Reaction catalyzed by 20alpha-hydroxysteroid dehydrogenase (1.1.1.149)
+
NAD(P)+
=
+
NAD(P)H
+
17alpha,20alpha-dihydroxypregn-4-en-3-one
+
NAD(P)+
=
17alpha-hydroxyprogesterone
+
NAD(P)H
+
H+
