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Alcohol
dehydrogenase
[NADP(+)]
Alcohol
dehydrogenase
[NADP(+)]
Sterol
26-hydroxylase,
mitochondrial
Sterol
26-hydroxylase,
mitochondrial
Sterol
26-hydroxylase,
mitochondrial
Bile acyl-CoA
synthetase
Alpha-
methylacyl- CoA
racemase
Peroxisomal
acyl-coenzyme A
oxidase 2
Peroxisomal
multifunctional
enzyme type 2
Non-specific
lipid-transfer
protein
Bile
acid-CoA:amino
acid N-
acyltransferase
Bile
acid-CoA:amino
acid N-
acyltransferase
Bile acyl-CoA
synthetase
3 beta-
hydroxysteroid
dehydrogenase
type 7
7-alpha-
hydroxycholest-
4-en-3-one
12-alpha-
hydroxylase
Cholesterol
7-alpha-
monooxygenase
Lysosomal acid
lipase/cholesteryl
ester hydrolase
Alcohol
dehydrogenase
[NADP(+)]
Sterol
26-hydroxylase,
mitochondrial
Alcohol
dehydrogenase
[NADP(+)]
Sterol
26-hydroxylase,
mitochondrial
Sterol
26-hydroxylase,
mitochondrial
Bile acyl-CoA
synthetase
Alpha-
methylacyl- CoA
racemase
Peroxisomal
acyl-coenzyme A
oxidase 2
Peroxisomal
multifunctional
enzyme type 2
Bile
acid-CoA:amino
acid N-
acyltransferase
Bile
acid-CoA:amino
acid N-
acyltransferase
Bile acyl-CoA
synthetase
Cholesterol
24-hydroxylase
24-
hydroxycholesterol
7-alpha-
hydroxylase
25-
hydroxycholesterol
7-alpha-
hydroxylase
25-
hydroxycholesterol
7-alpha-
hydroxylase
Cholesterol
7-alpha-
monooxygenase
25-
hydroxycholesterol
7-alpha-
hydroxylase
Sterol
26-hydroxylase,
mitochondrial
25-
hydroxycholesterol
7-alpha-
hydroxylase
3 beta-
hydroxysteroid
dehydrogenase
type 7
Peroxisomal
multifunctional
enzyme type 2
Non-specific
lipid-transfer
protein
Cholesterol
25-hydroxylase
3 beta-
hydroxysteroid
dehydrogenase
type 7
Peroxisomal
multifunctional
enzyme type 2
Dissipation
Cholesterol
Dissipation
Cholesterol
Dissipation
Cholesterol
Taurochenodesoxycholic acid
Chenodeoxycholic acid glycine
conjugate
Chenodeoxycholic acid
Lithocholyltaurine
Lithocholic acid glycine
conjugate
Lithocholic acid
Taurocholic acid
Glycocholic acid
Cholic acid
Taurodeoxycholic acid
Deoxycholic acid glycine
conjugate
Deoxycholic acid
Dissipation
Cholesterol
CE(22:2(13Z,16Z))
CE(22:2(13Z,16Z))
7a-Hydroxy-5b-cholestan-3-one
NAD
3a,7a-Dihydroxy-5b-cholestane
NADP
7a-Hydroxy-cholestene-3-one
NADPH
NADP
NADPH
O
2
3 α,7
α,26-Trihydroxy-5β-cholestane
NADP
H
2
O
3a,7a-Dihydroxy-5b-
cholestan-26-al
3α,7α-Dihydroxycoprostanic
acid
ATP
CoA
3a,7a-Dihydroxy-5b-
cholestanoyl-CoA
PP
i
AMP
3a,7a-Dihydroxy-5b-
