3H55 CRYSTAL STRUCTURE OF HUMAN ALPHA-N-ACETYLGALACTOSAMINIDASE, COMPLEX WITH GALACTOSE HYDROLASE, GLYCOPROTEIN, CARBOHYDRATE-BINDING PROTEIN, GLYCOSIDASE, LYSOSOMAL ENZYME, (BETA/ALPHA)8 BARREL, PROTEIN-LIGAND COMPLEX, DISEASE MUTATION, DISULFIDE BOND, LYSOSOME