2.7.1.157 ATP + N-acetyl-alpha-D-galactosamine = ADP + N-acetyl-alpha-D-galactosamine 1-phosphate - - 2.7.1.157 ATP + N-acetyl-alpha-D-galactosamine = ADP + N-acetyl-alpha-D-galactosamine 1-phosphate ATP hydrolysis and methanolysis reaction pathways, overview 704525 2.7.1.157 ATP + N-acetyl-alpha-D-galactosamine = ADP + N-acetyl-alpha-D-galactosamine 1-phosphate ordered ternary complex reaction mechanism, in which ATP binds first, overview. Ionizable residues play a role in substrate binding and catalysis 709300