Reaction catalyzed by undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase (2.4.2.53)

		+			=			+
	UDP-4-deoxy-4-formamido-beta-L-arabinopyranose	+		ditrans,polycis-undecaprenyl phosphate	=		UDP	+		4-deoxy-4-formamido-alpha-L-arabinopyranosyl ditrans,polycis-undecaprenyl phosphate