Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.1 Acting on the CH-OH group of donors
1.1.1 With NAD+ or NADP+ as acceptor
1.1.1.417
R12362 3beta-Hydroxy-4alpha-methylsteroid-4beta-carboxylate + NADP+ <=> 4alpha-Methyl-3-oxosteroid + NADPH + CO2 + H+