24S-hydroxycholesterol 7-alpha-hydroxylase activity
24s-hydroxycholesterol 7-alpha-hydroxylase activity
Catalysis of the reaction: (24S)-hydroxycholesterol + O2 + reduced [NADPH-hemoprotein reductase] = (24S)-7alpha-dihydroxycholesterol + H+ + H2O + oxidized [NADPH-hemoprotein reductase].