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

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