4,4-dimethyl-5alpha-cholesta-8,24-dien-3beta-ol + NADH + O2 + H(+) => 4beta-hydroxymethyl-4alpha-methylzymosterol + NAD(+) + H2O
4,4-dimethyl-5alpha-cholesta-8,24-dien-3beta-ol + nadh + o2 + h(+) => 4beta-hydroxymethyl-4alpha-methylzymosterol + nad(+) + h2o
4,4-dimethyl-5alpha-cholesta-8,24-dien-3beta-ol + NADH + O2 + H(+) => 4beta-hydroxymethyl-4alpha-methylzymosterol + NAD(+) + H2O
4,4-dimethyl-5alpha-cholesta-8,24-dien-3beta-ol + nadh + o2 + h(+) => 4beta-hydroxymethyl-4alpha-methylzymosterol + nad(+) + h2o