Reaction catalyzed by fucosylgalactoside 3-alpha-galactosyltransferase (2.4.1.37)

		+			=			+
	UDP-galactose	+		octyl 4-O-methyl-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside	=		UDP	+		alpha-D-galactosyl-1,3-[4-O-methyl-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3