EXHIBIT 4.5 THIRD AMENDMENT TO STOCKHOLDER RIGHTS AGREEMENT THIS THIRD AMENDMENT TO STOCKHOLDER RIGHTS AGREEMENT (this "Amendment"), is executed by and between Enchira Biotechnology Corporation (f/k/a Energy BioSystems Corporation), a Delaware...Stockholder Rights Agreement • February 25th, 2002 • Enchira Biotechnology Corp • Services-commercial physical & biological research • Delaware
