0000950134-08-022343 Sample Contracts

REGISTRATION RIGHTS AGREEMENT

Registration Rights Agreement • December 18th, 2008 • Ardea Biosciences, Inc./De • Pharmaceutical preparations

• Contract Type
  Registration Rights Agreement
• Filed
  December 18th, 2008
• Company
  Ardea Biosciences, Inc./De
• Industry
  Pharmaceutical preparations

This Registration Rights Agreement (this “Agreement”) is made and entered into as of December 17, 2008, by and among Ardea Biosciences, Inc., a Delaware corporation (the “Company”), and the several purchasers signatory hereto (each a “Purchaser” and collectively, the “Purchasers”).

SECURITIES PURCHASE AGREEMENT

Securities Purchase Agreement • December 18th, 2008 • Ardea Biosciences, Inc./De • Pharmaceutical preparations • New York

• Contract Type
  Securities Purchase Agreement
• Filed
  December 18th, 2008
• Company
  Ardea Biosciences, Inc./De
• Industry
  Pharmaceutical preparations
• Jurisdiction
  New York

This Securities Purchase Agreement (this “Agreement”) is dated as of December 17, 2008, by and among Ardea Biosciences, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively, the “Purchasers”).

ARDEA BIOSCIENCES, INC. WARRANT TO PURCHASE COMMON STOCK

Warrant Agreement • December 18th, 2008 • Ardea Biosciences, Inc./De • Pharmaceutical preparations • California

• Contract Type
  Warrant Agreement
• Filed
  December 18th, 2008
• Company
  Ardea Biosciences, Inc./De
• Industry
  Pharmaceutical preparations
• Jurisdiction
  California

This Certifies That, for value received, [ ], or assigns (the “Holder”), is entitled to subscribe for and purchase at the Exercise Price (defined below) from Ardea Biosciences, Inc., a Delaware corporation, with its principal office at 4939 Directors Place, San Diego, CA 92121 (the “Company”) up to [ ] shares of the common stock of the Company, par value $0.001 per share (the “Common Stock”).