Reaction catalyzed by rhamnopyranosyl-N-acetylglucosaminyl-diphospho-decaprenol beta-1,4/1,5-galactofuranosyltransferase (2.4.1.287)

2		+			=	2		+
	2 UDP-alpha-D-galactofuranose	+		alpha-L-rhamnopyranosyl-(1->3)-N-acetyl-alpha-D-glucosaminyl-diphospho-trans,octacis-decaprenol	=		2 UDP	+		beta-D-galactofuranosyl-(1->5)-beta-D-galactofuranosyl-(1->4)-alpha-L-rhamnopyranosyl-(1->3)-N-acetyl-alpha-D-glucosaminyl-diphospho-trans,octacis-decaprenol