subject area of AUTONOMOUS FOLDING AND COENZYME BINDING OF THE EXCISED PYRIDOXAL 5'-PHOSPHATE BINDING DOMAIN OF ASPARTATE-AMINOTRANSFERASE FROM ESCHERICHIA-COLI Journal Article Two-step Ligand Binding in a (βα)8 Barrel Enzyme SUBSTRATE-BOUND STRUCTURES SHED NEW LIGHT ON THE CATALYTIC CYCLE OF HisA Journal Article