cholest-4-en-3-one + 2 reduced [2Fe-2S]-[ferredoxin] + O2 + 2 H(+) => (25S)-3-oxocholest-4-en-26-ol + 2 oxidized [2Fe-2S]-[ferredoxin] + H2O
cholest-4-en-3-one + 2 reduced [2fe-2s]-[ferredoxin] + o2 + 2 h(+) => (25s)-3-oxocholest-4-en-26-ol + 2 oxidized [2fe-2s]-[ferredoxin] + h2o