EXHIBIT 4.3
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                                                                EXECUTION COPY


         SUPPLEMENTAL  INDENTURE,  dated as of May 2, 2006 (this "SUPPLEMENTAL
INDENTURE"),  among MeriStar Hospitality  Corporation,  a Maryland corporation
("MERISTAR"),  Alcor  Acquisition  LLC, a Delaware limited  liability  company
("SUCCESSOR"),  and U.S.  Bank Trust  National  Association,  as trustee  (the
"TRUSTEE").


                                   RECITALS

         WHEREAS,  MeriStar  and the Trustee have  executed  and  delivered an
Indenture,   dated  as  of  July  1,  2003  (the  "ORIGINAL  INDENTURE"),   as
supplemented  by an Officers'  Certificate  dated July 1, 2003 (the "OFFICERS'
CERTIFICATE,"  and,  together with the Original  Indenture,  the "SUPPLEMENTED
ORIGINAL   INDENTURE"  and,  as  amended  by  this   Supplemental   Indenture,
collectively,  the "INDENTURE"), to establish the terms of and provide for the
issuance and delivery by MeriStar of its 9.50% Convertible  Subordinated Notes
due 2010 (the "NOTES");

         WHEREAS,  MeriStar and  Successor  have entered into an Agreement and
Plan of Merger, dated as of February 20, 2006 (the "MERGER AGREEMENT"), by and
among MeriStar,  MeriStar Hospitality Operating  Partnership,  L.P. ("MeriStar
Operating  Partnership"),   Alcor  Holdings  LLC  ("Alcor  Holdings"),   Alcor
Acquisition  Inc.,  Successor  and  Alcor  Acquisition  L.P.  ("Alcor  L.P."),
pursuant to which,  upon  satisfaction  of the terms of the Merger  Agreement,
MeriStar  will merge with and into  Successor,  a wholly owned  subsidiary  of
Alcor Holdings, with Successor being the surviving company (the "MERGER"), and
Alcor L.P.,  whose general partner is an indirect,  wholly owned subsidiary of
Alcor Holdings, will merge with and into MeriStar Operating Partnership,  with
MeriStar Operating Partnership being the surviving partnership;

         WHEREAS,  Section  9.01  of  the  Original  Indenture  provides  that
MeriStar and the Trustee may enter into  supplemental  indentures  without the
consent of any Holder to comply with Article 8 of the Original Indenture;

         WHEREAS,  Section 5.6 of the Officers'  Certificate  provides that in
the event of certain  mergers,  the  successor  to such merger and the Trustee
shall enter into a supplemental indenture to comply with such Section;

         WHEREAS,  Successor desires to enter into this Supplemental Indenture
and to provide that,  effective as of the Effective  Time (as defined  below),
Successor will expressly  assume all of the  obligations of MeriStar under the
Indenture  and the Notes and to provide that upon a Holder's  conversion  of a
Note in  accordance  with  the  terms of the  Indenture  from  and  after  the
Effective  Time, such Holder will receive the amount of cash which such Holder
would have  received  upon the Merger if such Holder had  converted  such Note
immediately prior to the Effective Time; and

         WHEREAS,  all things necessary for the execution of this Supplemental
Indenture,  and to make this Supplemental  Indenture a valid supplement to the
Supplemented Original Indenture according to its terms and a valid and binding
agreement of Successor, have been done.


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         NOW, THEREFORE,  in consideration of the mutual agreements  contained
herein  and for  other  good  and  valuable  consideration,  the  receipt  and
sufficiency  of which is hereby  acknowledged,  the  parties  hereto  agree as
follows for the benefit of each other and for the equal and ratable benefit of
the Holders of the Notes:

                                   ARTICLE 1

                   REPRESENTATIONS OF MERISTAR AND SUCCESSOR

        SECTION 1.01.     MeriStar  represents  and warrants to the Trustee as
follows:

         (i)      MeriStar is a Maryland  corporation duly organized,  validly
existing and in good standing under the laws of the State of Maryland.

