Table of contents : Cover......Page 1 Advances in Enzymology and Related Areas of Molecular Biology Volume 74......Page 2 List of Contributors......Page 3 Title......Page 4 Copyright......Page 5 Contents......Page 6 Preface......Page 7 Abstracts......Page 8 Heterotrophic Assimilation of Carbon Dioxide......Page 14 Phosphotriesterase: An Enzyme in Search of Its Natural Substrate......Page 62 Phosphoribulokinase: Current Perspectives on the Structure/Function Basis for Regulation and Catalysis......Page 105 The Molecular Evolution of Pyridoxal-5'-Phosphate-Dependent Enzymes......Page 138 O-Acetylserine Sulfhydrylase......Page 198 The Aromatic Amino Acid Hydroxylases......Page 252 L-Aspartase: New Tricks from an Old Enzyme......Page 312 Author Index......Page 359 Subject Index......Page 379