which, at
any particular time, its corporate trust business as it relates to this
Indenture shall be principally administered, which office at the date hereof is
located at Chase Manhattan Trust Company, One Liberty Place, 52nd Floor, 1650
Market Street, Suite 5210, Philadelphia, Pennsylvania 19103, Attention: Capital
Markets Fiduciary Services (Internet Capital Group 5 1/2% Convertible
Subordinated Notes due 2004).

           "corporation" means a corporation, association, partnership,
companies (including limited liability companies) joint-stock company or
business trust.

           "Custodian" has the meaning specified in Section 5.01.

           "Defaulted Interest" has the meaning specified in Section 3.06.

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

           "DTC" means The Depository Trust Company.

           "Event of Default" has the meaning specified in Article 5.

           "GAAP" means generally accepted accounting principles, as in effect
from time to time, as used in the United States, applied on a consistent basis.

                                      -3-
<PAGE>

           "Government Obligations" means securities which are (i) direct
obligations of the United States of America, for the payment of which its full
faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of the United States of
America, the payment of which is unconditionally guaranteed as a full faith and
credit obligation by the United States of America, which is not callable or
redeemable at the option of the issuer thereof, and shall also include a
depository receipt issued by a bank or trust company as custodian with respect
to any such Government Obligation or a specific payment of interest on or
principal of any such Government Obligation held by such custodian for the
account of the holder of a depository receipt, provided that (except as required
by law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the Government Obligation or the specific payment of
interest on or principal of the Government Obligation evidenced by such
depository receipt.

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

           "Indebtedness" means, with respect to any Person, and without
duplication, (a) all indebtedness, obligations and other liabilities (contingent
or otherwise) of such Person for borrowed money (including obligations of such
Person in respect of overdrafts, foreign exchange contracts, currency exchange
or similar agreements, interest rate protection, hedging or similar agreements,
and any loans or advances from banks, whether or not evidenced by notes or
similar instruments) or evidenced by bonds, debentures, notes or similar
instruments (whether or not the recourse of the lender is to the whole of the
assets of such Person or to only a portion thereof) other than any account
payable or other accrued current liability or obligation, in each case incurred
in the ordinary course of business in connection with the obtaining of materials
or services; (b) all reimbursement obligations and other liabilities (contingent
or otherwise) of such Person with respect to letters of credit, bank guarantees,
bankers acceptances, security purchase facilities or similar credit
transactions; (c) all obligations and liabilities (contingent or otherwise) in
respect of deferred and unpaid balances on any purchase price of any property,
including interests in Partner Companies; (d) all obligations and liabilities
(contingent or otherwise) in respect of leases of such Person required, in
conformity with generally accepted accounting principles, to be accounted for as
capitalized lease obligations on the balance sheet of such Person and all
obligations and other liabilities (contingent or otherwise) under any lease or
related document, including, without limitation, the balance deferred and unpaid
on any purchase price of any property and a purchase agreement in connection
with the lease of real property which provides that such Person is contractually
obligated to purchase or cause a third party to purchase the leased property and
thereby guarantee a minimum residual value of the leased property to the lessor
and the obligations of such Person under such lease or related document to
purchase or to cause a third party to purchase such leased property; (e) all
obligations of such Person (contingent or otherwise) with respect to an interest
rate or other swap, cap or collar agreement or other similar instrument or
agreement or foreign currency hedge, exchange, purchase or similar instrument or
agreement; (f) all direct or indirect guarantees or similar agreements by such
Person in respect of, and obligations or liabilities (contingent or otherwise)

                                      -4-
<PAGE>

of such Person to purchase or otherwise acquire or otherwise assure a creditor
against loss in respect of indebtedness, obligations or liabilities of another
Person of the kind described in clauses (a) through (f); (g) any indebtedness or
other obligations described in clauses (a) through (f) secured by any mortgage,
pledge, lien or other encumbrance existing on property which is owned or held by
such Person, regardless of whether the indebtedness or other obligation secured
thereby shall have been assumed by such Person; and (h) any and all deferrals,
renewals, extensions, refinancing, replacements, restatements and refundings of,
or amendments, modifications or supplements to, or any indebtedness, or
obligation issued in exchange for, any indebtedness, obligation or liability of
the kind described in clauses (a) through (g).

           "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.

           "Interest Payment Date," means the Stated Maturity of an installment
of interest on such Security.

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

           "Maturity," means the date on which the principal of the Securities
becomes due and payable as therein or herein provided, whether at the Stated
Maturity, conversion or by declaration of acceleration, notice of redemption,
notice of option to elect repayment or otherwise.

           "Material Adverse Effect" has the meaning specified in Section 10.04.

           "Officers Certificate" means a certificate signed by the Chairman of
the Board of Directors, a Managing Director, the President or a Vice President
and by 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 the Company or who may be an employee of or other counsel for the
Company and who shall be reasonably satisfactory 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:

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

                 (ii) Securities, or portions thereof, for whose payment or
redemption or repayment at the option of the Holder, money in the necessary
amount has been theretofore deposited with the Trustee or any Paying Agent
(other than the Company) in trust or set aside and segregated in trust by the
Company (if the Company shall act as its own Paying

                                      -5-
<PAGE>

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;

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

                 (iv)    Securities converted into Common Stock pursuant to or
in accordance with this Indenture;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder or are present at
a meeting of Holders for quorum purposes, and for the purpose of making the
calculations required by TIA Section 313, Securities owned by the Company or any
other obligor upon the Securities or any Affiliate of the Company or of such
other obligor shall be disregarded and deemed not to be Outstanding, except
that, in determining whether the Trustee shall be protected in making such
calculation or in relying upon any such request, demand, authorization,
direction, notice, consent or waiver, only Securities which the Trustee knows to
be so owned shall be so disregarded. Securities so owned which have been pledged
in good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee's right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

           "Partner Company" means a Person some or all of whose outstanding
voting securities are owned or are hereafter acquired, directly or indirectly,
by the Company or one of its Subsidiaries.

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

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

           "Place of Payment," means the place or places where the principal of
(and premium, if any), interest on and the Redemption Prices and the Repurchase
Price with respect to the Securities are payable as specified as contemplated by
Section 10.2.

           "Predecessor Security" means every previous Security evidencing all
or a portion of the same debt as that evidenced by such Security; and, for the
purposes of this definition, any Security authenticated and delivered under
Section 3.05 in exchange for or in lieu

                                      -6-
<PAGE>

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

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

     "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.

     "Regular Record Date" for the interest payable on any Interest Payment Date
on the Securities means the date specified for that purpose as contemplated by
Section 3.06, whether or not a Business Day.

     "Repurchase Date" means, when used with respect to any Security to be
repaid at the option of the Holder, the date fixed for such repayment by or
pursuant to this Indenture.

     "Repurchase Price" means, when used with respect to any Security to be
repaid at the option of the Holder, the price at which it is to be repaid by or
pursuant to this Indenture.

     "Responsible Officer," when used with respect to the Trustee, means the
chairman or vice-chairman of the Board of Directors, the chairman or
vice-chairman of the executive committee of the Board of Directors, the
president, any vice president (whether or not designated by a number or a word
or words added before or after the title "vice president,") the secretary, any
assistant secretary, the treasurer, any assistant treasurer, any corporate trust
officer, the controller or any other officer 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 such officer's
knowledge and familiarity with the particular subject.

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

     "Security Register" and "Security Registrar" have the respective meanings
specified in Section 3.04.

     "Senior Indebtedness" means the principal of, premium, if any, 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) and all other amounts
owed in respect of all Indebtedness of the Company, whether outstanding on the
date of this Indenture or thereafter created, incurred, assumed, guaranteed or
in effect guaranteed by the Company (including all deferrals, renewals,
extensions, refinancings, replacements, restatements or refundings of, or
amendments, modifications or supplements to, the foregoing); except for (i) any
such Indebtedness the terms of which expressly provide that such Indebtedness
shall not be senior in right of payment to the Securities, (ii) any such

                                      -7-
<PAGE>

Indebtedness that is by its terms subordinated to or pari passu with the
Securities, and (iii) any Indebtedness between or among the Company or any of
its Subsidiaries or its Affiliates, including all other debt securities and
guarantees in respect of those debt securities issued to any trust, or trustees
of any trust, partnership or other entity affiliated with the Company that is,
directly or indirectly, a financing vehicle used by the Company in connection
with the issuance by that financing vehicle of preferred securities or other
securities that rank pari passu with, or junior to, the Securities but excluding
any Indebtedness incurred by the Company in connection with its acquisition of
beneficial interests in a Partner Company.

     "Significant Subsidiary" means any Subsidiary which is a "significant
subsidiary" (as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated
under the Securities Act of 1933) of the Company.

     "Special Record Date" for the payment of any Defaulted Interest on the
Securities means a date fixed by the Trustee pursuant to Section 3.06.

     "Stated Maturity," means the date specified in the Securities as the fixed
date on which the principal of, or interest on, such Securities is due and
payable.

     "Subsidiary" means a corporation a majority of the outstanding voting stock
of which is owned, directly or indirectly, by the Company or by one or more
other Subsidiaries of the Company, or by the Company and one or more other
Subsidiaries. For the purposes of this definition, "voting stock" means stock
that ordinarily has voting power for the election of directors, whether at all
times or only so long as no senior class of stock has such voting power by
reason of any contingency.

     "Trading Day" has the meaning specified in Section 13.03.

     "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939, as in
force at the date hereof; provided, however, that in the event the Trust
Indenture Act of 1939 or such rules and regulations are amended after such date,
"Trust Indenture Act" means, to the extent required by any such amendment, the
Trust Indenture Act of 1939 and such rules and regulations as so amended.

     "Trustee" means the Person named as the "Trustee" in the first paragraph of
this Indenture until a successor Trustee shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Trustee" shall mean or
include each Person who is then a Trustee hereunder.

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

     "United States person" means an individual who is a citizen or resident of
the United States, a corporation, partnership or other entity created or
organized in or under the laws

                                      -8-
<PAGE>

of the United States or an estate or trust the income of which is subject to
United States federal income taxation regardless of its source.

     Section 1.02 Compliance Certificates and Opinions. Upon any application or
request by the Company to the Trustee to take any action under any provision of
this Indenture, the Company shall furnish to the Trustee an Officers'
Certificate stating that all conditions precedent, if any, provided for in this
Indenture relating to the proposed action have been complied with and 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
refurnished.

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

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

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

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

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

     Section 1.03 Form of Documents Delivered to Trustee. In any case where
several matters are required to be certified by, or covered by an opinion of,
any specified Person, it is not necessary that all such matters be certified by,
or covered by the opinion of, only one such Person, or that they be so certified
or covered by only one document, but one such Person may certify or give an
opinion as 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 an Opinion of Counsel, or a certificate or
representations by counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the opinion, certificate or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such Opinion of Counsel or certificate or representations may be
based, insofar as it relates to factual matters, upon a certificate or opinion
of, or representations by, an officer or officers of the Company stating that
the information as to such factual matters is

                                      -9-
<PAGE>

in the possession of the Company, unless such counsel knows that the certificate
or opinion or representations as to such matters are erroneous.

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

     Section 1.04 Acts of Holders. (a) Any request, demand, authorization,
direction, notice, consent, waiver or other action provided by this Indenture to
be given or taken by Holders of the Outstanding Securities, may be embodied in
and evidenced by one or more instruments of substantially similar tenor signed
by such Holders in person or by agents duly appointed in writing. Except as
herein otherwise expressly provided, such action shall become effective when
such instrument or instruments or record or both are delivered to the Trustee
and, where it is hereby expressly required, to the Company. Such instrument or
instruments and any such record (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Holders signing
such instrument or instruments or so voting at any such meeting. Proof of
execution of any such instrument or of a writing appointing any such agent, or
of the holding by any Person of a Security, shall be sufficient for any purpose
of this Indenture and conclusive in favor of the Trustee and the Company and any
agent of the Trustee or the Company, if made in the manner provided in this
Section 1.04.

                  (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. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be proved
in any other reasonable manner which the Trustee deems sufficient.

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

                  (d) (i) If the Company shall solicit from the Holders of any
request, demand, authorization, direction, notice, consent, waiver or other Act,
the Company may, at its option, in or pursuant to a Board Resolution, fix in
advance a record date for the determination of Holders entitled to give such
request, demand, authorization, direction, notice, consent, waiver or other Act,
but the Company shall have no obligation to do so; provided that the Company
shall not be entitled to set a record date for, and the provisions of this
paragraph shall not apply with respect to, the giving or making of any notice,
declaration, request or direction referred to in clause 1.04(d)(iii) below.
Notwithstanding TIA Section 316(c), such record date shall be the record date
specified in or pursuant to such Board Resolution, which shall be a date not
earlier than the date 30 days prior to the first solicitation of Holders
generally in connection therewith and not later than the date such solicitation
is completed. If such a record date is fixed, such

                                     -10-
<PAGE>

request, demand, authorization, direction, notice, consent, waiver or other Act
may be given before or after such record date, but only the Holders of record at
the close of business on such record date shall be deemed to be Holders for the
purposes of determining whether Holders of the requisite proportion of
Outstanding Securities have authorized or agreed or consented to such request,
demand, authorization, direction, notice, consent, waiver or other Act, and for
that purpose the Outstanding Securities shall be computed as of such record
date; provided that no such authorization, agreement or consent by the Holders
on such record date shall be deemed effective unless it shall become effective
pursuant to the provisions of this Indenture not later than eleven months after
the record date.

                (ii)  Subject to clause 1.04(d)(iii) below, in the absence of
any such record date fixed by the Company, regardless as to whether any
solicitation of the Holders is occurring on behalf of the Company or any Holder,
the Trustee may, at its option, fix in advance a record date for the
determination of such Holders entitled to give such request, demand,
authorization, direction, notice, consent, waiver or other Act, but the Trustee
shall have no obligation to do so. Any such record date shall be a date not more
than 30 days prior to the first solicitation of Holders generally in connection
therewith and no later than the date of such solicitation.

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

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

                                     -11-
<PAGE>

     Section 1.05 Notices, Etc., to Trustee and Company. Any request, demand,
authorization, direction, notice, consent, waiver or Act of Holders or other
document provided or permitted by this Indenture to be made upon, given or
furnished to, or filed with:

                  (a) the Trustee by any Holder or by the Company shall be
sufficient for every purpose hereunder if made, given, furnished or filed in
writing to or with the Trustee at its Corporate Trust Office, Attention: Capital
Markets Fiduciary Services; provided that notices to the Trustee shall only be
deemed given when actually received by the Trustee,

                  (b) the Company by the Trustee or by any Holder shall be
sufficient for every purpose hereunder (unless otherwise herein expressly
provided) if in writing and mailed, first class postage prepaid, to the Company
addressed to it at the address of its principal office specified in the first
paragraph of this Indenture or at any other address previously furnished in
writing to the Trustee by the Company.

     Section 1.06 Notice to Holders; Waiver. Where this Indenture provides for
notice of any event to Holders by the Company or the Trustee, such notice shall
be sufficiently given (unless otherwise herein expressly provided) if in writing
and mailed, first-class postage prepaid, to each such Holder affected by such
event, at his address as it appears in the Security Register, not later than the
latest date, and not earlier than the earliest date, prescribed for the giving
of such notice. In any case where notice to Holders is given by mail, neither
the failure to mail such notice, nor any defect in any notice so mailed, to any
particular Holder shall affect the sufficiency of such notice with respect to
other Holders given as provided herein. Any notice mailed to a Holder in the
manner herein prescribed shall be conclusively deemed to have been received by
such Holder, whether or not such Holder actually receives such notice.

If by reason of the suspension of or irregularities in 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 as shall be made with the approval of
the Trustee shall constitute a sufficient notification to such Holders for every
purpose hereunder.

Any request, demand, authorization, direction, notice, consent 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.

Where this Indenture provides for notice in any manner, such notice maybe 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 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 1.07 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.

                                     -12-
<PAGE>

     Section 1.08 Successors and Assigns. All covenants and agreements in this
Indenture by the Company shall bind its successors and assigns, whether so
expressed or not.

     Section 1.09 Separability Clause. In case any provision in this Indenture
or in any Security 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. Nothing in this Indenture or in the
Securities, express or implied, shall give to any Person, other than the parties
hereto, any Security Registrar, any Paying Agent and their successors hereunder
and the Holders any benefit or any legal or equitable right, remedy or claim
under this Indenture.

     Section 1.11 Governing Law. This Indenture and the Securities shall be
governed by and construed in accordance with the law of the State of New York
without regard to conflicts of laws principles. This Indenture is subject to the
provisions of the TIA that are required to be part of this Indenture and shall,
to the extent applicable, be governed by such provisions.

     Section 1.12 Legal Holidays. In any case where any Interest Payment Date,
Redemption Date, Repurchase Date, Stated Maturity or Maturity of any Security or
the last date on which a Holder has the right to convert his Securities shall
not be a Business Day at any Place of Payment, then (notwithstanding any other
provision of this Indenture or any Security), payment of Redemption Price,
Repurchase Price, interest or principal (and premium, if any), or conversion of
the Securities, need not be made at such Place of Payment on such date, but may
be made on the next succeeding Business Day at such Place of Payment with the
same force and effect as if made on the Interest Payment Date, Redemption Date,
Repurchase Date or at the Stated Maturity or Maturity or on such last day for
conversion; provided that 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 Maturity or on such last day for conversion,
as the case may be.

     Section 1.13 Personal Immunity from Liability for Incorporators,
Stockholders, Etc. No recourse shall be had for the payment of the principal of
or premium, if any, or interest, if any, on any Security, or for any claim based
thereon, or otherwise in respect of any Security, or based on or in respect of
this Indenture or any indenture supplemental hereto, against any incorporator,
or against any past, present or future stockholder, director or officer, as
such, of the Company or of any successor corporation, whether by virtue of any
constitution, statute or rule of law, or by the enforcement of any assessment or
penalty or otherwise, all such liability being expressly waived and released as
a condition of, and as consideration for, the execution of this Indenture and
the issue of Securities.

     Section 1.14 Conflict with Trust Indenture Act. If any provision hereof
limits, qualifies or conflicts with a provision of the TIA which is required
under such Act to be a part of and govern this Indenture, the latter provision
shall control. If any provision of this Indenture modifies or excludes any
provision of the TIA which may be so modified or excluded, the latter provision
shall be deemed to apply to this Indenture as so modified or to be excluded, as
the case

                                     -13-
<PAGE>

may be. To the extent a Security conflicts with a provision in the Indenture,
the Indenture governs.

                                   ARTICLE II

                                Securities Forms


     Section 2.01 Forms of Securities. The Securities shall be in substantially
the form of Exhibit A hereto, and shall have notations, legends or endorsements
required by law, stock exchange rate or usage. Except as otherwise provided in a
Company Order, all Securities other than Securities issuable in global form
shall be issued in definitive form and shall include a legend substantially in
the Form of Exhibit A-2 attached hereto.

