Sterol ring B, C, D modification

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Part of cholesterol biosynthesis

© IUBMB 2001

For details of steroid numbering see the Nomenclature of steroids 3S-1.1.

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calciferol biosynthesis
EC 7-dehydrocholesterol reductase
EC Δ14 sterol reductase
EC sterol 14α-demethylase
EC sterol 14α-demethylase (ferredoxin)
EC Δ7-sterol 5(6)-desaturase
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EC cholestenol Δ-isomerase