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