Reaction catalyzed by 20alpha-hydroxysteroid dehydrogenase (1.1.1.149)
+
NAD(P)+
=
+
NAD(P)H
+
4-pregnen-20alpha-ol-3-one
+
NAD(P)+
=
4-pregnen-3,20-dione
+
NAD(P)H
+
H+
