. "The human lysosomal enzyme is involved in the degradation of blood type A epitope." . . . "Alpha-N-acetylgalactosaminidase" . "Alpha-galactosidase B" . "Alpha-GalNAcase" . "Alpha-NAGA" . "Cleavage of non-reducing alpha-(1->3)-N-acetylgalactosamine residues from human blood group A and AB mucin glycoproteins, Forssman hapten and blood group A lacto series glycolipids." .