     Section 2.02 Form of Trustee's Certificate of Authentication.

The Trustee's certificate of authentication shall be in substantially the
following form:

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

DATED:

                                         --------------------------------
                                         as Trustee

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

     Section 2.03 Securities Issuable in Global Form. Except as otherwise
provided in this Section 2.03, the Securities shall be issuable in global form,
and any such Security shall represent such of the Outstanding Securities as
shall be specified therein and may provide that it shall represent the aggregate
amount of Outstanding Securities from time to time endorsed thereon and that the
aggregate amount of Outstanding Securities represented thereby may from time to
time be increased or decreased to reflect exchanges. Any endorsement of a
Security in global form to reflect the amount, or any increase or decrease in
the amount, of Outstanding Securities represented thereby shall be made by the
Trustee in such manner and upon instructions given by such Person or Persons as
shall be specified therein or in the Company Order to be delivered to the
Trustee pursuant to Section 3.03. Subject to the provisions of Section 3.03, the
Trustee shall deliver and redeliver any Security in global form in the manner
and upon instructions given by the Person or Persons specified therein or in the
applicable Company Order. If a Company Order pursuant to Section 3.03 has been,
or simultaneously is, delivered, any instructions by the Company with respect to
endorsement or delivery or redelivery of a Security in global form shall be in
writing but need not comply with Section 1.02 and need not be accompanied by an
Opinion of Counsel.

                                     -14-
<PAGE>

     The provisions of the last sentence of Section 3.03 shall apply to any
Security represented by a Security in global form if such Security was never
issued and sold by the Company and the Company delivers to the Trustee the
Security in global form together with written instructions (which need not
comply with Section 1.02 and need not be accompanied by an Opinion of Counsel)
with regard to the reduction in the principal amount of Securities represented
thereby, together with the written statement contemplated by the last sentence
of Section 3.03.

     Notwithstanding the provisions of Section 3.07, payment of principal of and
any premium and interest on any Security in global form shall be made to the
Person or Persons specified therein.

     Notwithstanding the provisions of Section 3.07 and except as provided in
the preceding paragraph, the Company, the Trustee and any agent of the Company
and the Trustee shall treat as the Holder of such principal amount of
Outstanding Securities represented by a global Security as the Holder of such
global Security in registered form.

     At the instruction of the Company, any Security may be issued in definitive
form, subject to Section 2.01 hereof.

                                  ARTICLE III

                                 The Securities


     Section 3.01 Title and Term. The Securities shall be and are hereby
authorized to be designated as "5 1/2% Convertible Subordinated Notes due 2004",
limited in aggregate principal amount to $566,250,000. The Securities shall
mature and the principal thereof shall be due and payable, together will all
accrued and unpaid interest thereon, on December 21, 2004. The Securities shall
be convertible into shares of Common Stock, $0.001 par value, of the Company, as
such shares shall be constituted at the time of conversion, in accordance with
Article 13 hereof.

     Section 3.02 Denominations. The Securities shall be issuable in
denominations of $1,000 and any integral multiple thereof.

     Section 3.03 Execution, Authentication, Delivery and Dating. The Securities
shall be executed on behalf of the Company by the Chief Executive Officer, Chief
Financial Officer, the President, a Vice President or a Managing Director of the
Company and attested by its Secretary or one of its Assistant Secretaries. The
signature of any of these individuals on the Securities may be manual or
facsimile signatures of the present or any future such authorized officer and
may be imprinted or otherwise reproduced on the Securities.

     Securities bearing the manual or facsimile signatures of individuals who
were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such

                                     -15-
<PAGE>

individuals or any of them have ceased to hold such offices prior to the
authentication and delivery of such Securities or did not hold such offices at
the date of such Securities.

     At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities, executed by the Company to the
Trustee for authentication, together with a Company Order for the authentication
and delivery of such Securities, and the Trustee in accordance with the Company
Order shall authenticate and deliver such Securities.

     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 duly
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
and is entitled to the benefits of this Indenture. Notwithstanding the
foregoing, if any Security shall have been authenticated and delivered hereunder
but never issued and sold by the Company, and the Company shall deliver such
Security to the Trustee for cancellation as provided in Section 3.08 together
with a written statement (which need not comply with Section 1.02 and need not
be accompanied by an Opinion of Counsel) stating that such Security has never
been issued and sold by the Company, for all purposes of this Indenture such to
have been authenticated and delivered hereunder and shall never be entitled to
the benefits of this Indenture.

     Section 3.04 Registration, Registration of Transfer and Exchange. The
Company shall cause to be kept at the Corporate Trust Office of the Trustee or
in any office or agency of the Company in a Place of Payment a register for the
Securities (the "Security Register") in which, subject to such reasonable
regulations as it may prescribe, the Company shall provide for the registration
of the Securities and of transfers of the Securities. The Security Register
shall be in written form or any other form capable of being converted into
written form within a reasonable time. The Trustee, at its Corporate Trust
Office, is hereby appointed "Security Registrar" for the purpose of registering
the Securities and transfers of the Securities on such Security Register as
herein provided. In the event that the Trustee shall cease to be Security
Registrar, it shall have the right to examine the Security Register at all
reasonable times.

     Subject to the provisions of this Section 3.04 and except as otherwise
provided in any Security including any legend thereon, upon surrender for
registration of transfer of any Security at any office or agency of the Company
in a Place of Payment, 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, bearing a number not contemporaneously
outstanding, and containing identical terms and provisions.

     Subject to the provisions of this Section 3.04, at the option of the
Holder, the Securities may be exchanged for other Securities, of any authorized
denomination or

                                     -16-
<PAGE>

denominations and of a like aggregate principal amount, containing identical
terms and provisions, upon surrender of the Securities to be exchanged at any
such office or agency. Whenever any such Securities are so surrendered for
exchange, the Company shall execute, and the Trustee shall authenticate and
deliver, the Securities which the Holder making the exchange is entitled to
receive.

     Notwithstanding the foregoing, any global Security shall be exchangeable
only as provided in this paragraph. The depositary for the global Securities
shall be DTC, and the global Securities may be transferred, in whole but not in
part, only to a nominee of DTC, or by a nominee of DTC to DTC, or to a successor
to DTC for such global Security selected or approved by the Company or to a
nominee of such successor to DTC. If at any time DTC notifies the Company that
it is unwilling or unable to continue as depositary for the applicable global
Security or Securities or if at any time DTC ceases to be a clearing agency
registered under the Securities Exchange Act of 1934 if so required by
applicable law or regulation, the Company shall appoint a successor depositary
with respect to such global Security or Securities. If (x) a successor
depositary for such global Security or Securities is not appointed by the
Company within 90 days after the Company receives such notice or becomes aware
of such unwillingness, inability or ineligibility, (y) an Event of Default has
occurred and is continuing and the beneficial owners representing a majority in
principal amount of the applicable Securities represented by such global
Security or Securities advise DTC to cease acting as depositary for such global
Security or Securities or (z) the Company, in its sole discretion, determines at
any time that all Outstanding Securities (but not less than all) issued or
issuable in the form of one or more global Securities shall no longer be
represented by such global Security or Securities, then the Company shall
execute, and the Trustee shall authenticate and deliver, definitive Securities
of like rank, tenor and terms in definitive form in an aggregate principal
amount equal to the principal amount of such global Security or Securities. If a
Security is issued in exchange for any portion of a global Security after the
close of business at the office or agency where such exchange occurs on (i) any
Regular Record Date and before the opening of business at such office or agency
on the relevant Interest Payment Date or (ii) any Special Record Date and the
opening of business at such office or agency on the related proposed date for
payment of Defaulted Interest, interest or Defaulted Interest, as the case may
be, will not be payable on such Interest Payment Date or proposed date for
payment, as the case may be, in respect of such Security, but will be payable on
such Interest Payment Date or proposed date for payment, as the case may be,
only to the Person to whom interest in respect of such portion of such global
Security is payable in accordance with the provisions of this Indenture.

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

     Every Security presented or surrendered for registration of transfer or for
exchange or redemption 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

                                     -17-
<PAGE>

Company and the Security Registrar, duly executed by the Holder thereof or his
attorney duly authorized in writing.

     No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 10.05, 11.07 or 12.03(f) not involving any
transfer.

     The Company or the Trustee, as applicable, shall not be required (i) to
issue, register the transfer of or exchange any Security if such Security may be
among those selected for redemption during a period beginning at the opening of
business 15 days before selection of the Securities to be redeemed under Section
11.03 and ending at the close of business on the day of the mailing of the
relevant notice of redemption or (ii) to register the transfer of or exchange
any Security so selected for redemption in whole or in part, except, in the case
of any Security to be redeemed in part, the portion thereof not to be redeemed,
or (iii) to issue, register the transfer of or exchange any Security which has
been surrendered for repayment at the option of the Holder, except the portion,
if any, of such Security not to be so repaid.

     Section 3.05 Mutilated, Destroyed, Lost and Stolen Securities. If any
mutilated Security is surrendered to the Trustee or the Company, together with
such security or indemnity as may be required by the Company or the Trustee to
save each of them or any agent of either of them harmless, the Company shall, at
the relevant Holder's expense, execute and the Trustee shall authenticate and
deliver in exchange therefor a new Security of the same principal amount,
containing identical terms and provisions and bearing a number not
contemporaneously outstanding.

     If there shall be delivered to the Company and to the Trustee (i) evidence
to their satisfaction of the destruction, loss or theft of any Security and (ii)
such security or indemnity as may be required by them to save each of them and
any agent of either of them harmless, then, in the absence of notice to the
Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company, at the relevant Holder's expense, shall execute and upon
its request the Trustee shall authenticate and deliver, in lieu of any such
destroyed, lost or stolen Security, a new Security of the same principal amount,
containing identical terms and provisions and bearing a number not
contemporaneously outstanding, appertaining to such destroyed, lost or stolen
Security.

     Notwithstanding the provisions of the previous two paragraphs, 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 may, instead of issuing a
new Security, pay such Security.

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

                                     -18-
<PAGE>

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

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

     Section 3.06 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 at the office or agency of
the Company maintained for such purpose pursuant to Section 10.02; provided,
however, that each installment of interest on any Security may at the Company's
option be paid by (i) mailing a check for such interest, payable to or upon the
written order of the Person entitled thereto pursuant to Section 3.07, to the
address of such Person as it appears on the Security Register or (ii) transfer
to an account maintained by the payee located inside the United States;
provided, however, that payments to DTC will be made by wire transfer of
immediately available funds to the account of DTC or its nominee. The term
"Regular Record Date" with respect to any Interest Payment Date shall mean the
December 6 or June 6 preceding December 21 or June 21, respectively.

Any interest on any Security that is payable, but is not punctually paid or duly
provided for, on any Interest Payment Date (herein called "Defaulted Interest")
shall forthwith cease to be payable to the registered Holder thereof 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 3.06(a) or 3.06(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 and the date
of the proposed payment (which shall not be less than 30 days after such notice
is received by the Trustee) 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 on or prior to the date of the proposed payment,
such money when deposited to be held in trust for the benefit of the Persons
entitled to such Defaulted Interest as in this clause provided. Thereupon the
Trustee shall fix a Special Record Date for the payment of such Defaulted
Interest which shall be not more than 15 days and not less than 10 days prior to
the date of the proposed payment. The Trustee shall promptly notify the Company
of such Special Record Date and, in the name and at

                                      -19-
<PAGE>

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 of Securities at his address as it
appears in the Security Register not less than 10 days prior to such Special
Record Date. The Trustee may, in its discretion, in the name and at the expense
of the Company, cause a similar notice to be published at least once in an
Authorized Newspaper in each place of payment, but such publications shall not
be a condition precedent to the establishment of such Special Record Date.
Notice of the proposed payment of such Defaulted Interest and the Special Record
Date therefor having been mailed as aforesaid, 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 on
the Securities in any other lawful manner not inconsistent with the requirements
of any securities exchange on which such 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.

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

     Section 3.07 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 (and premium, if any), and (subject to Sections 3.04 and 3.06)
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.

            None of the Company, the Trustee, any Paying Agent or the Security
Registrar will have any responsibility or liability for any aspect of the
records relating to or payments made on account of beneficial ownership
interests of a Security in global form or for maintaining, supervising or
reviewing any records relating to such beneficial ownership interests.

            Notwithstanding the foregoing, with respect to any global Security,
nothing herein shall prevent the Company, the Trustee, or any agent of the
Company or the Trustee, from giving effect to any written certification, proxy
or other authorization furnished by any depositary, as a Holder, with respect to
such global Security or impair, as between such depositary and owners of
beneficial interests in such global Security, the operation of customary
practices governing the exercise of the rights of such depositary (or its
nominee) as Holder of such global Security.

     Section 3.08 Cancellation. All Securities surrendered for payment,
redemption, repayment at the option of the Holder, registration of transfer or
exchange or for credit against

                                      -20-
<PAGE>

any sinking fund payment shall, if surrendered to any Person other than the
Trustee, be delivered to the Trustee, and any such Securities surrendered
directly to the Trustee for any such purpose shall be promptly canceled by it;
provided, however, where the Place of Payment is located outside of the United
States, the Paying Agent at such Place of Payment may cancel the Securities
surrendered to it for such purposes prior to delivering the Securities to the
Trustee. The Company may at any time deliver to the Trustee for cancellation any
Securities previously authenticated and delivered hereunder which the Company
may have acquired in any manner whatsoever, and may deliver to the Trustee (or
to any other Person for delivery to the Trustee) for cancellation any Securities
previously authenticated hereunder which the Company has not issued and sold,
and all Securities so delivered shall be promptly canceled by the Trustee. If
the Company shall so acquire any of the Securities, however, such acquisition
shall not operate as a redemption or satisfaction of the indebtedness
represented by such Securities unless and until the same are surrendered to the
Trustee for cancellation. No Securities shall be authenticated in lieu of or in
exchange for any Securities canceled as provided in this Section, except as
expressly permitted by this Indenture. Canceled Securities held by the Trustee
shall be destroyed by the Trustee and the Trustee shall deliver a certificate of
such destruction to the Company, unless by a Company Order the Company directs
their return to it.

     Section 3.09 Computation of Interest. Interest on the Securities shall be
computed on the basis of a 360-day year consisting of twelve 30-day months.

                                   ARTICLE IV

                           Satisfaction and Discharge


     Section 4.01 Satisfaction and Discharge of Indenture. This Indenture shall
upon Company Request cease to be of further effect with respect to any Security
specified in such Company Request (except as to any surviving rights of
conversion, registration of transfer or exchange of Securities herein expressly
provided for), and the Trustee, upon receipt of a Company Order, and at the
expense of the Company, shall execute proper instruments acknowledging
satisfaction and discharge of this Indenture when:

                  (a)   either:

                        (i)   all Securities theretofore authenticated and
delivered have been delivered to the Trustee for cancellation; or

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

                              (A)  have become due and payable, or

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

                                      -21-
<PAGE>

                              (C) if redeemable at the option of the Company,
                    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 (A), (B) or (C) above, has irrevocably deposited
or caused to be deposited with the Trustee as trust funds in trust (1) an amount
of money, (2) Government Obligations that through the scheduled payment of
principal and interest in respect thereof in accordance with their terms will
provide, not later than one day before the due date of any payment, money in an
amount, or (3) a combination thereof, sufficient in each case to pay and
discharge the entire indebtedness on such Securities not theretofore delivered
to the Trustee for cancellation, for principal (and premium, if any) and
interest to the date of such deposit (in the case of Securities which have
become due and payable) or to the Stated Maturity or Redemption Date, as the
case may be;

                    (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 and an Opinion of Counsel, each stating that all conditions
precedent herein provided for relating to the satisfaction and discharge of this
Indenture have been complied with.

           Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee and any predecessor Trustee under
Section 6.07, and, if money shall have been deposited with and held by the
Trustee pursuant to Section 4.01(a)(ii), the obligations of the Trustee under
Section 4.02 and the last paragraph of Section 10.03 shall survive.

     Section 4.02 Application of Trust Funds. Subject to the provisions of the
last paragraph of Section 10.03, all amounts deposited with the Trustee pursuant
to Section 4.01 shall be held in trust and applied by it, in accordance with the
provisions of the Securities and this Indenture, to the payment, either directly
or through any Paying Agent (including the Company acting as its own Paying
Agent), as the Trustee may determine, to the Persons entitled thereto, of the
principal (and premium, if any) and any interest for whose payment such amounts
have been deposited with or received by the Trustee, but such amounts need not
be segregated from other funds except to the extent required by law. All moneys
deposited with the Trustee pursuant to Section 4.01 (and held by it or any
Paying Agent) for the payment of Securities subsequently converted shall be
returned to the Company upon Company Request.

                                      -22-
<PAGE>

                                   ARTICLE V

                                    Remedies


     Section 5.01 Events of Default. "Event of Default," wherever used herein
with respect to the Securities, means any one of the following events (whatever
the reason for such Event of Default and whether or not it shall be occasioned
by the provisions of Article 14 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 any interest upon any
Security, when such interest becomes due and payable, and continuance of such
default for a period of 30 days (whether or not such payment is prohibited by
the provisions of Article 14); or

                  (b)   default in the payment of (i) the principal of (or
premium, if any, on) any Security when it becomes due and payable at its
Maturity, or (ii) the payment of the Redemption Price (including the Make-Whole
Payment, if any) with respect to any Security when it becomes due and payable
(whether or not such payment is prohibited by the provisions of Article 14); or

                  (c)   default in the payment of the Repurchase Price in
respect of any Security on the Repurchase Date therefor (whether or not such
payment is prohibited by the provisions of Article 14 hereof); or

                  (d)   failure by the Company to deliver shares of Common Stock
(together with cash in lieu of fractional shares) when such Common Stock (or
cash in lieu of fractional shares) is required to be delivered following
conversion of a Security and continuation of such default for a period of 10
days; or

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

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

                                      -23-
<PAGE>

indebtedness becoming or being declared due and payable prior to the date on
which it would otherwise have become due and payable, without such indebtedness
having been discharged, or such acceleration having been rescinded or annulled,
within a period of 30 days after there shall have been given, by registered or
certified mail, to the Company by the Trustee or to the Company and the Trustee
by the Holders of at least 25% in principal amount of the Securities then
Outstanding, a written notice specifying such default and requiring the Company
to cause such indebtedness to be discharged or cause such acceleration to be
rescinded or annulled and stating that such notice is a "Notice of Default"
hereunder (unless such default has been cured or waived); or

                  (g)   the Company or any Significant Subsidiary pursuant to or
within the meaning of any Bankruptcy Law:

                        (i)   commences a voluntary case,

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

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

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

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

                        (i)   is for relief against the Company or any
Significant Subsidiary in an involuntary case,

                        (ii)  appoints a Custodian of the Company or any
Significant Subsidiary or for all or substantially all of the property of any of
them, or

                        (iii) orders the winding up or liquidation of the
Company or any Significant Subsidiary,

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

           As used in this Section 5.01, the term "Bankruptcy Law" means title
11, U.S. Code or any similar Federal or State law for the relief of debtors and
the term "Custodian" means any receiver, trustee, assignee, liquidator or other
similar official under any Bankruptcy Law.

