Reaction catalyzed by blood-group-substance endo-1,4-beta-galactosidase (3.2.1.102)

		+		H2O	=			+
	Galalpha1-3Galbeta1-4GlcNAcbeta1-3Galbeta1-4Glc	+		H2O	=		Galalpha1-3Galbeta	+		GlcNAcbeta1-3Galbeta1-4Glc