We thank Tony E. Haynes for assistance in manuscript preparation, Frances Mutscher for office support, and all personnel in our laboratories for their technical assistance.
1 Prepared for the conference "Symposium on Arginine" held April 5–6, 2004, in Bermuda. The conference was sponsored in part by an educational grant from Ajinomoto USA, Inc. Conference proceedings are published as a supplement to The Journal of Nutrition. Guest Editors for the supplement were Sidney M. Morris, Jr., Joseph Loscalzo, Dennis Bier, and Wiley W. Souba.
2 Supported by grants from the U.S. Department of Agriculture (#2001–35203–11247 and #2003–35206–13694), by a Hatch project from the Texas Agricultural Experiment Station (#H-8200), and by funds from Texas Tech University.
4 Abbreviations used: CPS-I, carbamoylphosphate synthase-I; NAG, N-acetylglutamate; NCG, N-carbamoylglutamate; NO, nitric oxide; P5C, pyrroline-5-carboxylate.