Untitled Document

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, each of the undersigned Reporting Persons hereby agrees to the joint filing, along with all other such Reporting Persons, on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to Class B Common Shares of Transportadora de Gas del Sur S.A., and that this Agreement be included as an Exhibit to such joint filing. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, each of the undersigned hereby executes this Agreement as of this 27th day of February, 2007.

D. E. Shaw Laminar Emerging Markets, L.L.C.

By: D. E. Shaw Laminar Portfolios, L.L.C., as

managing member

By: D. E. Shaw & Co., L.L.C., as managing

member

By: /s/ Julius Gaudio

Julius Gaudio

Managing Director

D. E. Shaw Laminar Portfolios, L.L.C.

By: D. E. Shaw & Co., L.L.C., as

managing member

By: /s/ Julius Gaudio

Julius Gaudio

Managing Director

D. E. Shaw & Co., L.L.C.

By: /s/ Julius Gaudio

Julius Gaudio

Managing Director

D. E. Shaw & Co., L.P.

By: /s/ Julius Gaudio

Julius Gaudio

Managing Director