4alpha-carboxyzymosterol + NADP(+) <=> zymosterone + CO2 + NADPH
4alpha-carboxyzymosterol + nadp(+) <=> zymosterone + co2 + nadph
4alpha-carboxyzymosterol + NADP(+) <=> zymosterone + CO2 + NADPH
4alpha-carboxyzymosterol + nadp(+) <=> zymosterone + co2 + nadph