     Section 5.02 Acceleration of Maturity; Rescission and Annulment. If an
Event of Default with respect to Securities at the time Outstanding occurs and
is continuing, then and in

                                      -24-
<PAGE>

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 shall become immediately due and payable. If an Event
of Default specified in Section 5.01(g) or 5.01(h) occurs, the principal of, and
accrued interest on, all the Securities shall automatically, and without any
declaration or other action on the part of the Trustee or any Holder, become
immediately due and payable.

     At any time after such a declaration of acceleration with respect to
Securities 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
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:

               (i)   all overdue installments of interest on all Outstanding
Securities,

               (ii)  the principal of (and premium, if any, on) any Outstanding
Securities which have become due otherwise than by such declaration of
acceleration and interest thereon at the rate or rates borne by or provided for
in such Securities,

               (iii) to the extent that payment of such interest is lawful,
interest upon overdue installments of interest at the rate or rates borne by or
provided for in such Securities, and

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

          (b)  all Events of Default with respect to Securities, other than the
nonpayment of the principal of (or premium, if any) or interest on Securities
which have become due solely by such declaration of acceleration, have been
cured or waived as provided in Section 5.13.

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

     Section 5.03 Collection of Indebtedness and Suits for Enforcement by
Trustee. The Company covenants that if:

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

                                      -25-
<PAGE>

          (b)  default is made in the payment of the principal of (or premium,
if any, on) any Security at its Maturity, then the Company will, upon demand of
the Trustee, pay to the Trustee, for the benefit of the Holders of such
Securities, the whole amount then due and payable on such Securities for
principal (and premium, if any) and interest, with interest upon any overdue
principal (and premium, if any) and, to the extent that payment of such interest
shall be legally enforceable, upon any overdue installments of interest, if any,
at the rate or rates borne by or provided for in such Securities, and, in
addition thereto, such further amount as shall be sufficient to cover the costs
and expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

     If 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, and may
prosecute such proceeding to judgment or final decree, and may enforce the same
against the Company or any other obligor upon such 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 such Securities, wherever
situated.

     If an Event of Default with respect to Securities 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 effectual to protect and enforce any such rights,
whether for the specific enforcement of any covenant or agreement in this
Indenture or in aid of the exercise of any power granted herein, or to enforce
any other proper remedy.

     Section 5.04 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 relative to
the Company or any other obligor upon the Securities or the property of the
Company or of such other obligor or their creditors, the Trustee (irrespective
of whether the principal of the Securities shall then be due and payable as
therein expressed or by declaration or otherwise and irrespective of whether the
Trustee shall have made any demand on the Company for the payment of overdue
principal, premium, if any, 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, or such lesser
amount as may be provided for in the Securities, of principal (and premium, if
any) and interest, owing and unpaid in respect of the Securities and to file
such other papers or documents as may be necessary or advisable in order to have
the claims of the Trustee (including any claim for the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel) and
of the Holders allowed in such judicial proceeding, and

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

                                      -26-
<PAGE>

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

             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 the
Holders, vote for the election of a trustee in bankruptcy or similar official
and be a member of a creditors' or other similar committee.

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

     Section 5.06 Application of Money Collected. Any money collected by the
Trustee pursuant to this Article shall be applied in the following order, at the
date or dates fixed by the Trustee and, in case of the distribution of such
money on account of principal (or premium, if any) or interest, upon
presentation of the Securities, or both, as the case may be, 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 and any
predecessor Trustee under Section 6.07;

             SECOND: To the holders of Senior Indebtedness to the extent
required by the provisions of Article 14.

             THIRD: To the payment of the amounts then due and unpaid upon the
Securities for principal (and premium, if any) and interest payable, 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 aggregate amounts
due and payable on such Securities for principal (and premium, if any) and,
interest, respectively; and

             FOURTH: To the payment of the remainder, if any, to the Company.

                                      -27-
<PAGE>

     Section 5.07 Limitation on Suits. No Holder of any Security shall have any
right to institute any proceeding, judicial or otherwise, with respect to this
Indenture, or for the appointment of a receiver or trustee, or for any other
remedy hereunder, unless:

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

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

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

     Section 5.08 Unconditional Right of Holders to Receive Principal, Premium,
If Any, and Interest. Notwithstanding any other provision in this Indenture, the
Holder of any Security shall have the right which is absolute and unconditional
to receive payment of the principal of, and premium, if any, including the
Redemption Prices and Make-Whole Payment upon redemption pursuant to Article 11,
and (subject to Sections 3.04 and 3.06) interest on such Security on the
respective due dates 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 the provisions of this Indenture
and to institute suit for the enforcement of any such payment and right to
convert, and such rights shall not be impaired without the consent of such
Holder.

     Section 5.09 Restoration of Rights and Remedies. If the Trustee or any
Holder 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, the Company, the Trustee and the
Holders of Securities shall, subject to any determination in such proceeding, be
restored severally and respectively to their former positions hereunder and
thereafter all rights

                                      -28-
<PAGE>

and remedies of the Trustee and the Holders shall continue as though no such
proceeding had been instituted.

     Section 5.10 Rights and Remedies Cumulative. Except as otherwise provided
with respect to the replacement or payment of mutilated, destroyed, lost or
stolen Securities in the last paragraph of Section 3.05, no right or remedy
herein conferred upon or reserved to the Trustee or to the Holders of Securities
is intended to be exclusive of any other right or remedy, and every right and
remedy shall, to the extent permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or otherwise. The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.

     Section 5.11 Delay or Omission Not Waiver. No delay or omission of the
Trustee or of any Holder of any 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 an acquiescence therein.
Every right and remedy given by this Article or by law to the Trustee or to the
Holders may be exercised from time to time, and as often as may be deemed
expedient, by the Trustee or by the Holders of Securities, as the case may be.

     Section 5.12 Control by Holders of Securities. The Holders of not less than
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 with respect to the Securities, provided that:

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

                  (b)  the Trustee may take any other action deemed proper by
the Trustee which is not inconsistent with such direction, and

                  (c)  the Trustee need not take any action which might involve
it in personal liability or be unduly prejudicial to the Holders of Securities
not joining therein.

     Section 5.13 Waiver of Past Defaults. The Holders of not less than a
majority in principal amount of the Outstanding Securities may on behalf of the
Holders of all the Securities waive any past default hereunder with respect to
such Securities and its consequences, except a default:

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

                  (b)  in respect of the conversion by the Company of any
Security into Common Stock,

                                      -29-
<PAGE>

                  (c)  in the payment of the Redemption Prices or Make-Whole
Payment pursuant to Article 11,

                  (d)  in the payment of the Repurchase Price pursuant to
Article 12, or

                  (e)  in respect of a covenant or provision hereof which under
Article 9 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 Event of Default or impair any right consequent thereon.

     Section 5.14 Waiver of Usury, Stay or Extension Laws. The Company covenants
(to the extent that it may lawfully do so) that it will not at any time insist
upon, or plead, or in any manner whatsoever claim or take the benefit or
advantage of, any usury, stay or extension law wherever enacted, now or at any
time hereafter in force, which may affect the covenants or the performance of
this Indenture; and the Company (to the extent that it may lawfully do so)
hereby expressly waives all benefit or advantage of any such law, and covenants
that it will not hinder, delay or impede the execution of any power herein
granted to the Trustee, but will suffer and permit the execution of every such
power as though no such law had been enacted.

     Section 5.15 Undertaking for Costs. 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 or omitted by it as Trustee, the filing by any
party litigant in such suit of any undertaking to pay the costs of such suit,
and that such court may in its discretion assess reasonable costs, including
reasonable attorneys' fees, 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 shall not apply 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 for the
enforcement of the payment of the principal of (or premium, if any) or interest
on any Security on or after the respective Stated Maturities expressed in such
Security (or, in the case of redemption or repurchase, on or after the
Redemption Date or the Repurchase Date, respectively), or the right to convert
any Security in accordance with Article 13.

                                      -30-
<PAGE>

                                  ARTICLE VI

                                  The Trustee


     Section 6.01 General. The duties and responsibilities of the Trustee shall
                  -------
be as provided by the TIA and as set forth herein. Notwithstanding the
foregoing, 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 the Trustee in its sole discretion shall believe that repayment of
such funds or adequate indemnity against such risk or liability is not
reasonably assured to it. Whether or not herein 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 Article 6.

     Section 6.02 Certain Rights of Trustee. Subject to TIA Sections 315(a)
through (d):

                  (a)  the Trustee may rely, and shall be protected in acting or
refraining from acting, upon any resolution, certificate, statement, instrument,
facsimile transmission, opinion, report, notice, request, direction, consent,
order, bond, debenture, note, other evidence of indebtedness or other paper or
document believed by it to be genuine and to have been signed, made or presented
by the proper person and may accept and rely upon the same as conclusive
evidence of the truth and accuracy of the statement and opinions contained
therein. The Trustee need not investigate any fact or matter stated in any such
document;

                  (b)  before the Trustee acts or refrains from acting, it may
require an Officers' Certificate or an Opinion of Counsel, which shall conform
to Section 1.02. The Trustee shall not be liable for any action it takes or
omits to take in good faith in reliance on such certificate or opinion;

                  (c)  the Trustee may consult with counsel and the written
advice of such counsel shall be full and complete authorization and protection
with respect to any action taken, suffered or omitted by it hereunder in good
faith and reliance thereon and may act through its attorneys and agents and
shall not be responsible for the misconduct or negligence of any attorney or
agent appointed with due care;

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

                  (e)  the Trustee shall not be liable for any action it takes
or omits to take in good faith that it believes to be authorized or within its
rights or powers or for any action it takes or omits to take in accordance with
the written direction of the holders of a majority in

                                      -31-
<PAGE>

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;

                  (f)  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;

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

                  (h)  the Trustee shall not be required to take notice or be
deemed to have notice of any default hereunder unless the Trustee be
specifically notified of such default in writing by the Company or any holder of
the Securities, and in the absence of such notice the Trustee may conclusively
assume that there is no default; provided that if the Trustee is acting as
Paying Agent, the Trustee shall be required to take and be deemed to have notice
of its failure to receive payments of interest or principal hereunder;

                  (i)  except for information provided by the Trustee concerning
the Trustee, the Trustee shall have no responsibility with respect to any
information in any offering memorandum or other disclosure material distributed
with respect to the Securities, and the Trustee shall have no responsibility for
compliance with securities laws in connection with the issuance and sale of the
Securities;

                  (j)  in the event the Trustee shall receive inconsistent or
conflicting requests and indemnity from two or more groups of holders of the
Securities, each representing at least 25% (but less than 50%) of the aggregate
principal amount of the Securities then outstanding, the Trustee will act in
accordance with instructions received by the holders of the greater percentage
thereof;

                  (k)  except as otherwise expressly provided by the provisions
of this Indenture, the Trustee shall not be obligated and may not be required to
give or furnish any notice, demand, report, request, reply, statement, advice or
opinion to the holder of any Security or to the Company or any other Person, and
the Trustee shall not incur any liability for its failure or refusal to give or
furnish the same unless obligated or required to do so by the express provisions
hereof; and

                  (l)  the Trustee shall not be required to give any bond or
surety with respect to the performance of its duties or the exercise of its
powers under this Indenture.

                                      -32-
<PAGE>

     Section 6.03 Individual Rights of Trustee. The Trustee, any Paying Agent,
Security Registrar or any other agent of the Company, in its individual or any
other capacity, may become the owner or pledgee of Securities and may otherwise
deal with the Company, its Subsidiaries or its Affiliates with the same rights
it would have if it were not the Trustee, Paying Agent, Security Registrar or
such other agent. Any registrar, co-registrar, paying agent, conversion agent or
authenticating agent may do the same with like rights. However, the Trustee is
subject to TIA Sections 310(b) and 311.

     Section 6.04 Trustee's Disclaimer. The Trustee (i) makes no representation
as to the validity or adequacy of this Indenture or the Securities, (ii) shall
not be accountable for the Company's use or application of the proceeds from the
Securities and (iii) shall not be responsible for any statement in the
Securities other than its certificate of authentication.

     Section 6.05 Notice of Default. If any Event of Default occurs and is
continuing and if the Trustee has actual knowledge of such Event of Default, the
Trustee shall mail to each holder in the manner and to the extent provided in
TIA Section 313(c) notice of the Event of Default within 90 days after it
occurs, unless such Event of Default has been cured or waived; provided,
however, that, except in the case of a default in the payment of the principal
of (or premium, if any) or interest on any Security, the Trustee shall be
protected in withholding such notice if and so long as Responsible Officers of
the Trustee in good faith determine that the withholding of such notice is in
the interests of the Holders of the Securities; and provided further that in the
case of any default or breach referred to in Section 5.01(e) with respect to the
Securities, no such notice to Holders shall be given until at least 90 days
after the occurrence thereof. For the purpose of this Section, the term
"default" means any event which is, or after notice or lapse of time or both
would become, an Event of Default with respect to the Securities.

     Section 6.06 Conflicting Interests of Trustee. If the Trustee has or shall
acquire a conflicting interest within the meaning of the TIA, the Trustee shall
either eliminate such interest or resign, to the extent and in the manner
provided by, and subject to the provisions of the TIA and this Indenture.

     Section 6.07 Compensation and Indemnity. The Company shall pay to the
Trustee such compensation as shall be agreed upon in writing for its services.
The compensation of the Trustee shall not be limited by any law on compensation
of a trustee of an express trust. The Company shall reimburse the Trustee upon
request for all reasonable out-of-pocket expenses and advances incurred or made
by the Trustee in accordance with this Indenture. Such expenses shall include
the reasonable compensation and expenses of the Trustee's agents and counsel.

              The Company shall indemnify and hold harmless the Trustee and its
directors, agents and employees (collectively the "Indemnitees") against any and
all losses, liabilities, obligations, damages, penalties, fines, judgments,
actions, suits, proceedings, reasonable costs and expenses (including reasonable
fees and disbursements of counsel) of any kind whatsoever which may be incurred
by or imposed on the Indemnitees or any of them arising out of or in connection
with the acceptance or administration of its duties under this Indenture;
provided, however, that the Company need not reimburse any expense or indemnify
against any loss,

                                      -33-
<PAGE>

obligation, damage, penalty, fine, judgment, action, suit, proceeding,
reasonable cost or expense (including reasonable fees and disbursements of
counsel) of any kind whatsoever which may be incurred by Indemnitees or any of
them which results from the negligence or willful misconduct of the Indemnitees
or any of them. The Trustee shall notify the Company promptly of any claim for
which it may seek indemnity. Failure by the Trustee to so notify the Company
shall not relieve the Company of its obligations hereunder, unless the Company
is materially prejudiced thereby. The Company shall defend the claim and the
Trustee shall cooperate in the defense. Unless otherwise set forth herein, the
Indemnitees of any of them may have separate counsel and the Company shall pay
the reasonable fees and expenses of such counsel. The Company need not pay for
any settlement made without its consent, which consent shall not be unreasonably
withheld. The provisions of this Section 6.07 shall survive the termination of
this Indenture and the resignation or removal of the Trustee for any reason.

     To secure the Company's payment obligations in this Section 6.07, the
Trustee shall have a lien prior to the Securities on all money or property held
or collected by the Trustee, in its capacity as Trustee, except money or
property held in trust to pay principal of, premium, if any, and interest on
particular Securities.

     If the Trustee incurs expenses or renders services after the occurrence of
an Event of Default specified in Section 5.01(g) or Section 5.01(h), the
expenses and the compensation for the services will be intended to constitute
expenses of administration under Title 11 of the United States Bankruptcy Code
or any applicable federal or state law for the relief of debtors.

  Section 6.08 Replacement of Trustee. A resignation or removal of the Trustee
and appointment of a successor Trustee shall become effective only upon the
successor Trustee's acceptance of appointment as provided in this Section 6.08.

     The Trustee may resign at any time by so notifying the Company in writing
at least thirty (30) days prior to the date of the proposed resignation. The
holders of a majority in principal amount of the Outstanding Securities may
remove the Trustee by so notifying the Trustee in writing and may appoint a
successor Trustee with the prior consent of the Company. The Company may remove
the Trustee if: (i) the Trustee is no longer eligible under Section 6.10; (ii)
the Trustee is adjudged a bankrupt or an insolvent; (iii) a receiver or other
public officer takes charge of the Trustee or its property; or (iv) the Trustee
becomes incapable of acting.

     If the Trustee resigns or is removed, or if a vacancy exists in the office
of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. Within one year after the successor Trustee takes office, the holders
of a majority in principal amount of the Outstanding Securities may appoint a
successor Trustee to replace the successor Trustee appointed by the Company. If
the successor Trustee does not deliver its written acceptance required by the
next succeeding paragraph of this Section 6.08 within thirty (30) days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
holders of a majority in principal amount of the Outstanding Securities may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

                                      -34-
<PAGE>

          A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Immediately after the
delivery of such written acceptance, subject to the lien provided in Section
6.07, (i) the retiring Trustee shall transfer all property held by it as Trustee
to the successor Trustee, (ii) the resignation or removal of the retiring
Trustee shall become effective and (iii) the successor Trustee shall have all
the rights, powers and duties of the Trustee under this Indenture. A successor
Trustee shall mail notice of its succession to each holder.

          If the Trustee is no longer eligible under Section 6.10, any holder
who satisfies the requirements of TIA Section 310(b) may petition any court of
competent jurisdiction for the removal of the Trustee and the appointment of a
successor Trustee.

          The Company shall give notice of any resignation and any removal of
the Trustee and each appointment of a successor Trustee to all holders. Each
notice shall include the name of the successor Trustee and the address of its
Corporate Trust Office.

          Notwithstanding replacement of the Trustee pursuant to this Section
6.08, the Company's obligation under Section 6.07 shall continue for the benefit
of the retiring Trustee.

     Section 6.09 Successor Trustee by Merger, Etc. If the Trustee consolidates
with, merges or converts into, or transfers all or substantially all of its
corporate trust business to, another corporation or national banking
association, the resulting, surviving or transferee corporation or national
banking association without any further act shall be the successor Trustee with
the same effect as if the successor Trustee had been named as the Trustee
herein.

     Section 6.10 Eligibility. This Indenture shall always have a Trustee who
satisfies the requirements of TIA Section 310(a)(1). The Trustee (or the bank
holding company to which the Trustee is a member) shall have a combined capital
and surplus of at least $25 million as set forth in its most recent published
annual report of condition.

