Reaction catalyzed by UDP-N-acetylbacillosamine N-acetyltransferase (2.3.1.203)

		+			=		CoA	+
	acetyl-CoA	+		UDP-4-amino-4,6-dideoxy-N-acetyl-alpha-D-glucosamine	=		CoA	+		UDP-N,N'-diacetylbacillosamine