4alpha-carboxy-ergosta-7,24(24(1))-dien-3beta-ol + 2 Fe(III)-[cytochrome b5] + H2O => 4alpha-formyl-ergosta-7,24(24(1))-dien-3beta-ol + 2 Fe(II)-[cytochrome b5] + O2 + H(+)
4alpha-carboxy-ergosta-7,24(24(1))-dien-3beta-ol + 2 fe(iii)-[cytochrome b5] + h2o => 4alpha-formyl-ergosta-7,24(24(1))-dien-3beta-ol + 2 fe(ii)-[cytochrome b5] + o2 + h(+)
4alpha-carboxy-ergosta-7,24(24(1))-dien-3beta-ol + 2 Fe(III)-[cytochrome b5] + H2O => 4alpha-formyl-ergosta-7,24(24(1))-dien-3beta-ol + 2 Fe(II)-[cytochrome b5] + O2 + H(+)
4alpha-carboxy-ergosta-7,24(24(1))-dien-3beta-ol + 2 fe(iii)-[cytochrome b5] + h2o => 4alpha-formyl-ergosta-7,24(24(1))-dien-3beta-ol + 2 fe(ii)-[cytochrome b5] + o2 + h(+)