     Section 6.11 Money Held in Trust. Subject to the provisions of Section
10.03 and Section 14.02, all monies received by the Trustee shall, until used or
applied as herein provided, be held in trust for the purposes for which they
were received. The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law and except for money held in trust under Article 4 of
this Indenture.

     Section 6.12 Withholding Taxes. The Trustee, as agent for the Company,
shall exclude and withhold from each payment of principal and interest and other
amounts due hereunder or under the Securities any and all withholding taxes
applicable thereto as required by law. The Trustee agrees to act as such
withholding agent and, in connection therewith, whenever any present or future
taxes or similar charges are required to be withheld with respect to any amounts
payable in respect of the Securities, to withhold such amounts and timely pay
the same to the appropriate authority in the name of and on behalf of the
holders of the Securities, that it will file any necessary withholding tax
returns or statements when due, and that, as promptly as possible

                                      -35-
<PAGE>

after the payment thereof, it will deliver to each holder of a Security
appropriate documentation showing the payment thereof, together with such
additional documentary evidence as such holders may reasonably request from time
to time.

     Section 6.13 Preferential Collection of Claims. 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 the claims against the Company (or any
such other obligor).

     Section 6.14 Trustee's Application for Instructions from the Company . Any
application by the Trustee for written instructions from the Company (other than
with regard to any action proposed to be taken or omitted to be taken by the
Trustee that affects the rights of the holders of the Securities or holders of
Senior Indebtedness under this Indenture, including, without limitation, under
Article 14 hereof) may, at the option of the Trustee, set forth in writing any
action proposed to be taken or omitted by the Trustee under this Indenture and
the date on and/or after which such action shall be taken or such omission shall
be effective. The Trustee shall not be liable for any action taken by, or
omission of, the Trustee in accordance with a proposal included in such
application on or after the date specified in such application (which date shall
not be less than ten (10) Business Days after the date any officer of the
Company actually receives such application, unless any such officer shall have
consented in writing to any earlier date) unless prior to taking any such action
(or the effective date in the case of an omission), the Trustee shall have
received written instructions in response to such application specifying the
action to be taken or omitted.

                                  ARTICLE VII

                Holders' Lists and Reports by Trustee and Company


     Section 7.01 Disclosure of Names and Addresses of Holders. 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 Paying Agent nor any
Security Registrar shall be held accountable by reason of the disclosure of any
information as to the names and addresses of the Holders of Securities in
accordance with TIA Section 312, regardless of the source from which such
information was derived, and that the Trustee shall not be held accountable by
reason of mailing any material pursuant to a request made under TIA Section
312(b).

     Section 7.02 Reports by Trustee. Within 60 days after May 15 of each year
commencing with the first May 15 after the first issuance of Securities pursuant
to this Indenture, the Trustee shall transmit by mail to all Holders of
Securities as provided in TIA Section 313(c) a brief report dated as of such May
15 if required by TIA Section 313(a). 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 any Securities are listed with the Commission and the
Company. The Company will notify the Trustee when any Securities are listed on
any stock exchange and of any delisting thereof.

                                      -36-
<PAGE>

     Section 7.03 Reports by Company. The Company will:

                  (a) file with the Trustee, within 15 days after the Company is
required to file the same with the Commission, copies of the annual reports and
of the information, documents and other reports (or copies of such portions of
any of the foregoing as the Commission may from time to time by rules and
regulations prescribe) which the Company may be required to file with the
Commission pursuant to Sections 13(a) or 13(b) or Section 15(d) of the
Securities Exchange Act of 1934; or, if the Company is not required to file
information, documents or reports pursuant to either of such Sections, then it
will file with the Trustee, in accordance with rules and regulations prescribed
from time to time by the Commission, such of the supplementary and periodic
information, documents and reports which may be required pursuant to Section 13
of the Securities Exchange Act of 1934 in respect of a security listed and
registered on a national securities exchange as may be prescribed from time to
time in such rules and regulations;

                  (b) file with the Trustee and the Commission, in accordance
with rules and regulations prescribed from time to time by the Commission, such
additional information, documents and reports with respect to compliance by the
Company with the conditions and covenants of this Indenture as may be required
from time to time by such rules and regulations; and

                  (c) file with the Trustee and the Commission, if applicable,
and transmit by mail to the Holders of Securities, within 30 days after the
filing thereof with the Trustee, in the manner and to the extent provided in TIA
Section 313(c), such summaries of any information, documents and reports
required to be filed by the Company pursuant to paragraphs (1) and (2) of this
Section as may be required by rules and regulations prescribed from time to time
by the Commission and other information as may be required pursuant to the TIA
at the time and in the manner provided pursuant to such Act.

     Section 7.04 Company to Furnish Trustee Names and Addresses of Holders. (a)
                  ---------------------------------------------------------
The Company will furnish or cause to be furnished to the Trustee:

                  (i) semi-annually, not later than 10 days after the Regular
Record Date for interest for the Securities, 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, or if there is no Regular Record Date for
interest for the Securities, semi-annually, upon such dates as are set forth in
the Board Resolution or indenture supplemental hereto; and

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

provided, however, that, so long as the Trustee is the Security Registrar, no
such list shall be required to be furnished.

                                      -37-
<PAGE>

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

                                  ARTICLE VIII

                Consolidation, Merger, Sale, Lease or Conveyance


     Section 8.01 Consolidations and Mergers of Company and Sales, Leases and
Conveyances Permitted Subject to Certain Conditions. The Company may consolidate
with, or sell, lease, transfer, convey or otherwise dispose of all or
substantially all of its assets to, or merge with or into any other Person,
provided that in any such case, (1) either the Company shall be the continuing
corporation, or the Person (if other than the Company) formed by such
consolidation or into which the Company is merged or the Person which acquires
or leases the Company's assets substantially as an entirety is a corporation,
partnership, limited liability company or trust organized and existing under the
laws of any United States jurisdiction and expressly assumes the due and
punctual payment of the principal of (and premium, if any) and any interest
payable pursuant to this Indenture on all of the Securities, according to their
tenor, and the due and punctual performance and observance of all of the
covenants and conditions of this Indenture to be performed by the Company and
shall have provided for conversion rights, if applicable, in accordance with the
provisions of Article 13 hereof, by supplemental indenture, complying with
Article 9 hereof, satisfactory to the Trustee, executed and delivered to the
Trustee by such corporation and (2) immediately after giving effect to such
transaction and treating any indebtedness which becomes an obligation of the
Company or such Person or any Subsidiary as a result thereof as having been
incurred by the Company or such Subsidiary at the time of such transaction, no
Event of Default, and no event which, after notice or the lapse of time, or
both, would become an Event of Default, shall have occurred and be continuing.

     Section 8.02 Rights and Duties of Successor Corporation. In case of any
such consolidation, merger, sale, lease or conveyance and upon any such
assumption by the successor Person, such successor Person shall succeed to and
be substituted for the Company, with the same effect as if it had been named
herein as the party of the first part, and the predecessor corporation, except
in the event of a lease, shall be relieved of any further obligation under this
Indenture and the Securities. Such successor Person thereupon may cause to be
signed, and may issue either in its own name or in the name of the Company, any
or all of the Securities issuable hereunder which theretofore shall not have
been signed by the Company and delivered to the Trustee; and, upon the order of
such successor corporation, instead of the Company, and subject to all the
terms, conditions and limitations in this Indenture prescribed, the Trustee
shall authenticate and shall deliver any Securities which previously shall have
been signed and delivered by the officers of the Company to the Trustee for
authentication, and any Securities which such successor Person thereafter shall
cause to be signed and delivered to the Trustee for that purpose. All the
Securities so issued shall in all respects have the same legal rank and benefit
under this Indenture as the Securities theretofore or thereafter issued in
accordance with the

                                      -38-
<PAGE>

terms of this Indenture as though all of such Securities had been issued at the
date of the execution hereof.

           In case of any such consolidation, merger, sale, lease or conveyance,
such changes in phraseology and form (but not in substance) may be made in the
Securities thereafter to be issued as may be appropriate.

     Section 8.03 Officers' Certificate and Opinion of Counsel. Any
consolidation, merger, sale, lease, transfer, conveyance or other dispositions
permitted under Section 8.01 is also subject to the condition that the Trustee
receive an Officers' Certificate and an Opinion of Counsel to the effect that
any such consolidation, merger, sale, lease, transfer or conveyance or other
dispositions and the assumption by any successor Person, complies with the
provisions of this Article and that all conditions precedent herein provided for
relating to such transaction have been complied with.


                                   ARTICLE IX

                             Supplemental Indentures


     Section 9.01 Supplemental Indentures Without Consent of Holders . Without
the consent of any Holders of Securities, the Company, when authorized by or
pursuant to a Board Resolution, and the Trustee, at any time and from time to
time, may enter into one or more indentures supplemental hereto, in form
satisfactory to the Trustee, for any of the following purposes:

                  (a) to evidence the succession of another Person to the
Company and the assumption by any such successor of the covenants of the Company
contained herein and the Securities issued hereunder;

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

                  (c) to add any additional Events of Default for the benefit of
the Holders of the Securities; provided, however, that in respect of any such
additional Events of Default such supplemental indenture may provide for a
particular period of grace after default (which period may be shorter or longer
than that allowed in the case of other defaults) or may provide for an immediate
enforcement upon such default or may limit the remedies available to the Trustee
upon such default or may limit the right of the Holders of a majority in
aggregate principal amount of those Securities to which such additional Events
of Default apply to waive such default;

                  (d) to evidence and provide for the acceptance of appointment
hereunder by a successor Trustee with respect to the Securities and to add to or
change any of the

                                      -39-
<PAGE>

provisions of this Indenture as shall be necessary to provide for or facilitate
the administration of the trusts hereunder by more than one Trustee;

                  (e) to cure any ambiguity, to correct or supplement any
provision herein which may be defective or inconsistent with any other provision
herein; provided such provisions shall not adversely affect the interests of the
Holders of Securities in any material respect;

                  (f) to make any change that does not adversely affect the
rights of any holder of Securities;

                  (g) to make any change to comply with any requirement of the
Commission in connection with the qualification of the Indenture under TIA; or

                  (h) to provide for the issuance of uncertificated Securities
in addition to or in place of certificated Securities; provided, however, that
the uncertificated Securities are issued in registered form for purposes of
Section 163(f) of the Code or in a manner such that the uncertificated
Securities are described in Section 163(f)(2)(B) of the Code.

     Section 9.02 Supplemental Indentures with Consent of Holders. With the
consent of the Holders of not less than a majority in principal amount of all
Outstanding Securities affected by such supplemental indenture, by Act of said
Holders delivered to the Company and the Trustee, the Company, when authorized
by or pursuant to 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 of the Holder of each Outstanding Security
affected thereby:

                  (a) reduce the principal amount, Repurchase Price or
Redemption Price with respect to any Security, or extend the Stated Maturity of
any Security or alter the manner of payment or rate of interest on any Security
or make any Security payable in money or securities other than that stated in
the Security;

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

                  (c) make any change that adversely affects the right to
convert any Security;

                  (d) modify the provisions of the Indenture relating to the
ranking of the Securities in a manner adverse to the Holders of the Securities;
or

                                      -40-
<PAGE>

                  (e) impair the right to institute suit for the enforcement of
any payment with respect to, or conversion of, the Securities.

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

     Section 9.03 Execution of Supplemental Indentures. In executing, or
accepting the additional trusts created by, any supplemental indenture permitted
by this Article or the modification thereby of the trusts created by this
Indenture, the Trustee shall be entitled to receive, and (subject to Article 6)
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. The Trustee may, but shall not be obligated to, enter into any such
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

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

     Section 9.05 Conformity with Trust Indenture Act. Every supplemental
indenture executed pursuant to this Article shall conform to the requirements of
the Trust Indenture Act as then in effect.

     Section 9.06 Reference in Securities to Supplemental Indentures .
Securities authenticated and delivered after the execution of any supplemental
indenture pursuant to this Article may, and shall, if required by the Trustee,
bear a notation 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 Trustee and the Company, to any
such supplemental indenture may be prepared and executed by the Company and
authenticated and delivered by the Trustee in exchange for Outstanding
Securities.

                                    ARTICLE X

                                    Covenants


     Section 10.01 Payment of Principal, Premium, If Any, and Interest. The
Company covenants and agrees for the benefit of the Holders of Securities that
it will duly and punctually pay the principal of (and premium, if any), interest
on, and the Repurchase Price, the Redemption Price and the Make-Whole Payment
with respect to the Securities in accordance with the terms of the Securities
and this Indenture. At the option of the Company, all payments of principal may
be paid by check to the registered Holder of the Security or other person

                                      -41-
<PAGE>

entitled thereto against surrender of such Security. The conversion of
any Securities pursuant to Article 13 hereof, together with any cash payments
required to be made in accordance with the terms of the Securities and this
Indenture, will satisfy the Company's obligations under this Section 10.01 with
respect to such Securities.

     Section 10.02 Maintenance of Office or Agency. The Company shall maintain a
Place of Payment for the Securities an office or agency where the Securities may
be presented or surrendered for payment or conversion or redemption, where the
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 will give prompt written notice to the
Trustee of the location, and any change in the location, of each such office or
agency. If at any time the Company shall fail to maintain any such required
office or agency or shall fail to furnish the Trustee with the address thereof,
such presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee, and the Company hereby appoints the
Trustee its agent to receive all such presentations, surrenders, notices and
demands.

          The Company may from time to time designate one or more other offices
or agencies where the Securities may be presented or surrendered for any or all
of such purposes, and may from time to time rescind such designations; provided,
however, that no such designation or rescission shall in any manner relieve the
Company of its obligation to maintain an office or agency in accordance with the
requirements set forth above for such purposes. The Company will give prompt
written notice to the Trustee of any such designation or rescission and of any
change in the location of any such other office or agency. The Company hereby
designates as a Place of Payment of the Securities the office or agency of the
Company in the Borough of Manhattan, The City of New York, and initially
appoints the Trustee c/o The Chase Manhattan Bank, 55 Water Street, 2nd Floor,
New York, NY 10041, Attention: Securities Window, as Paying Agent in such city
and as its agent to receive all such presentations, surrenders, notice and
demands.

     Section 10.03 Money for Securities Payments to Be Held in Trust. If the
Company shall at any time act as its own Paying Agent with respect to any
Securities, it will, on or before each due date of the principal of (and
premium, if any), or interest on the Securities, segregate and hold in trust for
the benefit of the Persons entitled thereto a sum sufficient to pay the
principal (and premium, if any) or interest so becoming due until such sums
shall be paid to such Persons or otherwise disposed of as herein provided, and
will promptly notify the Trustee of its action or failure so to act.

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

                                      -42-
<PAGE>

          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, that
such Paying Agent will:

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

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

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

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

          Except as otherwise provided in the Securities, any money deposited
with the Trustee or any Paying Agent, or then held by the Company, in trust for
the payment of the principal of (and premium, if any) or interest on any
Security and remaining unclaimed for two years after such principal (and
premium, if any) or interest has become due and payable shall be paid to the
Company upon Company Request or (if then held by the Company) shall be
discharged from such trust; and the Holder of such Security shall thereafter, as
an unsecured general creditor, look only to the Company for payment of such
principal of (and premium, if any) or interest on any Security, without interest
thereon, and all liability of the Trustee or such Paying Agent with respect to
such trust money, and all liability of the Company as trustee thereof, shall
thereupon cease; provided, however, that the Trustee or such Paying Agent,
before being required to make any such repayment, may at the expense of the
Company cause to be published once, in an Authorized Newspaper, notice that such
money remains unclaimed and that, after a date specified therein, which shall
not be less than 30 days from the date of such publication, any unclaimed
balance of such money then remaining, will be repaid to the Company.

     Section 10.04 Existence. Subject to Article 8, the Company will do or cause
to be done all things necessary to preserve and keep in full force and effect
its corporate existence, rights (charter and statutory) and franchises, except
to the extent that the Board of Directors shall determine that the failure to do
so would not have a material adverse effect on the business, assets, financial
condition or results of operation of the Company (a "Material Adverse

                                      -43-
<PAGE>

Effect"); provided, however, that the Company shall not be required to preserve
any right or franchise if the Board of Directors shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and that the loss thereof is not disadvantageous in any material
respect to the Holders.

     Section 10.05 Payment of Taxes and Other Claims. The Company will pay or
discharge or cause to be paid or discharged, before the same shall become
delinquent, (1) all taxes, assessments and governmental charges levied or
imposed upon it or any Subsidiary or upon the income, profits or property of the
Company or any Subsidiary, and (2) all lawful claims for labor, materials and
supplies which, if unpaid, might by law become a lien upon the property of the
Company or any Subsidiary and have a Material Adverse Effect; provided, however,
that the Company shall not be required to pay or discharge or cause to be paid
or discharged any such tax, assessment, charge or claim whose amount,
applicability or validity is being contested in good faith by appropriate
proceedings.

     Section 10.06 Statement as to Compliance. The Company will deliver to the
Trustee, within 120 days after the end of each fiscal year of the Company, a
certificate from the principal executive officer, principal financial officer or
principal accounting officer as to his or her knowledge of the Company's
compliance with all terms, conditions and provisions under this Indenture and,
in the event of any noncompliance, specifying such noncompliance and the nature
and status thereof. For purposes of this Section 10.06, such compliance shall be
determined without regard to any period of grace or requirement of notice under
this Indenture.

     Section 10.07 Waiver of Certain Covenants. The Company may omit in any
particular instance to comply with any term, provision or condition set forth in
Sections 10.04 to 10.05, inclusive, if before the time for such compliance the
Holders of at least a majority in principal amount of all outstanding
Securities, by Act of such Holders, either waive such compliance in such
instance or generally waive compliance with such covenant or condition, but no
such waiver shall extend to or affect such covenant or condition except to the
extent so expressly waived, and, until such waiver shall become effective, the
obligations of the Company and the duties of the Trustee in respect of any such
term, provision or condition shall remain in full force and effect.

                                   ARTICLE XI

                            Redemption of Securities.


     Section 11.01 Provisional and Optional Redemption by the Company. (a) The
Securities may be redeemed at the election of the Company, as a whole or from
time to time in part, at any time prior to December 21, 2002 (a "Provisional
Redemption"), upon notice as set forth in Section 11.04, at a redemption price
equal to $1,000 per $1,000 principal amount of the Securities redeemed plus
accrued and unpaid interest, if any, to but excluding the date of redemption
(the "Provisional Redemption Date") if the Closing Price of the Common Stock has
exceeded 150% of the conversion price (as defined in Article 13) then in effect
for at least 20

                                      -44-
<PAGE>

Trading Days in any consecutive 30-Trading Day period ending on the Trading Day
prior to the date of mailing of the provisional notice of redemption pursuant to
Section 11.04 (the "Notice Date").