         (ii)     The  execution,  delivery  and  performance  by it  of  this
Supplemental  Indenture  have been  authorized  and approved by all  necessary
corporate action on its part.

        SECTION 1.02.     Successor  represents and warrants to the Trustee as
follows:

         (i)      Successor is a limited  liability  company  duly  organized,
validly existing and in good standing under the laws of the State of Delaware.

         (ii)     The  execution,  delivery  and  performance  by it  of  this
Supplemental  Indenture  have been  authorized  and approved by all  necessary
limited liability company action on its part.

         SECTION 1.03.    Each  of  MeriStar  and  Successor   represents  and
warrants to the Trustee that upon the later of the filling and  acceptance for
record by the Maryland State  Department of  Assessments  and Taxation and the
filing of the  Certificate  of Merger with the Secretary of State of the State
of  Delaware or at such other time  thereafter  as is  provided  therein  (the
"EFFECTIVE  TIME"),  the Merger will be effective in accordance with the terms
of the Merger Agreement and applicable law.

                                   ARTICLE 2


                           RATIFICATION; DEFINITIONS

         SECTION 2.01.    SUPPLEMENTAL INDENTURE.  This Supplemental Indenture
constitutes  an integral part of, is  supplemental  to, and is entered into in
accordance with, Section 9.01 of the Original Indenture and Section 5.6 of the
Officers'  Certificate  and, except as modified,  amended and  supplemented by
this  Supplemental  Indenture,  the  provisions of the  Supplemented  Original
Indenture  are ratified and confirmed in all respects and shall remain in full
force and effect.

         SECTION 2.02.    DEFINITIONS.  For all purposes of this  Supplemental
Indenture:


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         (a)      Capitalized terms used herein without  definition shall have
the meanings specified in the Supplemented Original Indenture; and

         (b)      The terms "herein," "hereof," "hereunder" and other words of
similar import refer to this Supplemental Indenture.

                                   ARTICLE 3

               AMENDMENTS TO THE SUPPLEMENTED ORIGINAL INDENTURE

         SECTION 3.01.    ASSUMPTION OF  OBLIGATIONS  BY SUCCESSOR.  Successor
hereby  expressly  assumes all of the  obligations of MeriStar under the Notes
and the Indenture,  including,  without  limitation,  (i) the due and punctual
payment of the principal,  premium,  if any, and interest on all of the Notes,
as applicable, (ii) the payment of the Fixed Sum Conversion Amount (as defined
below) upon conversion of any Note and (iii) the performance and observance of
every  covenant of the  Indenture  on the part of MeriStar to be  performed or
observed.

         SECTION 3.02.    AMENDMENT   TO  THE  FIRST   PARAGRAPH.   The  first
paragraph of each of the Original  Indenture and the Officers'  Certificate is
hereby  amended  so that the term "the  Company"  as used  therein  shall mean
Successor. Pursuant to Section 8.03 of the Original Indenture, Successor shall
succeed to, and be substituted for, and may exercise every right and power of,
MeriStar under the Supplemented Original Indenture and the Notes with the same
effect  as  if  Successor  had  been  named  as  "the  Company"  therein;  and
thereafter,  MeriStar shall be relieved of all obligations and covenants under
the Supplemented Original Indenture and the Notes.

         SECTION 3.03.    AMENDMENTS TO CERTAIN  DEFINITIONS.  Section 1.01 of
the Original  Indenture is hereby amended so that the terms "Effective  Time,"
"Merger," "Merger  Agreement,"  "Successor" and "Fixed Sum Conversion  Amount"
shall have the meanings therein given them in this Supplemental Indenture.

         SECTION 3.04.    AMENDMENT  TO RIGHT TO CONVERT.  Pursuant to Section
5.6 of the Officers'  Certificate,  and subject to the terms and conditions of
the  Notes  and the  Supplemented  Original  Indenture,  from  and  after  the
Effective  Time,  any  Note   outstanding  on  the  Effective  Time  shall  be
convertible into a fixed sum of $1,026.52 in cash, without interest,  less any
required  withholding  taxes,  per $1,000 principal amount at maturity thereof
(the  "FIXED  SUM  CONVERSION  AMOUNT").  The  Notes  and  Section  5.1 of the
Officers' Certificate are hereby deemed amended accordingly.


