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