     Upon any such Provisional Redemption, the Company shall make an additional
payment in cash (the "Make-Whole Payment") with respect to the Securities called
for redemption to holders on the Notice Date in an amount equal to $152.54 per
$1,000 principal amount of the Securities, less the amount of any interest
actually paid on such Securities prior to the Notice Date. The Company shall
make the Make-Whole Payment on all Securities called for Provisional Redemption,
including those Securities converted into Common Stock between the Notice Date
and the Provisional Redemption Date.

          (b)  The Securities may be redeemed at the election of the Company, as
a whole or from time to time in part, at any time on or after December 21, 2002,
and prior to maturity (an "Optional Redemption"), upon notice as set forth in
Section 11.04, at the following optional redemption prices (expressed as
percentages of the principal amount), together in each case with accrued and
unpaid interest, if any, up to but not including the date fixed for redemption.

     The table below shows Redemption Prices with respect to $1,000 principal
amount of the Securities if redeemed during the twelve-month periods described
below:

Period                                                        Redemption Price
------                                                        ----------------

December 21, 2002 through December 20, 2003                         102.2%

Thereafter                                                          101.1%.

     Section 11.02 Election to Redeem; Notice to Trustee. The election of the
Company to redeem any Securities shall be evidenced by or pursuant to a Board
Resolution. In case of any redemption at the election of the Company of all or
any part of the Securities pursuant to Section 11.01 (Provisional Redemption or
Optional Redemption), the Company shall, at least 45 days prior to the giving of
the notice of redemption in Section 11.04 (unless a shorter notice shall be
satisfactory to the Trustee), notify the Trustee of the Redemption Date and of
the principal amount of Securities to be redeemed. In the case of any redemption
of Securities prior to the expiration of any restriction on such redemption
provided in the terms of such Securities or elsewhere in this Indenture, the
Company shall furnish the Trustee with an Officers' Certificate evidencing
compliance with such restriction.

     Section 11.03 Selection by Trustee of Securities to Be Redeemed. If less
than all the Securities are to be redeemed, the particular Securities to be
redeemed shall be selected not more than 60 days prior to the Redemption Date by
the Trustee, from the Outstanding Securities not previously called for
redemption, by such method as the Trustee shall deem fair and appropriate.

                                      -45-
<PAGE>

     If any Security selected for partial redemption is converted in part before
termination of the conversion right with respect to the portion of the Security
so selected, the converted portion of such Security shall be deemed, solely for
purposes of determining the aggregate principal amount of the Securities to be
redeemed, to be the portion selected for redemption (provided, however, that the
Holder of such Security so converted and deemed redeemed shall not be entitled
to any additional interest payment as a result of such deemed redemption than
such Holder would have otherwise been entitled to receive upon conversion of
such Security). Securities which 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.

     Securities in denominations of $1,000 may only be redeemed in whole. The
Trustee may select for redemption portions (equal to $1,000 or any multiple
thereof) of the principal of Securities that have denominations larger than
$1,000. Provisions of this Indenture that apply to Securities called for
redemption also apply to portions of Securities called for redemption.

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

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

     Section 11.04 Notice of Redemption. Notice of redemption shall be given in
the manner provided in Section 1.06, not less than 30 days nor more than 60 days
prior to the Redemption Date to each Holder of Securities to be redeemed, but
failure to give such notice in the manner herein provided to the Holder of any
Security designated for redemption as a whole or in part, or any defect in the
notice to any such Holder, shall not affect the validity of the proceedings for
the redemption of any other such Security or portion thereof.

     Any notice that is mailed to the Holders of Securities in the manner herein
provided shall be conclusively presumed to have been duly given, whether or not
the Holder receives the notice.

All notices of redemption shall state:

          (a) the Redemption Date;

          (b) the Redemption Price, accrued interest to the Redemption Date
payable as provided in Section 11.06, if any, and, with respect to Securities
called for Provisional Redemption, the Make-Whole Payment;

                                      -46-
<PAGE>

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

          (d) in case any Security is to be redeemed in part only, the notice
which relates to such Security shall state that on and after the Redemption
Date, upon surrender of such Security, the holder will receive, without a
charge, a new Security or Securities of authorized denominations for the
principal amount thereof remaining unredeemed;

          (e) that on the Redemption Date, the Redemption Price and accrued
interest to the Redemption Date payable as provided in Section 11.06, if any,
and, with respect to Securities called for Provisional Redemption, the Make-
Whole Payment, will become due and payable upon each such Security, or the
portion thereof, to be redeemed and, if applicable, that interest thereon shall
cease to accrue on and after said date;

          (f) the Place or Places of Payment where such Securities, maturing
after the Redemption Date, are to be surrendered for payment of the Redemption
Price and accrued interest, if any, and, with respect to Securities called for
Provisional Redemption, the Make-Whole Payment, or for conversion,

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

          (h) the then current Conversion Price;

          (i) that the Securities called for redemption may be converted at any
time before the close of business on the Redemption Date;

          (j) the CUSIP number of such Security, if any; and

          (k) that a Holder of Securities who desires to convert Securities must
satisfy the requirements for conversion contained in such Securities.

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

     Section 11.05 Deposit of Redemption Price. Not later than 11:00 a.m. New
York City time on the Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 10.03) an amount of
money sufficient to pay on the Redemption Date, the Redemption Price of, and
(except if the Redemption Date shall be an Interest Payment Date) accrued
interest on, and, with respect to the Securities called for Provisional
Redemption, the Make-Whole Payment on, all the Securities or portions thereof
which are to be redeemed on that date, other than Securities or portions thereof
called for redemption on that date which have been delivered by the Company to
the Trustee for cancellation or have been converted; provided that,

                                      -47-
<PAGE>

with respect to a Provisional Redemption, any money so deposited for payment of
the Make-Whole Payment shall remain segregated and held in trust for payment of
the Make-Whole Payment which shall be made on all Securities called for
Provisional Redemption, including Securities converted into shares of Common
Stock after the Notice Date and prior to the Provisional Redemption Date.

     Section 11.06 Securities Payable on Redemption Date. Notice of redemption
having been given as aforesaid, the Securities so to be redeemed shall, on the
Redemption Date, become due and payable at the Redemption Price therein
specified (together with accrued interest, if any, to the Redemption Date), and
from and after such date (unless the Company shall default in the payment of the
Redemption Price and accrued interest) such Securities shall, if the same were
interest-bearing, cease to bear interest. Upon surrender of any such Security
for redemption in accordance with said notice, such Security shall be paid by
the Company at the Redemption Price, together with accrued interest, if any, to
the Redemption Date and with respect to Securities called for Provisional
Redemption (including Securities converted into Common Stock pursuant to the
terms hereof after the Notice Date and prior to the Provisional Redemption
Date), the Make-Whole Payment; and provided, however, that if the Provisional
Redemption Date is an Interest Payment Date, the semi-annual payment of interest
becoming due on such date shall be payable to the Holders of such Securities
registered as such on the relevant Regular Record Date according to their terms
and the provisions of Section 3.06, and with respect to a Provisional
Redemption, the holder of any Securities converted into Common Stock pursuant to
the terms hereof after the Notice Date and prior to the Provisional Redemption
Date shall have the right to the Make-Whole Payment regardless of the conversion
of such Securities.

         If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal and premium, if any (including
the Make-Whole Payment, if any), shall, until paid, bear interest from the
Redemption Date at the rate borne by the Security and such Security shall remain
convertible into Common Stock until the principal and premium, if any (including
the Make-Whole Payment, if any), shall have been paid.

     Section 11.07 Securities Redeemed in Part. Any Security which is to be
redeemed only in part (pursuant to the provisions of this Article) shall be
surrendered at a Place of Payment therefor (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 deliver to the Holder of such Security
without service charge a new Security or Securities, of any authorized
denomination as requested by such Holder in aggregate principal amount equal to
and in exchange for the unredeemed portion of the principal of the Security so
surrendered.

                                      -48-
<PAGE>

                                  ARTICLE XII

             Repurchase at Option of Holders upon Change in Control


     Section 12.01 Right to Require Repurchase. In the event that a Change in
Control shall occur, each Holder shall have the right, at the Holder's option,
to require the Company to repurchase (subject to the provisions of Section 14.03
hereof), and upon the exercise of such right the Company shall repurchase, all
of such Holder's Securities, or any portion of the principal amount thereof that
is an integral multiple of $1,000 (provided that no single Security may be
repurchased in part unless the portion of the principal amount of such Security
to be outstanding after such repurchase is equal to $1,000 or an integral
multiple of $1,000), on the date (the "Repurchase Date") that is not later than
45 Business Days after the date of the occurrence of a Change in Control at a
purchase price equal to 100% of the principal amount plus interest accrued and
unpaid to the Repurchase Date (subject to the right of Holders of record on the
Regular Record Date to receive interest on the relevant Interest Payment Date)
(the "Repurchase Price"). 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 in Section 12.02, by delivery of shares of Common Stock having a fair
market value equal to the Repurchase Price as described in Section 12.02. If the
Repurchase Date is between a Regular Record Date and the related Interest
Payment Date, then the interest payable on such Interest Payment Date shall be
paid to the Holder of record of the Security on such Regular Record Date.

     Section 12.02 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 12.01 if and only if the following
conditions have been satisfied:

                   (a)  The shares of Common Stock deliverable in payment of the
repurchase Price shall have a fair market value as of the Repurchase Date of not
less than the Repurchase Price. For purposes of this Section 12.02, the fair
market value of shares of Common Stock shall be determined by the Company and
shall be equal to 95% of the average of the Closing Prices of the Common Stock
for the five consecutive Trading Days ending on and including the third Trading
Day immediately preceding the Repurchase Dates;

                   (b)  The shares of Common Stock deliverable in payment of the
Repurchase Price shall be listed for trading on a U.S. national securities
exchange or approved for trading on an established automated over-the-counter
trading market in the United States, in either case, immediately prior to the
repurchase date; and

                   (c)  All shares of Common Stock deliverable in payment of the
Repurchase Price shall be issued out of the Company's authorized but unissued
Common Stock

                                      -49-
<PAGE>

and will, 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 12.02 are not
satisfied in accordance with the terms thereof, the Repurchase Price shall be
paid by the Company only in cash.

     Section 12.03 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 15th day after the occurrence of a
Change in Control, the Company or, at the written request of the Company, on or
before the tenth (10th) day after receipt of such request, the Trustee, at the
Company's expense, shall give notice to all Holders of the Securities (the
"Company Notice") of the occurrence of the Change in Control and of the
repurchase right set forth herein arising as a result thereof. If the Company
gives such notice of a repurchase right, the Company shall also deliver a copy
of such notice of a repurchase right to the Trustee.

Each Company Notice shall state:

          (i)     the date of such Change in Control and, briefly, the events
causing such Change in Control;

          (ii)    the date by which the Change in Control Purchase Notice (as
defined below) must be delivered;

          (iii)   the Repurchase Date;

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

          (v)     a description of the procedure which a Holder must follow to
exercise a repurchase right;

          (vi)    the procedures for withdrawing a Change in Control Purchase
Notice;

          (vii)   the place or places where such Securities are to be
surrendered for payment of the Repurchase Price and accrued interest, if any;

          (viii)  briefly, the conversion rights of Holders of Securities;

          (ix)    the conversion price and any adjustments thereto, the date on
which the right to convert the Securities will terminate and the places where
such Securities may be surrendered for conversion;

          (x)     that Holders who want to convert Securities must satisfy the
requirements set forth in the Securities; and

                                      -50-
<PAGE>

                 (xi)    that no failure of the Company to give the foregoing
     notice 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 the Securities.

             (b) To exercise a repurchase right, a Holder shall deliver to the
Paying Agent or an office or agency maintained by the Company for such purpose
in the Borough of Manhattan, The City of New York, prior to the close of
business on or before the Repurchase Date written notice of the Holder's
exercise of such right (the "Change in Control Purchase Notice"), which notice
shall set forth (i) the name of the Holder, the principal amount of the
Securities to be repurchased (and, if any Security is to be repurchased in part,
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 pursuant to the applicable provisions of
the Securities, 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 (ii)
the certificate numbers of the Securities with respect to which the repurchase
right is being exercised.

             (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 Paying Agent 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 issued, with respect to the Securities (or portion
thereof) as to which the repurchase right has been exercised; provided, however,
that such Security for which a repurchase right has been exercised has been
delivered to the Paying Agent at any time after the notice of exercise of a
repurchase right shall have been given. Payment of the Repurchase Price for such
Security or, if shares of Common Stock are to be issued, shall be made promptly
following the later of the Business Day following the Repurchase Date and time
of delivery of the Security. If the Paying Agent holds money sufficient to pay
the Repurchase Price on the Business Day following the Repurchase Date, then,
immediately after the Repurchase Date, such Security shall cease to be
outstanding and interest will cease to accrue and will be deemed paid regardless
of whether such Security has been delivered to the Paying Agent, and all other
rights of the Holder shall terminate (other than the right of such Holder to
receive the Repurchase Price upon delivery of such Security).

             (d) On or prior to the Repurchase Date, the Company shall deposit
with the Trustee or with a Paying Agent (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 10.03 of the
Indenture) an amount of money sufficient to pay the Repurchase Price of the
Securities which are to be repaid on the Repurchase Date.

             (e) If any Security (or portion thereof) surrendered for repurchase
shall not be so paid on the Business Day following the Repurchase Date, the
principal amount of such Security (or portion thereof, as the case may be)
shall, until paid, bear interest from the Repurchase Date at the rate of 5 1/2%
per annum, and each Security shall remain convertible into

                                      -51-
<PAGE>

Common Stock in accordance with Article 13 herein until the principal of such
Security (or portion thereof, as the case may be) shall have been paid or duly
provided for.

             (f) Any Security which 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 deliver 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 portion of the principal of the Security so surrendered that
was not repurchased.

             (g) Any Holder that has delivered to the Trustee a Change in
Control Purchase Notice shall have the right to withdraw such notice at any time
prior to the close of business on the Repurchase Date by delivery of a written
notice of withdrawal to the Paying Agent prior to the close of business on such
date. The notice of withdrawal shall state the principal amount and the
certificate numbers of the Securities as to which the withdrawal notice relates
and the principal amount, if any, which remains subject to the notice of
exercise of a repurchase right. A Security in respect of which a Holder has
exercised its option to require repurchase upon a Change in Control may
thereafter be converted into Common Stock only if such Holder withdraws its
notice in accordance with the preceding sentence.

             (h) 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.

             (i) No fractional shares of Common Stock or scrip representing
fractional shares shall be issued upon repurchase of Securities. If more than
one Security shall be repurchased from the same holder and the Repurchase Price
shall be payable in shares of Common Stock, the number of full shares which
shall be issued upon repurchase shall be computed on the basis of the aggregate
principal amount of the Securities (or specified portions thereof to the extent
permitted hereby) so repurchased. If any fractional share of stock otherwise
would be issuable upon repurchase of any Security or Securities, the Company
shall make an adjustment therefor in cash at the current market value thereof to
the Holder of Securities. For

                                      -52-
<PAGE>

these purposes, the current market value of a share of Common Stock shall be the
Closing Price on the first Trading Day immediately preceding the Repurchase
Date.

             (j) The issue of stock certificates on repurchase of Securities
shall be made without charge to the Holder of Securities being repurchased for
any tax in respect of the issue thereof. The Company shall not, however, be
required to pay any tax which may be payable in respect of any transfer involved
in the issue and delivery of stock in any name other than that of the Holder of
any Security repurchased, and the Company shall not be required to issue or
deliver any such stock certificate unless and until the person or persons
requesting the issue thereof shall have paid to the Company the amount of such
tax or shall have established to the satisfaction of the Company that such tax
has been paid.

     Section 12.04. Certain Definitions. For purposes of this Article 12:

             (a) the terms "beneficial owner" and "beneficial ownership" shall
be determined in accordance with Rules 13d-3 and 13d-5 promulgated by the
Commission pursuant to the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), except that a Person shall be deemed to have "beneficial
ownership" of all securities that such Person has the right to acquire, whether
such right is exercisable immediately or only after the passage of time; and

             (b) the term "person" shall include any syndicate or group which
would be deemed to be a "Person" under Section 13(d)(3) of the Exchange Act.

     Section 12.05. Change in Control. A "Change in Control" shall be deemed to
have occurred at such time after the original issuance of the Securities as:

             (a) any "person" or "group" (as such terms are used in Sections
13(d) and 14(d) of the Exchange Act), acquires the beneficial ownership,
directly or indirectly, through a purchase, merger or other acquisition
transaction, of more than 50% of the Company's total outstanding voting stock
other than an acquisition by the Company, any of its Subsidiaries or any of its
employee benefit plans.

             (b) the Company shall consolidate with, or merge with or into
another Person or convey, transfer, lease or otherwise dispose of all or
substantially all of its assets to any Person, or any Person consolidates with
or merges with or into the Company, in any event pursuant to a transaction in
which the Company's outstanding voting stock is converted into or exchanged for
cash, securities or other property, other than any such transactions where:

                 (i)     the Company's voting stock is not converted or
     exchanged at all (except to the extent necessary to reflect a change in the
     Company's jurisdiction of incorporation) or is converted into or exchanged
     for voting stock (other than Redeemable Capital Stock) of the surviving or
     transferee corporation, and

                 (ii)    immediately after such transaction, no "person" or
     "group" (as such terms are used in Sections 13(d) and 14(d) of the Exchange
     Act) is the "beneficial

                                      -53-
<PAGE>

owner", directly or indirectly, of more than 50% of the total outstanding voting
stock of the surviving or transferee corporation;

             (c) during any consecutive two-year period, individuals who at the
beginning of such period constituted the Board of Directors (together with any
new directors whose election to such Board of Directors, or whose nomination for
election by the Company's stockholders, was approved by a vote of a majority of
the directors then still in office who were either directors at the beginning of
such period of whose election or nomination for election was previously so
approved) cease for any reason to constitute a majority of the Board of
Directors then in office;

             (d) a special resolution is passed by the Company's stockholders
approving the plan of liquidation or dissolution other than in a transaction
which complies with the provisions described in Article 8 of the Indenture.

        "Redeemable Capital Stock" means any class of series of capital stock
that, either by its terms, by the terms of any security into which it is
convertible or exchangeable or by contract or otherwise, is, or upon the
happening of an event or passage of time would be, required to be redeemed prior
to the final stated maturity of the Securities or is redeemable at the option of
the holder thereof at any time prior to such final stated maturity, or is
convertible into or exchangeable for debt securities at any time prior to such
final stated maturity; provided, however, that Redeemable Capital Stock shall
not include any common stock the holder of which has the right to put to the
Company upon certain terminations of employment.

     Section 12.06. References to Repurchase Price. Whenever in this Indenture
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 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 this
Article 12, such reference shall be deemed to include reference to the
Repurchase Price only if the Repurchase Price is payable in cash.

