Reaction catalyzed by 3-deoxy-D-manno-octulosonate aldolase (4.1.2.23), 2-dehydro-3-deoxy-phosphogluconate/2-dehydro-3-deoxy-6-phosphogalactonate aldolase (4.1.2.55)

		+			=
	pyruvate	+		D-glyceraldehyde	=		2-dehydro-3-deoxy-D-galactonate