Reaction catalyzed by NAD(P)H-hydrate epimerase (5.1.99.6)

		=
	(6R)-6beta-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine dinucleotide phosphate	=		(6S)-6beta-hydroxy-1,4,5,6-tetrahydronicotinamide-adenine dinucleotide phosphate