Reaction catalyzed by 2-hydroxy-4-carboxymuconate semialdehyde hemiacetal dehydrogenase (1.1.1.312)

		+		NAD+	=			+		NADH
	4-carboxy-2-hydroxy-cis,cis-muconate 6-semialdehyde	+		NAD+	=		4-carboxy-2-hydroxy-cis,cis-muconate	+		NADH