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         SECTION 3.05.    AMENDMENT   TO   SECTION   5.5  OF   THE   OFFICERS'
CERTIFICATE.  The Fixed Sum Conversion  Amount shall not be subject to further
adjustment pursuant to Section 5.5 of the Officers' Certificate. The Notes and
Section 5.5 of the Officers' Certificate are hereby amended accordingly.

         SECTION 3.06.    AMENDMENT TO SECTION 1.05 OF THE ORIGINAL INDENTURE.
Clause (b) of Section  1.05 of the Original  Indenture is hereby  amended with
respect to the Notes by replacing the address of the relevant  issuer with the
following:

                     Alcor Holdings LLC
                     c/o Blackstone Real Estate Partners V L.P.
                     345 Park Avenue
                     New York, NY  10154
                     Attention:  Kenneth A. Caplan

                                   ARTICLE 4

                AMENDMENTS TO CERTAIN PROVISIONS OF THE NOTES;
                             NOTATION ON THE NOTES

         SECTION 4.01.    AMENDMENTS TO THE NOTES. Paragraph 17 of the reverse
of the  Notes is hereby  amended  by  replacing  it in its  entirety  with the
following:

                  "Subject  to the  provisions  of the  Indenture,  the Holder
                  hereof has the right,  at its  option,  at any time from and
                  after the Effective  Time and prior to the close of business
                  on April 1, 2010,  to convert  the  principal  hereof or any
                  portion of such principal which is $1,000  principal  amount
                  at maturity or an integral multiple thereof, for a fixed sum
                  of $1,026.52 in cash,  without  interest,  less any required
                  withholding  taxes,  per $1,000 principal amount at maturity
                  thereof,  upon  surrender  of  this  Note,  together  with a
                  conversion  notice as  provided in the  Indenture,  to Alcor
                  Acquisition LLC at the office or agency of Alcor Acquisition
                  LLC maintained for that purpose in the Borough of Manhattan,
                  The City of New York,  or at the option of such Holder,  the
                  Corporate  Trust  Office,  and,  unless the cash  payable on
                  conversion is to be paid in the same name as this Note, duly
                  endorsed by, or  accompanied  by  instruments of transfer in
                  form  satisfactory  to the  Company  duly  executed  by, the
                  Holder or by its duly authorized attorney.  No adjustment in
                  respect   of  accrued   interest   will  be  made  upon  any
                  conversion;  provided,  however,  that if this Note shall be
                  surrendered for conversion  during the period from the close
                  of  business  on any record date for the payment of interest
                  to the close of business on the Business Day  preceding  the
                  interest  payment date,  this Note must be accompanied by an
                  amount,  in New York  Clearing  House  funds or other  funds
                  acceptable to the Company,  equal to the interest payable on
                  such  interest  payment  date  on the  principal  amount  at
                  maturity being converted."


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         SECTION 4.02.    NOTATION ON NOTES.

         (a)      The Notes, as amended by the provisions of this Supplemental
Indenture, shall bear a notation substantially to the following effect:

                  "THE  TERMS OF THIS  NOTE HAVE BEEN  AMENDED  TO THE  EXTENT
                  PROVIDED IN THE SUPPLEMENTAL  INDENTURE,  DATED AS OF MAY 2,
                  2006,  AMONG ALCOR  ACQUISITION  LLC,  MERISTAR  HOSPITALITY
                  CORPORATION AND THE TRUSTEE.  THE TERMS OF THIS NOTE INCLUDE
                  THOSE  STATED  IN  THE  INDENTURE,  AS  SUPPLEMENTED  BY THE
                  SUPPLEMENTAL  INDENTURE,  AND  HOLDERS  ARE  REFERRED TO THE
                  INDENTURE AND THE SUPPLEMENTAL  INDENTURE FOR A STATEMENT OF
                  THOSE TERMS."

