4alpha-carboxyzymosterol + NAD(+) <=> zymosterone + CO2 + NADH
4alpha-carboxyzymosterol + nad(+) <=> zymosterone + co2 + nadh
4alpha-carboxyzymosterol + NAD(+) <=> zymosterone + CO2 + NADH
4alpha-carboxyzymosterol + nad(+) <=> zymosterone + co2 + nadh