Fig. 7

Proposed interactions between ligand and active site residues of α-GalNAcase I and II. The α-GalNAc ligand was placed on the center of active site and the interactions between ligand and active site residues were analyzed by software ACDLabs Free software 5.0. The ligand is surrounded by amino acid side chains labeled in the active site of α-GalNAcase I a and α-GalNAcase II b. The hydrogen bond and polar interactions are shown in red and hydrophobic interactions are shown in blue