         (b)      The  Trustee  hereby  agrees  to cause the Notes to bear the
above notation pursuant to, and upon satisfaction of, the conditions set forth
in  Article 9 of the  Original  Indenture  and  Section  5.6 of the  Officers'
Certificate.

                                   ARTICLE 5

                                 MISCELLANEOUS

         SECTION 5.01.    EFFECTIVENESS.  This  Supplemental  Indenture  shall
become effective as of the Effective Time.

         SECTION 5.02.    EFFECT OF HEADINGS.  The Section headings herein are
for convenience only and shall not affect the construction hereof.

         SECTION 5.03.    CONFLICT WITH TRUST  INDENTURE ACT. If any provision
hereof limits,  qualifies or conflicts with another  provision hereof which is
required to be included or deemed included in this  Supplemental  Indenture by
any of the  provisions of the Trust  Indenture  Act,  such required  provision
shall control.  If any provision of this  Supplemental  Indenture  modifies or
excludes any  provision of the Trust  Indenture Act that may be so modified or
excluded,  such provision of the Trust  Indenture Act shall be deemed to apply
to this  Supplemental  Indenture as so modified or shall be  excluded,  as the
case may be.

         SECTION 5.04.    EFFECT OF SUPPLEMENTAL INDENTURE. Upon the execution
of this Supplemental  Indenture,  the Supplemented Original Indenture shall be
modified in accordance herewith,  and this Supplemental Indenture shall form a
part of the Supplemented Original Indenture for all purposes; and every Holder
of Securities  heretofore and hereafter  authenticated and delivered hereunder
shall be bound hereby.

         SECTION 5.05.    SUCCESSORS AND ASSIGNS.  All agreements of Successor
in this  Supplemental  Indenture shall bind its successors.  All agreements of
the Trustee in this Supplemental Indenture shall bind its successors.


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         SECTION 5.06.    MODIFICATION  OF NOTES.  In order to give  effect to
this Supplemental Indenture,  the modification,  annotation and/or exchange of
the Notes shall be evidenced by a substitution of the relevant page thereto.

         SECTION 5.07.    GOVERNING LAW. THIS  SUPPLEMENTAL  INDENTURE AND THE
NOTES WILL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE  WITH,  THE LAWS OF THE
STATE OF NEW YORK.

         SECTION 5.08.    MULTIPLE ORIGINALS.  The parties may sign any number
of  copies  of this  Supplemental  Indenture.  Each  signed  copy  shall be an
original,  but all of them together  represent the same agreement.  One signed
copy is enough to prove this Supplemental Indenture.

         SECTION 5.09.    SEPARABILITY  CLAUSE.  In case any provision in this
Supplemental   Indenture   or  the  Notes   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 5.10.    TRUSTEE.  The Trustee makes no representations as to
the validity or sufficiency of this Supplemental  Indenture.  The recitals and
statements  herein are deemed to be those of Successor and MeriStar and not of
the Trustee.



                           [Signature page follows]





                  IN WITNESS WHEREOF, the undersigned, being duly authorized,
have executed this Supplemental Indenture on behalf of the respective parties
hereto as of the date first above written.





                                        MERISTAR HOSPITALITY CORPORATION


                                        By: /s/ Bruce G. Wiles
                                            -----------------------------------
                                            Name:   Bruce G. Wiles
                                            Title:  President






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                                        ALCOR ACQUISITION LLC



                                        By: /s/ Kenneth A. Caplan
                                            -----------------------------------
                                            Name:   Kenneth A. Caplan
                                            Title:  Managing Director and
                                                    Vice President




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                                        U.S. BANK TRUST NATIONAL ASSOCIATION,
                                        as Trustee


                                        By /s/ Angelita Pena
                                           ------------------------------------
                                           Name:  Angelita Pena
                                           Title: Assistant Vice President