Reaction catalyzed by dTDP-4-dehydro-6-deoxy-alpha-D-glucopyranose 2,3-dehydratase (4.2.1.159)

		=			+		H2O
	dTDP-4-dehydro-6-deoxy-alpha-D-glucopyranose	=		dTDP-3,4-didehydro-2,6-dideoxy-alpha-D-glucose	+		H2O