Reaction catalyzed by UDP-Gal:alpha-D-GlcNAc-diphosphoundecaprenol beta-1,4-galactosyltransferase (2.4.1.304)

		+			=			+
	UDP-alpha-D-galactose	+		N-acetyl-alpha-D-glucosaminyl-phospho-phenoxyundecanol	=		UDP	+		beta-D-Gal-(1->4)-N-acetyl-alpha-D-glucosaminyl-phospho-phenoxyundecanol