| Nomenclature | Common name | HGNC, UniProt | EC number | Comment |
| CYP39A1 | – | CYP39A1, Q9NYL5 | 1.14.13.99 | Converts 24-hydroxycholesterol to 7α,24-dihydroxycholesterol 154 |
| CYP46A1 | Cholesterol 24-hydroxylase | CYP46A1, Q9Y6A2 | 1.14.13.98 | Converts cholesterol to 24(S)-hydroxycholesterol |
| CYP51A1 | Lanosterol 14-α-demethylase | CYP51A1, Q16850 | – | Converts lanosterol to 4,4-dimethylcholesta-8.14.24-trienol |
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