                                  ARTICLE XIII

                                   Conversion


     Section 13.01. Conversion Privilege and Conversion Price. Subject to and
upon compliance with the provisions of this Article 13, at the option of the
Holder thereof, any Security or any portion of the principal amount thereof
which is $1,000 or an integral multiple of $1,000 may be converted at the
principal amount thereof, or of such portion thereof, into fully paid and
nonassessable shares of Common Stock of the Company (the "Conversion Shares") at
any time following the date of original issuance of Securities at the conversion
price, determined

                                      -54-
<PAGE>

as hereinafter provided, in effect at the time of conversion. Such conversion
right shall expire at the close of business on December 21, 2004, subject to any
rules and procedures of the depositary for such security in effect from time to
time (the "Applicable Procedures"). In case a Security or portion thereof has
previously been called for redemption at the election of the Company, such
conversion right in respect of the Security or portion so called shall expire at
the close of business, New York City time, on the Redemption Date, unless the
Company defaults in making the payment due upon redemption (in each case subject
as aforesaid to any Applicable Procedures). A Security in respect of which a
Holder has delivered a Change in Control Purchase Notice (as defined in Article
12 hereof) exercising the option of such Holder to require the Company to
purchase such Security may be converted only if such notice is withdrawn by a
written notice of withdrawal delivered by the Holder to the Paying Agent prior
to the close of business on the Repurchase Date, in accordance with the terms of
this Indenture.

        The price at which shares of Common Stock shall be delivered upon
conversion (herein called the "conversion price") shall be initially $127.44 per
share of Common Stock, which is equal to a conversion rate of 7.8468 shares per
$1,000 principal amount of the Securities (the "Conversion Rate"). The
conversion price shall be adjusted in certain instances as provided in Section
13.04.

        In case the Company shall, by dividend or otherwise, declare or make a
distribution on its Common Stock referred to in Section 13.04(d) or 13.04(e)
(including dividends or distributions referred to in the last sentence of
Section 13.04(d)), the Holder of each Security, upon the conversion thereof
pursuant to this Article 13 subsequent to the close of business on the date
fixed for the determination of stockholders entitled to receive such
distribution and prior to the effectiveness of the conversion price adjustment
in respect of such distribution pursuant to Section 13.04(d) or 13.04(e), shall
also be entitled to receive for each share of Common Stock into which such
Security is converted, the portion of the evidences of indebtedness, shares of
capital stock, securities, cash and other property so distributed applicable to
one share of Common Stock; provided, however, that, at the election of the
Company (whose election shall be evidenced by a Board Resolution) with respect
to all Holders so converting, the Company may, in lieu of distributing to such
Holder any portion of such distribution not consisting of cash or securities of
the Company, pay such Holder an amount in cash equal to the fair market value
thereof (as determined in good faith by the Board of Directors, whose
determination shall be conclusive and described in a Board Resolution). If any
conversion of a Security described in the immediately preceding sentence occurs
prior to the payment date for a distribution to holders of Common Stock which
the Holder of the Security so converted is entitled to receive in accordance
with the immediately preceding sentence, the Company may elect (such election to
be evidenced by a Board Resolution) to distribute to such Holder a due bill for
the evidences of indebtedness, shares of capital stock, securities, cash or
assets to which such Holder is so entitled; provided that such due bill (i)
meets any applicable requirements of the principal national securities exchange
or other market on which the Common Stock is then traded and (ii) requires
payment or delivery of such evidences of indebtedness, shares of capital stock,
securities, cash or assets no later than the date of payment or delivery thereof
to holders of Common Stock receiving such distribution.

                                      -55-
<PAGE>

     Section 13.02. Exercise of Conversion Privilege. In order to exercise the
conversion privilege, the Holder of any Security to be converted shall surrender
such Security, duly endorsed or assigned to the Company or in blank, at any
office or agency maintained by the Company pursuant to Section 10.02 of this
Indenture, accompanied by (a) written notice to the Company in substantially the
form of conversion notice attached to the form of Security attached as Exhibit A
hereto at such office or agency that the Holder elects to convert such Security
or, if less than the entire principal amount thereof is to be converted, the
portion thereof to be converted and (b) if shares or any portion of such
Security not to be converted are to be issued in the name of a Person other than
the Holder thereof, the name of the Person in which to issue such shares.

        Except as provided in Section 5.02 of this Indenture, no Holder of
Security will be entitled upon conversion thereof to any payment or adjustment
on account of accrued and unpaid interest thereon or on account of dividends on
the shares of Common Stock issued in connection therewith. Securities
surrendered for conversion during the period from the close of business on any
Regular Record Date to the opening of business on the corresponding Interest
Payment Date (except Securities or a portion thereof being converted that shall
have been called for redemption on a Redemption Date during the period from the
close of business on any Regular Record Date to the opening of business on the
corresponding Interest Payment Date) must be accompanied by payment to the
Company in immediately available funds or other funds acceptable to the Company
of an amount equal to the interest payable on such Interest Payment Date on the
principal amount converted.

        Securities shall be deemed to have been converted immediately prior to
the close of business on the day of surrender of such Securities for conversion
in accordance with the foregoing provisions (the "Conversion Date"), 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, but in any event no later than the seventh Business Day
following the Conversion Date, the Company shall issue and shall deliver at such
office or agency a certificate or certificates for the number of full shares of
Common Stock issuable upon conversion, together with payment in lieu of any
fraction of a share as provided in Section 13.03.

        In the case of any Security which is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Security or
Securities of authorized denominations in aggregate principal amount equal to
the unconverted portion of the principal amount of such Security. Any
requirements for notice, surrender or delivery of Securities pursuant to this
Article 13 shall be subject to any Applicable Procedures.

     Section 13.03. Fractions of Shares. No fractional shares of Common Stock
shall be issued upon conversion of Securities. If more than one Security shall
be surrendered for conversion at one time by the same Holder, the number of full
shares which shall be issuable

                                      -56-
<PAGE>

upon conversion thereof shall be computed on the basis of the aggregate
principal amount of the Securities (or specified portions thereof) so
surrendered. Instead of any fractional share of Common Stock which would
otherwise be issuable upon conversion of any Security (or specified portions
thereof), the Company shall pay a cash adjustment in respect of such fraction in
an amount equal to the same fraction of the Closing Price per share of the
Common Stock at the close of business on the Trading Day immediately preceding
such day or, alternatively, the Company shall round up to the next higher whole
share.

     "Trading Day" shall mean each day on which the primary securities exchange
or quotation system which is used to determine the Closing Price is open for
trading or quotation.

     "Closing Price" of a single share of Common Stock on any Trading Day shall
mean the closing sale price per share for the Common Stock (or if no closing
sale price is reported, the average of the bid and ask prices or, if more than
one in either case, the average of the average bid prices and the average ask
prices) on such Trading Day as reported in composite transactions for the
principal United States securities exchange on which the Common Stock is traded
or, if the Common Stock is not listed on a United States national or regional
stock exchange, as reported by the National Association of Securities Dealers
Automated Quotation System.

     Section 13.04. Adjustment of Conversion Price. (a) In case the Company
shall pay or make a dividend or other distribution on its Common Stock
exclusively in Common Stock, the conversion price in effect at the opening of
business on the day next following the date fixed for the determination of
stockholders entitled to receive such dividend or other distribution shall be
reduced by multiplying such conversion price by a fraction of which the
numerator shall be the number of shares of Common Stock outstanding at the close
of business on the date fixed for such determination and the denominator shall
be the sum of such number of shares and the total number of shares constituting
such dividend or other distribution, such reduction to become effective
immediately after the opening of business on the day next following the date
fixed for such determination. For the purposes of this Section 13.04(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 shall 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 pay or make a dividend or other
distribution on its Common Stock consisting exclusively of, or shall otherwise
issue to all holders of its Common Stock, rights, warrants or options entitling
the holders thereof, for a period not exceeding 45 days, to subscribe for or
purchase shares of Common Stock at a price per share less than the current
market price per share (determined as provided in Section 13.04(g)) of the
Common Stock on the date fixed for the determination of stockholders entitled to
receive such rights, warrants or options, the conversion price in effect at the
opening of business on the day following the date fixed for such determination
shall be reduced by multiplying such conversion price by a fraction of which the
numerator shall be the number of

                                      -57-
<PAGE>

shares of Common Stock outstanding at the close of business on the date fixed
for such determination plus the number of shares of Common Stock which the
aggregate of the offering price of the total number of shares of Common Stock so
offered for subscription or purchase would purchase at such current market price
and the denominator shall be the number of shares of Common Stock outstanding at
the close of business on the date fixed for such determination plus the number
of shares of Common Stock so offered for subscription or purchase, such
reduction to become effective immediately after the opening of business on the
day following the date fixed for such determination. For the purposes of this
Section 13.04(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 shall not issue any rights, warrants or
options 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 price in effect
at the opening of business on the day following the day upon which such
subdivision becomes effective shall be proportionately reduced, and, conversely,
in case outstanding shares of Common Stock shall each be combined into a smaller
number of shares of Common Stock, the conversion price in effect at the opening
of business on the day following the day upon which such combination becomes
effective shall be proportionately increased, such reduction or increase, as the
case may be, to become effective immediately after the opening of business on
the day following the day upon which such subdivision or combination becomes
effective.

             (d) Subject to the last sentence of this Section 13.04(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, securities, cash or property (excluding any rights, warrants or options
referred to in Section 13.04(b), any dividend or distribution paid exclusively
in cash and any dividend or distribution referred to in Section 13.04(a)), the
conversion price shall be reduced so that the same shall equal the price
determined by multiplying the conversion price in effect immediately prior to
the effectiveness of the conversion price reduction contemplated by this Section
13.04(d) by a fraction of which the numerator shall be the current market price
per share (determined as provided in Section 13.04(g)) of the Common Stock on
the date of such effectiveness less the fair market value (as determined in good
faith by the Board of Directors, whose determination shall be conclusive and
described in a Board Resolution and shall, in the case of securities being
distributed for which prior thereto there is an actual or when issued trading
market, be no less than the value determined by reference to the average of the
Closing Prices in such market over the period specified in the succeeding
sentence), on the date of such effectiveness, of the portion of the evidences of
indebtedness, shares of capital stock, securities, cash and property so
distributed applicable to one share of Common Stock and the denominator shall be
such current market price per share of the Common Stock, such reduction to
become effective immediately prior to the opening of business on the day next
following the later of (i) the date fixed for the payment of such distribution
and (ii) the date 20 days after the notice relating to such distribution is
given pursuant to Section 13.06 (such later date of (i) and (ii) being referred
to as the "Reference

                                      -58-
<PAGE>

Date"). The provisions of this Section 13.04(d) shall not be applicable to an
event covered by Section 13.04(j) or a Rights IPO or any other public offering
by a Partner Company (as defined in Section 13.04(k)) that includes a Directed
Share Subscription Program (as defined in Section 13.04(k)). If the Board of
Directors determines the fair market value of any distribution for purposes of
this Section 13.04(d) by reference to the actual or when issued trading market
for any securities comprising such distribution, it must in doing so consider
the prices in such market over the same period used in computing the current
market price per share pursuant to Section 13.04(g). For purposes of this
Section 13.04(d), any dividend or distribution that includes shares of Common
Stock or rights, warrants or options to subscribe for or purchase shares of
Common Stock shall be deemed instead to be (A) a dividend or distribution of the
evidences of indebtedness, cash, property, shares of capital stock or securities
other than such shares of Common Stock or such rights, warrants or options
(making any conversion price reduction required by this Section 13.04(d))
immediately followed by (B) a dividend or distribution of such shares of Common
Stock or such rights (making any further conversion price reduction required by
Sections 13.04(a) or 13.04(b)), except (1) the Reference Date of such dividend
or distribution as defined in this Section 13.04(d) shall be substituted as "the
date fixed for the determination of stockholders entitled to receive such
dividend or other distributions," "the date fixed for the determination of
stockholders entitled to receive such rights, warrants or options" and "the date
fixed for such determination" within the meaning of Sections 13.04(a) and
13.04(b) and (2) any shares of Common Stock included in such dividend or
distribution shall not be deemed "outstanding at the close of business on the
date fixed for such determination" within the meaning of this Section 13.04(b).

             (e) In case the Company shall, by dividend or otherwise, make a
distribution to all holders of its Common Stock exclusively in cash in an
aggregate amount that, together with (i) the aggregate amount of any other
distributions to all holders of its Common Stock made exclusively in cash within
the 12 months preceding the date of payment of such distribution and in respect
of which no conversion price adjustment pursuant to this Section 13.04(e) has
been made and (ii) the aggregate of any cash plus the fair market value (as
determined in good faith by the Board of Directors, whose determination shall be
conclusive and described in a Board Resolution), as of the expiration of the
tender or exchange offer referred to below, of consideration payable in respect
of any tender or exchange offer by the Company or a Subsidiary for all or any
portion of the Common Stock concluded within the 12 months preceding the date of
payment of such distribution and in respect of which no conversion price
adjustment pursuant to this Section 13.04(f) has been made, exceeds 10% of the
product of the current market price per share (determined as provided in this
Section 13.04(g)) of the Common Stock as of the Trading Day immediately
preceding the record date fixed for stockholders entitled to receive such
distribution times the number of shares of Common Stock outstanding on such
record date, the conversion price shall be reduced so that the same shall equal
the price determined by multiplying the conversion price in effect immediately
prior to the effectiveness of the conversion price reduction contemplated by
this Section 13.04(e) by a fraction of which the numerator shall be the current
market price per share (determined as provided in this Section 13.04(e) of the
Common Stock on the date of such effectiveness less an amount equal to the
quotient of (x) the excess of such combined amount over such 10% and (y) the
number of shares

                                      -59-
<PAGE>

of Common Stock outstanding on the record date and (iii) the denominator of
which shall be equal to the current market price on such record date, such
reduction to become effective immediately prior to the opening of business on
the later of (a) the day following the record date fixed for the payment of such
distribution and (b) the date 20 days after the notice relating to such
distribution is given pursuant to Section 13.06.

             (f) In case a successful tender or exchange offer, other than an
odd lot offer, made by the Company or any Subsidiary for all or any portion of
the Common Stock shall involve an aggregate consideration having a fair market
value (as determined in good faith by the Board of Directors, whose
determination shall be conclusive and described in a Board Resolution) at the
last time (the "Expiration Time") tenders or exchanges may be made pursuant to
such tender or exchange offer (as it may be amended) that, together with (i) the
aggregate of the cash plus the fair market value (as determined in good faith by
the Board of Directors, whose determination shall be conclusive and described in
a Board Resolution), as of the expiration of the other tender or exchange offer
referred to below, of consideration payable in respect of any other tender or
exchange offer by the Company or a Subsidiary for all or any portion of the
Common Stock concluded within the preceding 12 months and in respect of which no
conversion price adjustment pursuant to this Section 13.04(f) has been made and
(ii) the aggregate amount of any distributions to all holders of the Common
Stock made exclusively in cash within the preceding 12 months and in respect of
which no conversion price adjustment pursuant to Section 13.04(e) has been made,
exceeds 10% of the product of the current market price per share (determined as
provided in Section 13.04(g)) of the Common Stock outstanding (including any
tendered shares) on the Expiration Time, the conversion price shall be reduced
(but not increased) so that the same shall equal the price determined by
multiplying the conversion price in effect immediately prior to the Expiration
Time by a fraction of which the numerator shall be (i) the product of the
current market price per share (determined as provided in Section 13.04(g)) of
the Common Stock on the Trading Day next succeeding the Expiration Time times
the number of shares of Common Stock outstanding (including any tendered or
exchanged shares) at the Expiration Time minus (ii) the fair market value
(determined as aforesaid) of the aggregate consideration payable to stockholders
based on the acceptance (up to any maximum specified in the terms of the tender
or exchange offer) of all shares validly tendered or exchanged and not withdrawn
as of the Expiration Time (the shares deemed so accepted, up to any such
maximum, being referred to as the "Purchased Shares") and the denominator shall
be the product of (i) such current market price per share on the Trading Day
next succeeding the Expiration Time times (ii) such number of outstanding shares
at the Expiration Time less the number of Purchased Shares, such reduction to
become effective immediately prior to the opening of business on the day
following the Expiration Time.

             (g) For the purpose of any computation under this Section 13.04(g)
and Sections 13.04(b),(d) and (e), the current market price per share of Common
Stock on any date in question shall be deemed to be the average of the daily
Closing Prices per share of Common Stock for the ten consecutive Trading Days
immediately prior to the date in question; provided, however, that (i) if the
"ex" date (as hereinafter defined) for any event (other than the issuance or
distribution requiring such computation) that requires an adjustment to the

                                      -60-
<PAGE>

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

                                      -61-
<PAGE>

tender or exchange offer means the first date on which the Common Stock trades
regular way on such exchange or in such market after the Expiration Time of such
tender or exchange offer.

     (h) The Company may make such reductions in the conversion price, in
addition to those required by paragraphs (a), (b), (c), (d), (e) and (f) of this
Section 13.04, as it considers to be advisable in order that any event treated
for Federal income tax purposes as a dividend of stock or stock rights shall not
be taxable to the recipients, or to diminish the amount of such tax payable.

     (i) No adjustment in the conversion price shall be required unless such
adjustment would require an increase or decrease of at least 1% in the
conversion price; provided, however, that any adjustments which by reason of
this Section 13.04(i) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment.

     (j) In the event that the Company distributes assets, debt securities,
rights, warrants or options (other than those referred to in Section 13.04(b)
above) pro rata to holders of Common Stock, and the fair market value of the
portion of assets, debt securities, rights, warrants or options applicable to
one share of Common Stock distributed to holders of Common Stock exceeds the
Average Sale Price (as defined below) per share of Common Stock, or such Average
Sale Price exceeds such fair market value by less than $1.00, then so long as
any such assets, debt securities, rights, options or warrants have not expired
or been redeemed by the Company, the Company shall make proper provision so that
the Holder of any Security upon conversion, rather than being entitled to an
adjustment in the conversion price, will be entitled to receive upon such
conversion, in addition to the Conversion Shares, a number of assets, debt
securities, rights, warrants and options to be determined as follows: (i) if
such conversion occurs on or prior to the date for the distribution to the
holders of assets, debt securities, rights, warrants or options of separate
certificates evidencing such assets, debt securities, rights, warrants or
options (the "Distribution Date"), the same number of assets, debt securities,
rights, warrants or options 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
assets, debt securities, rights, warrants or options being distributed, and (ii)
if such conversion occurs after such Distribution Date, the same number of
assets, debt securities, rights, warrants or options 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 assets, debt securities, rights,
warrants or options.

