Common Contracts

Exhibit 4.3 TULARIK INC. INVESTOR RIGHTS AGREEMENT October 31, 1997 TABLE OF CONTENTS

Rights Agreement • October 15th, 1999 • Tularik Inc • Delaware

• Contract Type
  Rights Agreement
• Filed
  October 15th, 1999
• Company
  Tularik Inc
• Jurisdiction
  Delaware

ARTICLE 1

Rights Agreement • May 6th, 1999 • Bigstar Entertainment Inc /Ny • New York

• Contract Type
  Rights Agreement
• Filed
  May 6th, 1999
• Company
  Bigstar Entertainment Inc /Ny
• Jurisdiction
  New York