Reaction catalyzed by glycoprotein-fucosylgalactoside alpha-N-acetylgalactosaminyltransferase (2.4.1.40)

		+			=			+
	UDP-N-acetylgalactosamine	+		octyl alpha-L-xylo-hexopyranosyl-(1-2)-beta-D-galactopyranoside	=		UDP	+		N-acetyl-alpha-D-galactosaminyl-1,3-[alpha-L-xylo-hexopyranosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3