Reaction catalyzed by plant 3beta-hydroxysteroid-4alpha-carboxylate 3-dehydrogenase (decarboxylating) (1.1.1.418)
+
NAD+
=
+
+
NADH
+
4alpha-carboxy-4beta,14alpha-dimethyl-9beta,19-cycloergost-24(241)-en-3beta-ol
+
NAD+
=
4alpha,14alpha-dimethyl-9beta,19-cyclo-ergost-24(241)-en-3-one
+
CO2
+
NADH
+
H+
