4beta-methylzymosterol-4alpha-carboxylate + NADP(+) = 3-dehydro-4-methylzymosterol + CO2 + NADPH
4beta-methylzymosterol-4alpha-carboxylate + nadp(+) = 3-dehydro-4-methylzymosterol + co2 + nadph
4beta-methylzymosterol-4alpha-carboxylate + NADP(+) = 3-dehydro-4-methylzymosterol + CO2 + NADPH
4beta-methylzymosterol-4alpha-carboxylate + nadp(+) = 3-dehydro-4-methylzymosterol + co2 + nadph