     "Average Sale Price" means the average of the Closing Prices of the Common
Stock for the shorter of (i) 30 consecutive Trading Days ending on the last full
Trading Day prior to the Time of Determination (as defined below) with respect
to the rights, options, warrants or distribution in respect of which the Average
Sale Price is being calculated, or (ii) the period (x) commencing on the date
next succeeding the first public announcement of (a) the issuance of

                                      -62-
<PAGE>

rights, options or warrants or (b) the distribution, in each case, in respect of
which the Average Sale Price is being calculated and (y) proceeding through the
last full Trading Day prior to the Time of Determination with respect to the
rights, options, warrants or distribution in respect of which the Average Sale
Price is being calculated, or (iii) the period, if any, (x) commencing on the
date next succeeding the Ex-Dividend Time (as defined below) with respect to the
next preceding (a) issuance of rights, warrants or options or (b) distribution,
in each case, for which an adjustment is required by the provisions of Section
13.04(b) or Section 13.04(j) and (y) proceeding through the last full Trading
Day prior to the Time of Determination with respect to the rights, options,
warrants, or distribution in respect of which the Average Sale Price is being
calculated. If the Ex-Dividend Time (or in the case of a subdivision,
combination or reclassification, the effective date with respect thereto) with
respect to a dividend, subdivision, combination or reclassification to which
Section 13.04(a) or (b) applies occurs during the period applicable for
calculating "Average Sale Price" pursuant to the definition in the preceding
sentence, "Average Sale Price" shall be calculated for such period in a manner
determined in good faith by the Board of Directors to reflect the impact of such
dividend, subdivision, combination or reclassification on the Closing Price of
the Common Stock during such period.

     "Time of Determination" means the time and date of the earlier of (i) the
determination of stockholders entitled to receive rights, warrants or options or
a distribution, in each case, to which this Section 13.04(j) applies and (ii)
the time ("Ex-Dividend Time") immediately prior to the commencement of
"ex-dividend" trading for such rights, options, warrants or distribution on the
New York Stock Exchange or such other national or regional exchange or market on
which the shares of Common Stock are listed or quoted.

          (k) (i) In case a Partner Company shall issue rights ("IPO Rights") in
a Rights IPO, effective on the date of such Partner Company's initial public
offering (the "Relevant Closing Date"), the conversion price on the date
immediately following the Relevant Closing Date shall be obtained by making the
following adjustment calculation:

               (A) dividing the average closing price of the IPO Rights on the
          last ten trading days that the IPO Rights were publicly traded, by the
          number of shares of Common Stock that are required, under the terms of
          the IPO Rights, to allow a holder of Common Stock to receive one IPO
          Right (the "Rights Value Per Share"), then

                   (B) multiplying (1) the Rights Value Per Share by (2) the
          principal amount of each Security divided by the conversion price in
          effect on the last day (the "Expiration Date") that the IPO Rights are
          publicly traded (the "Original Conversion Ratio" and the product of
          such function, the "Rights Value Per Security"), then

                   (C) dividing (1) the Rights Value Per Security by (2) the
          Closing Price for the Company's Common Stock on the Expiration Date
          minus the Rights Value per Share, and then

                                      -63-
<PAGE>

                   (D) dividing (1) the principal amount of each Security by (2)
          the sum of (C) plus the Original Conversion Ratio.

Any adjustment shall be successively made whenever any Rights IPO is completed,
and shall become effective on the Business Day following the closing of a Rights
IPO.

             (ii)  In case a Partner Company shall undertake, as part of the
initial public offering of its common stock pursuant to a registration statement
filed on Form S-1 under the Securities Act that includes a Directed Share
Subscription Program, the conversion price shall be subject to the following
adjustment:

                   (A) dividing the difference (if any, and in each case only
          where (1) is a higher number than (2) between (1) the average closing
          or last sale prices, as applicable, of the common stock of that
          Partner Company on the first four days its common stock is publicly
          traded and (2) the initial public offering price of its common stock,
          by (3) the number of shares of the Company's Common Stock required to
          subscribe for one share of common stock of that Partner Company (the
          "Subscription Value per Share"), then

                   (B) multiplying (1) the Subscription Value per Share by (2)
          the principal amount of each Security divided by the conversion price
          in effect on the fourth day that the common stock of the Partner
          Company was publicly traded (the "Relevant Conversion Ratio"), the
          product of such calculation being the "Subscription Value per
          Security", then

                   (C) taking the Subscription Value per Security and dividing
          by the Conversion Price in effect immediately prior to the adjustment
          made hereunder, and then

                   (D) dividing (1) the principal amount of each Security by (2)
          the sum of (C) plus the Relevant Conversion Ratio.

     Any adjustment shall be successively made whenever a Partner Company
completes an initial public offering which includes a Directed Share
Subscription Program, if any, and will be effective on the fifth Business Day
following the Relevant Closing Date.

     "Rights IPO" means an initial public offering of the common stock of a
Partner Company solely through the issuance of rights, by such Partner Company,
to purchase such common stock to the shareholders of the Company.

     "Directed Share Subscription Program" means a program whereby all
shareholders of the Company are entitled to purchase a portion of the shares
offered by a Partner Company in that Partner Company's initial public offering.

                                      -64-
<PAGE>

     Section 13.05 Notice of Adjustments of Conversion Price. Whenever the
conversion price is adjusted as herein provided: the Company shall compute the
adjusted conversion price in accordance with Section 13.04 and shall prepare a
certificate signed by the Chief Financial Officer of the Company setting forth
the adjusted conversion price and showing in reasonable detail the facts upon
which such adjustment is based, and such certificate shall forthwith be filed
(with a copy to the Trustee) at each office or agency maintained for the purpose
of conversion of Securities pursuant to Section 10.02 of the Indenture; and

     Section 13.06 Notice of Certain Corporate Action. In case:

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

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

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

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

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

then the Company shall cause to be filed at each office or agency maintained for
the purpose of conversion of Securities pursuant to Section 10.02 of the
Indenture, and shall cause to be mailed to all Holders at their last addresses
as they shall appear in the Security Register, at least 20 days (or 10 days in
any case specified in clause 13.06(a) or 13.06(b) above) prior to the applicable
record, effective or expiration date hereinafter specified, a notice stating (x)
the date on which a record is to be taken for the purpose of such dividend,
distribution or granting of rights, warrants or options, or, if a record is not
to be taken, the date as of which the holders of Common Stock of record to be
entitled to such dividend, distribution, rights, warrants or options are to be
determined, or (y) the date on which such reclassification, consolidation,
merger, sale, transfer, dissolution, liquidation or winding up is expected to
become effective, and the date as of which it is expected that holders of Common
Stock of record shall be entitled to exchange their shares of Common Stock for
securities, cash or other property deliverable upon such reclassification,
consolidation, merger, sale, transfer, dissolution, liquidation or winding up,
or (z) the date on

                                      -65-
<PAGE>

which such tender offer commenced, the date on which such tender offer is
scheduled to expire unless extended, the consideration offered and the other
material terms thereof (or the material terms of any amendment thereto).

     Section 13.07 Company's Obligation Regarding Common Stock. The Company
shall at all times reserve and keep available, free from preemptive rights, out
of its authorized but unissued Common Stock, solely for the purpose of effecting
the conversion of Securities, the whole number of shares of Common Stock then
issuable upon the conversion in full of all outstanding Securities.

          Before taking any action which would cause an adjustment reducing the
conversion price below the then par value, if any, of the shares of Common Stock
issuable upon conversion of the Securities, the Company will take all corporate
action which may, in the opinion of its counsel, be necessary in order that the
Company may validly and legally issue shares of such Common Stock at such
adjusted conversion price.

          The Company covenants that if any shares of Common Stock to be
provided for the purpose of conversion of Securities hereunder require
registration with or approval of any governmental authority under any federal or
state law before such shares may be validly issued upon conversion, the Company
will in good faith and as expeditiously as practicable endeavor to secure such
registration or approval, as the case may be.

          The Company further covenants that so long as the Common Stock shall
be listed or quoted on the New York Stock Exchange, the Nasdaq Stock Market
(National Market), or any other national securities exchange the Company will,
if permitted by the rules of such exchange, list and keep listed so long as the
Common Stock shall be so listed on such market or exchange, all Common Stock
issuable upon conversion of the Securities.

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

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

                                      -66-
<PAGE>

     Section 13.10 Cancellation of Converted Securities. All Securities
delivered for conversion shall be delivered to the Trustee to be cancelled by or
at the direction of the Trustee, which shall dispose of the same as provided in
Section 3.08 of this Indenture.

     Section 13.11 Provisions in Case of Reclassification, Consolidation, Merger
or Sale of Assets. In the event that the Company shall be a party to any
transaction (including any (i) recapitalization or reclassification of the
Common Stock (other than a change in par value, or from par value to no par
value, or from no par value to par value, or as a result of a subdivision or
combination of the Common Stock), (ii) any consolidation of the Company with, or
merger of the Company into, any other person, any merger of another person into
the Company (other than a merger which does not result in a reclassification,
conversion, exchange or cancellation of outstanding shares of Common Stock of
the Company), (iii) any sale or transfer of all or substantially all of the
assets of the Company or (iv) any compulsory share exchange) pursuant to which
the Common Stock is converted into the right to receive other securities, cash
or other property, then lawful provision shall be made as part of the terms of
such transaction whereby the Holder of each Security then Outstanding shall have
the right thereafter to convert such Security only into (subject to funds being
legally available for such purpose under applicable law at the time of such
conversion) the kind and amount of securities, cash and other property
receivable upon such transaction by a holder of the number of shares of Common
Stock into which such Security might have been converted immediately prior to
such transaction. The Company or the person formed by such consolidation or
resulting from such merger or which acquired such assets or which acquired the
Company's shares of Common Stock, as the case may be, shall execute and deliver
to the Trustee a supplemental indenture establishing such rights. Such
supplemental indenture shall provide for adjustments which, for events
subsequent to the effective date of such supplemental indenture, shall be as
nearly equivalent as may be practicable to the adjustments provided for in this
Article. The above provisions of this Section 13.11 shall similarly apply to
successive transactions of the foregoing type.

     Section 13.12 Company's Obligation. All calculations, adjustments,
conversions and other determinations under this Article 13 shall be the sole
responsibility and obligation of the Company. The Trustee (a) shall have no
obligation to review, challenge or contest any such calculation, adjustment,
conversion or other determination and (b) shall not be liable for any default or
error by the Company under this Article 13.

                                  ARTICLE XIV

                                 Subordination


     Section 14.01 Securities Subordinate to Senior Indebtedness. The Company
covenants and agrees, and each Holder of Securities, by such Holder's acceptance
thereof, likewise covenants and agrees, that, to the extent and in the manner
hereinafter set forth in this Article 14, the indebtedness represented by the
Securities and the payment of the principal of (and premium, if any), and
interest on and all other amounts payable under each and all of the Securities
including, but not limited to, the Redemption Prices, the Make-Whole Payment and
the

                                      -67-
<PAGE>

Repurchase Price payable with respect to the Securities in accordance with
Article 11 or Article 12, as the case may be, and all obligations of the Company
under the Indenture are hereby expressly made subordinate and subject in right
of payment to the prior payment in full of all Senior Indebtedness.

     Section 14.02 Payment over of Proceeds upon Dissolution, Etc. In the event
of (a) any insolvency or bankruptcy case or proceeding, or any receivership,
liquidation, reorganization or other similar case or proceeding in connection
therewith, relative to the Company or to its creditors, as such, or to its
assets, or (b) any liquidation, dissolution or other winding-up of the Company,
whether voluntary or involuntary and whether or not involving insolvency or
bankruptcy, or (c) any assignment for the benefit of creditors or any other
marshaling of assets and liabilities of the Company, then and in any such event
the holders of Senior Indebtedness shall be entitled to receive payment in full
of all amounts due or to become due on or in respect of all Senior Indebtedness,
or provision shall be made for such payment in cash or cash equivalents or
otherwise in a manner satisfactory to the holders of Senior Indebtedness, before
the Holders of the Securities are entitled to receive any payment on account of
principal of (or premium, if any), or interest on or any other amount payable
under the Securities, including, but not limited to, the Redemption Prices, the
Make-Whole Payment and the Repurchase Price payable with respect to the
Securities in accordance with Article 11 or Article 12, as the case may be, and
to that end the holders of Senior Indebtedness shall be entitled to receive, for
application to the payment thereof, any payment or distribution of any kind or
character, whether in cash, property or securities, which may be payable or
deliverable in respect of the Securities in any such case, proceeding,
dissolution, liquidation or other winding-up or event.

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

     For purposes of this Article 14 only, the words "cash, property or
securities" shall not be deemed to include shares of capital stock of the
Company as reorganized or readjusted, or securities of the Company or any other
corporation provided for by a plan of reorganization or readjustment which in
either case are subordinated in right of payment to all Senior Indebtedness
which may at the time be outstanding to substantially the same extent as, or to
a greater extent than, the Securities are so subordinated as provided in this
Article 14. The

                                      -68-
<PAGE>

consolidation of the Company with, or the merger of the Company into, another
Person or the liquidation or dissolution of the Company following the conveyance
or transfer of its properties and assets substantially as an entirety to another
Person upon the terms and conditions set forth in Article 8 shall not be deemed
a dissolution, winding-up, liquidation, reorganization, assignment for the
benefit of creditors or marshaling of assets and liabilities of the Company for
the purposes of this Section 14.02 if the Person formed by such consolidation or
into which the Company is merged or which acquires by conveyance or transfer
such properties and assets substantially as an entirety, as the case may be,
shall, as a part of such consolidation, merger, conveyance or transfer, comply
with the conditions set forth in Article 8.

     Section 14.03 No Payment When Senior Indebtedness in Default. (a) In the
event and during the continuation of any default in the payment of principal of
(or premium, if any) or interest on any Senior Indebtedness beyond any
applicable grace period with respect thereto (unless and until such payment
default shall have been cured or waived in writing by the holders of such Senior
Indebtedness), or (b) any default (other than a payment default) with respect to
Senior Indebtedness occurs and is continuing that permits the acceleration of
the maturity thereof and judicial proceedings shall be pending with respect to
any such default or the Company receives written notice of such default (a
"Senior Indebtedness Default Notice"), then no payment shall be made by the
Company on account of principal of (or premium, if any) or interest on the
Securities or on account of the redemption, purchase or other acquisition of
Securities (including pursuant to Articles 2, 11, 12 and 13). Notwithstanding
the foregoing, payments with respect to the Securities may resume and the
Company may acquire Securities for cash when (x) the default with respect to the
Senior Indebtedness is cured or waived or ceases to exist or (y) in the case of
a default described in (b) above, 179 or more days pass after the Senior
Indebtedness Default Notice is received by the Company; provided, that the terms
of this Indenture otherwise permit the payment or acquisition of the Securities
at that time. If the Company receives a Senior Indebtedness Default Notice, then
a similar notice received within nine months thereafter relating to the same
default on the same issue of Senior Indebtedness shall not be effective to
prevent the payment or acquisition of the Securities as described in the first
sentence of this Section 14.03(a). In addition, no payment may be made on the
Securities if any Securities are declared due and payable prior to their Stated
Maturity by reason of the occurrence of an Event of Default until the earlier of
(i) 120 days after the date of such acceleration or (ii) the payment in full of
all Senior Indebtedness, but only if such payment is then otherwise permitted
under the terms of this Indenture.

     In the event that, notwithstanding the foregoing, the Company shall make
any payment to the Trustee or the Holder of Securities prohibited by the
foregoing provisions of this Section 14.03, and if, at or prior to the time of
such payment, written notice that such payment is prohibited by the foregoing
paragraph shall have been actually given to a Responsible Officer of the Trustee
or, as the case may be, such Holder, then and in such event such payment shall
be paid over and delivered forthwith to the Company.

     The provisions of this Section 14.03 shall not apply to any payment with
respect to which Section 14.02 would be applicable.

                                      -69-
<PAGE>

     Section 14.04 Payment Permitted If No Default. Nothing contained in this
Article 14 or elsewhere herein or in any of the Securities shall prevent (a) the
Company, at any time except during the pendency of any case, proceeding,
dissolution, liquidation or other winding-up, assignment for the benefit of
creditors or other marshaling of assets and liabilities of the Company referred
to in Section 14.02 or except under the conditions described in Section 14.03,
from making payments at any time of principal of (and premium, if any), or
interest on, or any other amount under the Securities, including, but not
limited to, the Redemption Prices, the Make-Whole Payment and the Repurchase
Price payable with respect to the Securities in accordance with Article 11 or
Article 12, as the case may be, or (b) the application by the Trustee of any
money deposited with it hereunder to the payment of or on account of the
principal of (and premium, if any), or interest on, or any other amount under
the Securities including, but not limited to, the Redemption Prices, the
Make-Whole Payment and the Repurchase Price payable with respect to the
Securities in accordance with Article 11 or Article 12, as the case may be, or
the retention of such payment by the Holders, if, two Business Days prior to
such application by the Trustee, the Trustee had not received written notice
that such payment would be prohibited by the provisions of this Article 14.

     Section 14.05 Subrogation to Rights of Holders of Senior Indebtedness.
Subject to the payment in full of all Senior Indebtedness, and until the
Securities are paid in full, the Holders of the Securities shall be subrogated
(equally and ratably with the holders of all indebtedness of the Company which
by its express terms is subordinated to indebtedness of the Company to
substantially the same extent as the Securities are subordinated and is entitled
to like rights of subrogation) to the rights of the holders of such Senior
Indebtedness to receive payments and distributions of cash, property and
securities applicable to the Senior Indebtedness to the extent that payments and
distributions otherwise payable to Holders of Securities have been applied to
the payment of Senior Indebtedness as provided by this Article 14. For purposes
of such subrogation, no payments or distributions to the holders of the Senior
Indebtedness of any cash, property or securities to which the Holders of the
Securities or the Trustee would be entitled, except for the provisions of this
Article 14, and no payments over pursuant to the provisions of this Article 14
to the holders of Senior Indebtedness by Holders of the Securities or the
Trustee, shall, as among the Company, its creditors other than holders of Senior
Indebtedness and the Holders of the Securities, be deemed to be a payment or
distribution by the Company to or on account of the Senior Indebtedness.

     Section 14.06 Provisions Solely to Define Relative Rights. The provisions
of this Article 14 are and are intended solely for the purpose of defining the
relative rights of the Holders of the Securities on the one hand and the holders
of Senior Indebtedness on the other hand. Nothing contained in this Article 14
or elsewhere herein or in the Securities is intended to or shall:

                (a)   impair, as among the Company, its creditors other than
holders of Senior Indebtedness and the Holders of the Securities, the obligation
of the Company, which is absolute and unconditional (and which, subject to the
rights under this Article 14 of the holders of Senior Indebtedness, is intended
to rank equally with all other general obligations of the Company), to pay to
the Holders of the Securities the principal of (and premium, if any), and

                                      -70-
<PAGE>

interest on, and any other amount payable under the Securities including, but
not limited to, the Redemption Prices and the Repurchase Price payable with
respect to the Securities in accordance with Article 11 and Article 12,
respectively, as and when the same shall become due and payable in accordance
with their terms;

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

                   (c) prevent the Trustee or the Holder of any Securities from
exercising all remedies otherwise permitted by applicable law upon default under
this Indenture, subject to the rights, if any, under this Article 14 of the
holders of Senior Indebtedness to receive cash, property and securities
otherwise payable or deliverable to the Trustee or such Holder.

