Reaction catalyzed by N-acetylgalactosaminide beta-1,3-galactosyltransferase (2.4.1.122)

		+			=			+
	UDP-alpha-D-galactose	+		alpha-D-GalNAc-OMe	=		UDP	+		alpha-D-Gal-(1->3)-alpha-D-GalNAc-OMe