Alcohol
dehydrogenase 1A
Retinol
dehydrogenase 12
Dehydrogenase/reductase
SDR family member
4
Retinol
dehydrogenase 16
Retinol
dehydrogenase 8
Short-chain
dehydrogenase/reductase
3
Dehydrogenase/reductase
SDR family member
9
Retinol
dehydrogenase 11
Lecithin retinol
acyltransferase
Acyl-CoA wax
alcohol
acyltransferase 1
Diacylglycerol
O-acyltransferase
1
Retinoid
isomerohydrolase
Diacylglycerol
O-acyltransferase
1
Acyl-CoA wax
alcohol
acyltransferase 1
Lecithin retinol
acyltransferase
Retinol
dehydrogenase 11
Patatin-like
phospholipase
domain-containing
protein 4
Beta,beta-
carotene 15,15'-
monooxygenase
Retinol
dehydrogenase 11
Retinol
dehydrogenase 11
Dehydrogenase/reductase
SDR family member
4
Retinal
dehydrogenase 1
Retinal
dehydrogenase 2
Retinal
dehydrogenase 1
Retinal
dehydrogenase 2
Cytochrome P450
26A1
All-trans-retinol
13,14-reductase
UDP-
glucuronosyltransferase
1-1
Cytochrome P450
26A1
Cytochrome P450
26A1
Cytochrome P450
26A1
Cytochrome P450
11-cis-
Retinaldehyde
NAD
Retinal
NADH
NADP
NADPH
NADP
NADPH
NADP
NADPH
NADP
11-cis-Retinol
NADPH
PC(24:1(15Z)/15:0)
Retinyl palmitate
Glycerophosphocholine
Acetyl-CoA
CoA
Acetyl-CoA
CoA
Retinyl ester
H2O
Vitamin A
Acetyl-CoA
CoA
Acetyl-CoA
CoA
PC(24:1(15Z)/15:0)
Glycerophosphocholine
NADP
NADPH
DG(16:1(9Z)/22:0/0:0)
TG(16:1(9Z)/22:0/16:1(9Z))
9-cis-Retinol
B-Carotene
O2
NADP
9-cis-Retinal
NADPH
NADP
NADPH
NADP
NADPH
NAD
H2O
9-cis-Retinoic
acid
NADH
NAD
H2O
NADH
NAD
H2O
all-trans-
Retinoic acid
NADH
NAD
H2O
NADH
4-Oxoretinol
All-trans- 13,14-
dihydroretinol
Retinoyl
b-glucuronide
4-Hydroxyretinoic
acid
4-oxo-Retinoic
acid
all-trans-18-
Hydroxyretinoic
acid
all-trans-5,6-
Epoxyretinoic
acid
Zinc
NADP
NAD
NADP
NAD
Fe2+
Heme
Heme
Heme
Heme
Fatty Acid
Reduced
acceptor
Acceptor
Reduced
acceptor
Acceptor
Rhodopsin
Bathorodopsin
iodopsin
Lumirodopsin
Metarodopsin
Heme
NAD
Fe2+
hv
hv
Intracellular Space
Endoplasmic Reticulum