     Section 14.07 Trustee to Effectuate Subordination. Each Holder of
Securities by its acceptance thereof authorizes and directs the Trustee on its
behalf to take such action as may be necessary or appropriate to effectuate the
subordination provided in this Article 14 and appoints the Trustee its
attorney-in-fact for any and all such purposes.

     Section 14.08 No Waiver of Subordination Provisions. No right of any
present or future holder of any Senior Indebtedness to enforce subordination as
herein provided shall at any time in any way be prejudiced or impaired by any
act or failure to act on the part of the Company or by any act or failure to
act, in good faith, by any such holder, or by any noncompliance by the Company
with the terms, provisions and covenants of this Indenture, regardless of any
knowledge thereof any such holder may have or be otherwise charged with.

     Without in any way limiting the generality of the foregoing paragraph, the
holders of Senior Indebtedness may, at any time and from time to time, without
the consent of or notice to the Trustee or the Holders of the Securities,
without incurring responsibility to the Holders of the Securities and without
impairing or releasing the subordination provided in this Article 14 or the
obligations hereunder of the Holders of the Securities to the holders of Senior
Indebtedness, 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 Indebtedness, or otherwise
amend or supplement in any manner Senior Indebtedness or any instrument
evidencing the same or any agreement under which Senior Indebtedness is
outstanding;

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

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

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

                                      -71-
<PAGE>

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

     Section 14.09 Notice to Trustee. The Company shall give prompt written
notice to the Trustee if, to the Company's knowledge, any payment to or by the
Trustee in respect of the Securities is prohibited by this Article 14.
Notwithstanding the provisions of this Article 14 or any other provision of this
Indenture, the Trustee shall not be charged with knowledge that any payment to
or by the Trustee in respect of the Securities is prohibited by this Article 14,
unless and until a Responsible Officer of the Trustee shall have received
written notice thereof from the Company or a holder of Senior Indebtedness or
from any trustee therefor; and, prior to the receipt of any such written notice,
the Trustee, subject to the provisions of Section 1.04, shall be entitled in all
respects to assume that no facts exist that would prohibit any payment in
respect of the Securities; provided, however, that if a Responsible Officer of
the Trustee shall not have received the notice provided for in this Section
14.09 at least two Business Days prior to the date upon which by the terms
hereof any money may become payable for any purpose (including the payment of
the principal of (and premium, if any) or interest on any Security), then,
anything herein contained to the contrary notwithstanding, the Trustee shall
have full power and authority to receive such money and to apply the same to the
purpose for which such money was received and shall not be affected by any
notice to the contrary which may be received by it within two Business Days
prior to such date.

     Subject to the provisions of Article 6, the Trustee shall be entitled to
rely on the delivery to it of a written notice by a Person representing itself
to be a holder of Senior Indebtedness (or a trustee therefor) to establish that
such notice has been given by a holder of Senior Indebtedness (or a trustee
therefor). In the event that the Trustee determines in good faith that further
evidence is required with respect to the right of any Person as a holder of
Senior Indebtedness to participate in any payment or distribution pursuant to
this Article 14, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Indebtedness
held by such Person, the extent to which such Person is entitled to participate
in such payment or distribution and any other facts pertinent to the rights of
such Person under this Article 14, 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 14.10 Reliance on Judicial Order or Certificate of Liquidating
Agent. Upon any payment or distribution of assets of the Company referred to in
this Article 14, the Trustee, subject to the provisions of Article 6, and the
Holders of the Securities shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such insolvency,
bankruptcy, receivership, liquidation, reorganization, dissolution, winding up
or similar case or proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit
of creditors, agent or other Person making such payment or distribution,
delivered to the Trustee or to the Holders of Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof

                                      -72-
<PAGE>

or payable thereon, the amount or amounts paid or distributed thereon and all
other facts pertinent thereto or to this Article 14.

     Section 14.11 Trustee Not Fiduciary for Holders of Senior Indebtedness. The
Trustee shall not be deemed to owe any fiduciary duty to the holders of Senior
Indebtedness and shall not be liable to any such holders if it shall in good
faith mistakenly pay over or distribute to Holders of Securities or to the
Company or to any other Person cash, property or securities to which any holders
of Senior Indebtedness shall be entitled by virtue of this Article 14 or
otherwise.

     Section 14.12 Rights of Trustee as Holder of Senior Indebtedness;
Preservation of Trustee's Rights. The Trustee in its individual capacity shall
be entitled to all the rights set forth in this Article 14 with respect to any
Senior Indebtedness which may at any time be held by it, to the same extent as
any other holder of Senior Indebtedness, and nothing in this Indenture shall
deprive the Trustee of any of its rights as such holder.

             Nothing in this Article 14 shall apply to claims of, or payments
to, the Trustee under or pursuant to Section 6.07.

     Section 14.13 Article Applicable to Paying Agents. In case at any time any
Paying Agent other than the Trustee shall have been appointed by the Company and
be then acting hereunder, the term "Trustee" as used in this Article 14 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 14 in addition to or
in place of the Trustee; provided, however, that Section 14.12 shall not apply
to the Company or any Affiliate of the Company if it or such Affiliate acts as
Paying Agent.

     Section 14.14 Certain Conversions Deemed Payment. For the purposes of this
Article 14 only, (1) the issuance and delivery of junior securities upon
conversion of Securities in accordance with Article 13 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 redemption, purchase or other
acquisition of Securities, and (2) the payment, issuance or delivery of cash,
property or securities (other than junior securities) upon conversion of a
Security shall be deemed to constitute payment on account of the principal of
such Security. For the purposes of this Section 14.14, the term "junior
securities" means (a) shares of any stock of any class of the Company and (b)
securities of the Company which are subordinated in right of payment to the
prior payment in full of all Senior Indebtedness which may be outstanding at the
time of issuance or delivery of such securities to substantially the same extent
as, or to a greater extent than, the Securities are so subordinated as provided
in this Article 14. Nothing contained in this Article 14 or elsewhere in this
Indenture or in the Securities is intended to or shall impair, as among the
Company, its creditors other than holders of Senior Indebtedness and the Holders
of the Securities, the right, which is absolute and unconditional, of the Holder
of any Security to convert such Security in accordance with Article 13.

                                      -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.

                               INTERNET CAPITAL GROUP, INC.

                               By:   /s/ Walter W. Buckley, III
                                  -------------------------------------------
                                  Name:  Walter W. Buckley, III
                                  Title: President and Chief Executive Officer


                               CHASE MANHATTAN TRUST COMPANY,
                               NATIONAL ASSOCIATION, as Trustee

                               By:   /s/ Karen Vera
                                  -------------------------------------------
                                  Name:  Karen Vera
                                  Title: Assistant Vice President

                                      -74-
<PAGE>

                                   Exhibit A


[Legend for Global Security only

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

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

                         Internet Capital Group, Inc.

                5 1/2 % CONVERTIBLE SUBORDINATED NOTE DUE 2004


Registered                                               $

No. R-                                              CUSIP

INTERNET CAPITAL GROUP, INC., a corporation duly organized and existing under
the laws of the State of Delaware (herein called the "Company", which term
includes any successor under the Indenture hereinafter referred to), for value
received, hereby promises to pay to [CEDE & CO.]1 [______________] or registered
assigns, the principal sum of $____________ at the office or agency of the
Company in the Borough of Manhattan, The City of New York, on ! 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, and to pay interest on
said principal sum

________________________
     1 For Global Securities Only.

                                      -75-
<PAGE>

semiannually on December 21 and June 21 of each year, commencing June 21, 2000
(each an "Interest Payment Date"), at said office or agency, in like coin or
currency, at the rate of 5 1/2% per annum, until the principal hereof is paid or
made available for payment. The interest so payable, and punctually paid or duly
provided for, on any Interest Payment Date will, as provided in such Indenture,
be paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest, which shall be the December 6 or June 6 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.
Any such interest not so punctually paid or duly provided for will forthwith
cease to be payable to the Holder on such Regular Record Date and may either be
paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on a Special Record Date for
the payment of such Defaulted Interest to be fixed by the Trustee, notice
whereof shall be given to Holders of Securities not less than 10 days prior to
such Special Record Date, or be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the
Securities may be listed, and upon such notice as may be required by such
exchange, all as more fully provided in said Indenture.

Payment of the principal of, premium, if any, and interest on this Security will
be made at the Corporate Trust Office, in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of
public and private debts either by (i) mailing a check for such interest,
payable to or upon the written order of the Person entitled thereto pursuant to
Section 3.07 of the Indenture (as defined herein) or (ii) transfer to an account
maintained by the payee located inside the United States.

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

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

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

                               INTERNET CAPITAL GROUP, INC.

                               By: _______________________________
                                   Name:
                                   Title:


                               By: _______________________________
                                   Name:
                                   Title:

                                      -76-
<PAGE>

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

                               Chase Manhattan Trust Company, National
                               Association
                                   as Trustee


                               By: _______________________________
                                   Name:
                                   Title:


                         [FORM OF REVERSE OF SECURITY]

                         Internet Capital Group, Inc.

                 5 1/2% CONVERTIBLE SUBORDINATED NOTE DUE 2004



This Security is one of a duly authorized issue of Securities of the Company
designated as its 5 1/2% Convertible Subordinated Notes due 2004 (herein called
the "Securities"), limited in aggregate principal amount to $566,250,000, issued
and to be issued under an Indenture, dated as of December 21, 1999 (the
"Indenture"), between the Company and Chase Manhattan Trust Company, National
Association, as Trustee for the Holders of Securities issued under said
Indenture (herein called the "Trustee", which term includes any successor
trustee under the Indenture), to which Indenture and all indentures supplemental
thereto reference is hereby made for a statement of the respective rights,
limitations of rights, duties and immunities thereunder of the Company, the
Trustee, the holders of Senior Indebtedness and the Holders of the Securities
and of the terms upon which the Securities are, and are to be, authenticated and
delivered.

Subject to and upon compliance with the provisions of the Indenture, the Holder
of this Security is entitled, at its option, at any time on or before maturity
of the Securities, or in case this Security or a portion hereof is called for
redemption, then in respect of this Security or such portion hereof until and
including, but (unless the Company defaults in making the payment due upon
redemption or repurchase) not after, the close of business on the Business Day
immediately preceding the Redemption Date or Repurchase Date, as the case may
be, to convert this Security (or any portion of the principal amount hereof
which is U.S.$1,000 or an integral multiple thereof), at the principal amount
hereof, or of such portion, into fully paid and nonassessable shares of Common
Stock of the Company at a conversion price equal to $127.44 aggregate principal
amount of Securities for each share of Common Stock, which is equal to a
conversion rate of 7.8468 shares of common stock per $1,000 principal amount of
the Securities (or at the current adjusted conversion price if an adjustment has
been made as provided in Article 13 of the
<PAGE>

Indenture) by surrender of this Security, duly endorsed or assigned to the
Company or in blank, to the Company at its office or agency in the Borough of
Manhattan, The City of New York, accompanied by the conversion notice hereon
executed by the Holder hereof evidencing such Holder's election to convert this
Security, or if less than the entire principal amount hereof is to be converted,
the portion hereof to be converted, and, in case such surrender shall be made
during the period from the close of business on any Regular Record Date to the
opening of business on the corresponding Interest Payment Date (unless this
Security or the portion hereof being converted has been called for redemption on
a Redemption Date within such period between and including such Regular Record
Date and such Interest Payment Date), also accompanied by payment in 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. Subject to the aforesaid requirement for payment of interest and, in
the case of a conversion after the close of business on any Regular Record Date
and on or before the corresponding Interest Payment Date, to the right of the
Holder of this Security (or any Predecessor Security) of record at such Regular
Record Date to receive an installment of interest (even if the Security has been
called for redemption on a Redemption Date within such period), no payment or
adjustment is to be made on conversion for interest accrued hereon or for
dividends on the Common Stock issued on conversion. No fractions of shares or
scrip representing fractions of shares will be issued on conversion, but instead
of any fractional interest the Company shall pay a cash adjustment or round up
to the next higher whole share as provided in Article 13 of the Indenture. The
conversion price is subject to adjustment as provided in Article 13 of the
Indenture. In addition, the Indenture provides that in case of certain
reclassifications, consolidations, mergers, sales or transfers of assets or
other transactions pursuant to which the Common Stock is converted into the
right to receive other securities, cash or other property, the Indenture shall
be amended, 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, cash and other property receivable upon the transaction by
a holder of the number of shares of Common Stock into which this Security might
have been converted immediately prior to such transaction (assuming such holder
of Common Stock 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).

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

The Securities may be redeemed at the election of the Company, as a whole or
from time to time in part, at any time prior to December 21, 2002 (a
"Provisional Redemption"), at a Redemption Price equal to $1,000 per $1,000
principal amount of the Securities plus accrued and unpaid interest, if any, to
but excluding the date of redemption (the "Provisional Redemption Date") if the
Closing Price of the Common Stock has exceeded 150% of the conversion price (as
defined in Article 13 of the Indenture) then in effect for at least 20 Trading
Days in any consecutive 30-
<PAGE>

Trading Day period ending on the Trading Day prior to the date of mailing of the
provisional notice of redemption pursuant to Section 11.04 (the "Notice Date").

Upon any such Provisional Redemption, the Company shall make an additional
payment in cash (the "Make-Whole Payment") to holders of the Securities called
for redemption, including those Securities converted into Common Stock between
the Notice Date and the Provisional Redemption Date, in an amount equal to
$152.54 per $1,000 principal amount of the Securities, less the amount of any
interest actually paid on the Securities before the Notice Date.

The Securities (other than those Securities that have been converted in
accordance with the terms of the Indenture) are subject to redemption at the
option of the Company upon not less than 30 days' or more than 60 days' notice
by mail (unless a shorter notice is deemed satisfactory by the Trustee), as a
whole or from time to time in part, at any time on or after December 21, 2002.
The Redemption Prices (expressed as percentages of the principal amount) shall
be as set forth below for Securities redeemed during the following 12-month
period:


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

                     Period                       Redemption Price
---------------------------------------------------------------------------

December 21, 2002 through December 21, 2003                    102.2%
---------------------------------------------------------------------------

and thereafter at a Redemption Price equal to 101.1% of the principal amount,
together, in the case of any such redemption, with accrued interest to (but not
including) the Redemption Date (subject to the right of holders of record on the
Regular Record Date to receive interest on the related Interest Payment Date).
Any redemption of Securities must be in integral multiples of $1,000.

If fewer than all of the Securities are to be redeemed, the Trustee will select
the Securities to be redeemed in principal amounts at maturity of $1,000 or
integral multiples thereof by lot, pro rata or by another method the Trustee
considers fair and appropriate. If a portion of a Holder's Securities is
selected for partial redemption and that holder converts a portion of those
Securities prior to the redemption, the converted portion shall be deemed,
solely for purposes of determining the aggregate principal amount of the
Securities to be redeemed by the Company, to be of the portion selected for
redemption.

In certain circumstances involving a Change in Control, each Holder shall have
the right to require the Company to repurchase all or part of its Securities at
a repurchase price equal to 100% of the principal amount thereof, together with
accrued and unpaid interest through the Repurchase Date (subject to the right of
holders of record on the Regular Record Date to receive interest on the related
Interest Payment 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 having a fair market value equal to the
Repurchase Price. For the 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 Prices of the Common
<PAGE>

Stock for the five consecutive Trading Days ending on and including the Third
Trading Day immediately preceding the Repurchase Date.

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

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

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

If an Event of Default shall occur and be continuing, the principal of all the
Securities may be declared due and payable in the manner and with the effect
provided in Article 5 of the Indenture.

Subject to certain conditions set forth in the Indenture, the Company at any
time may terminate some or all of its obligations under the Securities and the
Indenture if the Company deposits with the Trustee money or Government
Obligations for the payment of principal and interest on the Securities to
redemption or maturity, as the case may be.

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 consent of the Holders of a
majority in aggregate principal amount of the Securities at the time
Outstanding. The Indenture also contains provisions permitting the Holders of a
majority in aggregate principal amount of the Securities at the time
Outstanding, on behalf of the Holders of all the Securities, to waive compliance
by the Company with certain provisions of the Indenture and certain past
defaults under the Indenture and their consequences. Any such consent or waiver
by the Holder of this Security shall be conclusive and binding upon such Holder
and upon all future Holders of this Security and of any Security issued upon the
registration of transfer hereof or in exchange herefor or in lieu hereof,
whether or not notation of such consent or waiver is made upon this Security.

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

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

The Securities are issuable only in registered form without coupons in
denominations of $1,000 and any integral multiple thereof. As provided in the
Indenture and subject to certain limitations therein set forth, upon request of,
and delivery of not less than three Business Days notice to the Company and the
Trustee, a beneficial owner of interests in a permanent global security may
exchange such interests for a definitive Security of like tenor and aggregate
principal amount in certificated form.

The depositary with respect to the Securities shall be The Depository Trust
Company.

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

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

Interest on this Security shall be computed on the basis of a 360-day year of
twelve 30-day months. In the event that any date on which interest is payable on
the Securities is not a Business Day, then payment of interest payable on such
date will be made on the next succeeding day which is a Business Day (and
without any interest or other payment in respect of any such delay).

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

THE INDENTURE AND THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO CONFLICT OF LAWS
PRINCIPLES.
<PAGE>

                           FORM OF CONVERSION NOTICE

                               CONVERSION NOTICE

To: INTERNET CAPITAL GROUP, INC.

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

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

Dated:
                               By: _______________________________
                                   Signature*


                               By: _______________________________
                                   Signature Guaranty
<PAGE>

          If shares or                            Principal amount
          Securities are to be                    to be converted
          registered in the                       (if less than all):
          name of a Person                        $_________,000
          other than the
          Holder, please print
          such Person's name
          and address:*



_________________________________       _________________________________
Name                                    Social Security or Taxpayer
Identification Number


_________________________________
Street Address


_________________________________
City, State and Zip Code

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

                                  EXHIBIT A-2


                   [Legend for definitive form of Security]

THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR ANY STATE SECURITIES ACT, AND MAY NOT BE TRANSFERRED WITHOUT
REGISTRATION UNDER SUCH ACTS OR AN OPINION OF COUNSEL, SATISFACTORY TO THE
COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED.

THESE SECURITIES ARE SUBJECT TO TRANSFER RESTRICTIONS CONTAINED IN A LETTER
AGREEMENT DATED DECEMBER 6, 1999 BETWEEN THE COMPANY AND THE INITIAL PURCHASER
OF THESE SECURITIES, A COPY OF WHICH IS AVAILABLE FOR INSPECTION AT THE OFFICES
OF THE COMPANY.