cholestanoyl-CoA
H
2
O
3a,7a-Dihydroxy-5b-cholest-
24-enoyl-CoA
3 α,7 α,24-Trihydroxy-5β-
cholestanoyl-CoA
Chenodeoxycholoyl-CoA
H
2
O
Propionyl-CoA
Chenodeoxycholoyl-CoA
CoA
Taurine
Glycine
Glycocholic acid
ATP
Cholic acid
AMP
PP
i
7a-Hydroxycholesterol
NAD
NADH
NADPH
O
2
7a,12a-Dihydroxy-cholestene-
3-one
NADP
H
2
O
NADPH
O
2
NADP
H
2
O
H
2
O
Palmitic acid
NADPH
7a,12a-Dihydroxy-5b-
cholestan-3-one
NADP
5-b-Cholestane-3a ,7a
,12a-triol
NADPH
O
2
27-Deoxy-5b-cyprinol
NADP
H
2
O
NADP
NADPH
5b-Cyprinol sulfate
NADPH
O
2
3a,7a,12a-Trihydroxy-5b-
cholestan-26-al
NADP
H
2
O
3α,7α,12α-Trihydroxy-5β-
cholestanoic acid
ATP
CoA
3a,7a,12a-Trihydroxy-5b-24-
oxocholestanoyl-CoA
ADP
PP
i
3a,7a,12a-Trihydroxy-5b-24-
oxocholestanoyl-CoA
H
2
O
3a,7a,12a-Trihydroxy-5b-
cholest-24-enoyl-CoA
3a,7a,12a,24-Tetrahydroxy-
5b-cholestanoyl-CoA
NAD
3a,7a,12a-Trihydroxy-5b-24-
oxocholestanoyl-CoA
NADH
Choloyl-CoA
Taurine
CoA
Glycine
CoA
AMP
PP
i
ATP
CoA
NADPH
O
2
24-Hydroxycholesterol
NADP
H
2
O
NADPH
O
2
(24R)-Cholest-5-ene-3-β,7-
α,24-triol
NADP
H
2
O
25-Hydroxycholesterol
NADPH
O
2
7-a,25-Dihydroxycholesterol
NADP
H
2
O
NADPH
O
2
27-Hydroxycholesterol
NADP
H
2
O
NADPH
O
2
7-a,27-Dihydroxycholesterol
NADP
H
2
O
NADPH
O
2
NADP
H
2
O
NADPH
O
2
3 β-Hydroxy-5-cholestenoate
NADP
H
2
O
NADPH
O
2
3β,7α-Dihydroxy-5-
cholestenoate
NADP
H
2
O
NAD
7α-Hydroxy-3-oxo-4-
cholestenoate
NADH
H
2
O
CoA
Propionyl-CoA
O
2
H
2
O
NADP
7 α,26-Dihydroxy-4-cholesten-
3-one
NADPH
H
2
O
Heme
Heme
FAD
Heme
Heme
Heme
Heme
FAD
Heme
Acceptor
Reduced
acceptor
AH2
A
Steroid
Biosynthesis
Steroid
Biosynthesis
Steroid
Biosynthesis
Heme
Heme
Heme
Heme
Heme
Heme
Heme
Heme
Heme
Iron
Extracellular space
Intracellular space
Endoplasmic Reticulum
Endoplasmic Reticulum
Endoplamic Reticulum
Endoplasmic Reticulum
Mitochondria
Liver
Mitochondria
Blood Vesicle
Lysosome
Liver Hepatic Cell
Peroxisome
Peroxisome
Akr1a1
Akr1a1
Cyp27a1
Cyp27a1
Cyp27a1
Slc27a5
Amacr
Acox2
Hsd17b4
Scp2
Baat
Baat
Slc27a5
Hsd3b7
Cyp8b1
Cyp7a1
Lipa
Akr1a1
Cyp27a1
Akr1a1
Cyp27a1
Cyp27a1
Slc27a5
Amacr
Acox2
Hsd17b4
Baat
Baat
Slc27a5
Cyp46a1
Cyp39a1
Cyp7b1
Cyp7b1
Cyp7a1
Cyp7b1
Cyp27a1
Cyp7b1
Hsd3b7
Hsd17b4
Scp2
Ch25h
Hsd3b7
Hsd17b4
Dissipation
Cholesterol
Dissipation
Cholesterol
Dissipation
Cholesterol
Taurochenodesoxycholic
acid
Chenodeoxycholic
acid glycine
conjugate
Chenodeoxycholic
acid
Lithocholyltaurine
Lithocholic
acid glycine
conjugate
