Reaction catalyzed by UDP-N-acetylglucosamine 4,6-dehydratase (configuration-inverting) (4.2.1.115)

2		=			+			+	2	H2O
	2 UDP-N-acetylglucosamine	=		UDP-2-acetamido-2,6-dideoxy-beta-L-arabino-4-hexulose	+		UDP-2-acetamido-2,6-dideoxy-alpha-D-xylo-4-hexulose	+		2 H2O