Reaction catalyzed by 20alpha-hydroxysteroid dehydrogenase (1.1.1.149)
+
NAD(P)H
+
=
+
NAD(P)+
5beta-pregnan-3alpha-ol-20-one
+
NAD(P)H
+
H+
=
5alpha-pregnan-3alpha,20alpha-diol
+
NAD(P)+