Lithocholic
acid
Taurocholic
acid
Glycocholic
acid
Cholic acid
Taurodeoxycholic
acid
Deoxycholic
acid glycine
conjugate
Deoxycholic
acid
Dissipation
Cholesterol
CE(22:2(13Z,16Z))
CE(22:2(13Z,16Z))
7a-Hydroxy-
5b-cholestan-
3-one
NAD
3a,7a-
Dihydroxy-5b-
cholestane
NADP
7a-Hydroxy-
cholestene-3-
one
NADPH
NADP
NADPH
Oxygen
3 α,7 α,26-
Trihydroxy-
5β-cholestane
NADP
Water
3a,7a-
Dihydroxy-5b-
cholestan-26-
al
3α,7α-
Dihydroxycoprostanic
acid
Adenosine
triphosphate
Coenzyme A
3a,7a-
Dihydroxy-5b-
cholestanoyl-
CoA
Pyrophosphate
3'-AMP
3a,7a-
Dihydroxy-5b-
cholestanoyl-
CoA
Water
3a,7a-
Dihydroxy-5b-
cholest-24-
enoyl-CoA
3 α,7 α,24-
Trihydroxy- 5β-
cholestanoyl-
CoA
Chenodeoxycholoyl-
CoA
Water
Propionyl-CoA
Chenodeoxycholoyl-
CoA
Coenzyme A
Taurine
Glycine
Glycocholic
acid
Adenosine
triphosphate
Cholic acid
3'-AMP
Pyrophosphate
7a-
Hydroxycholesterol
NAD
NADH
NADPH
Oxygen
7a,12a-
Dihydroxy-
cholestene-3-
one
NADP
Water
NADPH
Oxygen
NADP
Water
Water
Palmitic acid
NADPH
7a,12a-
Dihydroxy-5b-
cholestan-3-
one
NADP
5-b-
Cholestane-3a
,7a ,12a-triol
NADPH
Oxygen
27-Deoxy-5b-
cyprinol
NADP
Water
NADP
NADPH
5b-Cyprinol
sulfate
NADPH
Oxygen
3a,7a,12a-
Trihydroxy-
5b-cholestan-
26-al
NADP
Water
3α,7α,12α-
Trihydroxy- 5β-
cholestanoic
acid
Adenosine
triphosphate
Coenzyme A
3a,7a,12a-
Trihydroxy-
5b-24-
oxocholestanoyl-
CoA
Adenosine
diphosphate
Pyrophosphate
3a,7a,12a-
Trihydroxy-
5b-24-
oxocholestanoyl-
CoA
Water
3a,7a,12a-
Trihydroxy-
5b-cholest-
24-enoyl-CoA
3a,7a,12a,24-
Tetrahydroxy-
5b-
cholestanoyl-
CoA
NAD
3a,7a,12a-
Trihydroxy-
5b-24-
oxocholestanoyl-
CoA
NADH
Choloyl-CoA
Taurine
Coenzyme A
Glycine
Coenzyme A
3'-AMP
Pyrophosphate
Adenosine
triphosphate
Coenzyme A
NADPH
Oxygen
24-
Hydroxycholesterol
NADP
Water
NADPH
Oxygen
(24R)-
Cholest-5-
ene-3-β,7-
α,24-triol
NADP
Water
25-
Hydroxycholesterol
NADPH
Oxygen
7-a,25-
Dihydroxycholesterol
NADP
Water
NADPH
Oxygen
27-
Hydroxycholesterol
NADP
Water
NADPH
Oxygen
7-a,27-
Dihydroxycholesterol
NADP
Water
NADPH
Oxygen
NADP
Water
NADPH
Oxygen
3 β-Hydroxy-5-
cholestenoate
NADP
Water
NADPH
Oxygen
3β,7α-
Dihydroxy-5-
cholestenoate
NADP
Water
NAD
7α-Hydroxy-3-
oxo-4-
cholestenoate
NADH
Water
Coenzyme A
Propionyl-CoA
Oxygen
Water
NADP
7 α,26-
Dihydroxy-4-
cholesten-3-
one
NADPH
Water
Acceptor
Reduced
acceptor
AH2
A
Steroid
Biosynthesis
Steroid
Biosynthesis
Steroid
Biosynthesis
Intestinal
Microflora
Intestinal
Microflora