Reaction catalyzed by alpha-N-acetylgalactosaminidase (3.2.1.49)

		+		H2O	=			+
	alpha-D-GalNAc-(1->3)-beta-D-GalNAc-(1->3)-alpha-D-Gal-(1->4)-beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-ceramide	+		H2O	=		D-GalNAc	+		beta-D-GalNAc-(1->3)-alpha-D-Gal-(1->4)-beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-ceramide