Reaction catalyzed by 3(or 17)alpha-hydroxysteroid dehydrogenase (1.1.1.209)

		+		NAD(P)+	=			+		NAD(P)H
	5alpha-androstan-3alpha,17beta-diol	+		NAD(P)+	=		17beta-hydroxy-5alpha-androstan-3-one	+		NAD(P)H