24-Methylenecycloartanol → Cycloeucalenol
Cycloartenol + S-Adenosylmethionine → 24-Methylenecycloartanol + S-Adenosylhomocysteine
4,4-Dimethylcholesta-8,14,24-trienol + Hydrogen Ion + NADPH → 4,4-Dimethyl-5a-cholesta-8,24-dien-3-b-ol + NADP
Lanosterol + 3 Oxygen + 3 [Reduced NADPH---hemoprotein reductase] → 4,4-Dimethylcholesta-8,14,24-trienol + Formic acid + 4 Water + 3 [Oxidized NADPH---hemoprotein reductase]
(S)-2,3-Epoxysqualene → Cycloartenol
4,4-Dimethyl-5a-cholesta-8,24-dien-3-b-ol + Hydrogen Ion + NADPH ↔ 4,4-Dimethyl-5a-cholesta-8-en-3b-ol + NADP
Hydrogen Ion + Lanosterol + NADPH ↔ 24,25-Dihydrolanosterol + NADP
Hydrogen Ion + NADPH + Oxygen + β-Sitosterol → NADP + Stigmasterol + 2 Water
Hydrogen Ion + NADPH + Zymosterol intermediate 2 ↔ 5a-Cholest-8-en-3b-ol + NADP
Zymosterol intermediate 2 → 5a-Cholesta-7,24-dien-3b-ol
3beta-hydroxysteroid-dehydrogenase/decarboxylase isoform 2
24-Methylenecholesterol + Hydrogen Ion + NADPH → 24-epi-Campesterol + NADP
24-Methylenecholesterol + Hydrogen Ion + NADPH → Campesterol + NADP
24-epi-Campesterol + Hydrogen Ion + NADPH + Oxygen → Brassicasterol + NADP + 2 Water
Avenasterol + Hydrogen Ion + NADPH → NADP + β-Sitosterol
5-Dehydroepisterol → 24-Methylenecholesterol
Episterol + 2 Hydrogen Ion + Oxygen + 2 ferrocytochrome b5 → 5-Dehydroepisterol + 2 Water + 2 ferricytochrome b5
4a-Methylfecosterol → 24-Methylenelophenol
2 Hydrogen Ion + Oxygen + 2 ferrocytochrome b5 + δ7-Avenasterol → 5-Dehydroavenasterol + 2 Water + 2 ferricytochrome b5
24-Ethylidenelophenol → δ7-Avenasterol
Obtusifoliol + 3 Oxygen + 3 [Reduced NADPH---hemoprotein reductase] → Formic acid + 4 Water + 3 [Oxidized NADPH---hemoprotein reductase] + δ 8,14 -Sterol
24-Methylenelophenol + S-Adenosylmethionine → 24-Ethylidenelophenol + S-Adenosylhomocysteine
Hydrogen Ion + NADPH + δ 8,14 -Sterol → 4a-Methylfecosterol + NADP
4a-Methylzymosterol → Zymosterol intermediate 2
4a-Methylzymosterol-4-carboxylic acid + NADP → 3-Keto-4-methylzymosterol + Carbon dioxide + Hydrogen Ion + NADPH
4,4-Dimethyl-5a-cholesta-8,24-dien-3-b-ol + 6 Hydrogen Ion + 3 Oxygen + 6 ferrocytochrome b5 → 4a-Methylzymosterol-4-carboxylic acid + 4 Water + 6 ferricytochrome b5
3-Keto-4-methylzymosterol + Hydrogen Ion + NADPH → 4a-Methylzymosterol + NADP
7-Dehydrocholesterol + Hydrogen Ion + NADPH → Cholesterol + NADP
7-Dehydrodesmosterol + Hydrogen Ion + NADPH ↔ 7-Dehydrocholesterol + NADP
Cholesterol + NADP ↔ Desmosterol + Hydrogen Ion + NADPH
5a-Cholest-8-en-3b-ol → Lathosterol
2 Hydrogen Ion + Lathosterol + Oxygen + 2 ferrocytochrome b5 → 7-Dehydrocholesterol + 2 Water + 2 ferricytochrome b5
Lathosterol + NADP ↔ 5a-Cholesta-7,24-dien-3b-ol + Hydrogen Ion + NADPH
24-methylenesterol C-methyltransferase 2
Probable 3-beta-hydroxysteroid-Delta(8),Delta(7)-isomerase
Hydrogen Ion + NADPH + Presqualene diphosphate → NADP + Pyrophosphate + Squalene
2 Farnesyl pyrophosphate → Presqualene diphosphate + Pyrophosphate
[Oxidized NADPH---hemoprotein reductase]
Oxygen + Squalene + [Reduced NADPH---hemoprotein reductase] → (S)-2,3-Epoxysqualene + Water + [Oxidized NADPH---hemoprotein reductase]