Reaction catalyzed by UDP-Gal:alpha-D-GlcNAc-diphosphoundecaprenol beta-1,3-galactosyltransferase (2.4.1.303)

		+			=			+
	UDP-alpha-D-galactose	+		N-acetyl-alpha-D-glucosaminyl-diphospho-ditrans,octacis-undecaprenol	=		UDP	+		beta-D-Gal-beta-(1->3)-alpha-D-GlcNAc-diphospho-ditrans,octacis-undecaprenol