Reaction catalyzed by cholest-5-ene-3beta,7alpha-diol 3beta-dehydrogenase (1.1.1.181)
+
NAD+
=
+
NADH
+
cholest-5-ene-3beta,7alpha-diol
+
NAD+
=
7alpha-hydroxycholest-4-en-3-one
+
NADH
+
H+
