4alpha-hydroxymethyl-5alpha-cholest-7-en-3beta-ol + 2 Fe(III)-[cytochrome b5] + H2O => 4alpha-methyl-5alpha-cholest-7-en-3beta-ol + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+)
4alpha-hydroxymethyl-5alpha-cholest-7-en-3beta-ol + 2 fe(iii)-[cytochrome b5] + h2o => 4alpha-methyl-5alpha-cholest-7-en-3beta-ol + 2 fe(ii)-[cytochrome b5] + o2 + 2 h(+)
4alpha-hydroxymethyl-5alpha-cholest-7-en-3beta-ol + 2 Fe(III)-[cytochrome b5] + H2O => 4alpha-methyl-5alpha-cholest-7-en-3beta-ol + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+)
4alpha-hydroxymethyl-5alpha-cholest-7-en-3beta-ol + 2 fe(iii)-[cytochrome b5] + h2o => 4alpha-methyl-5alpha-cholest-7-en-3beta-ol + 2 fe(ii)-[cytochrome b5] + o2 + 2 h(+)