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Acetolactate
synthase
isozyme 3 large
subunit
Acetolactate
synthase
isozyme 3 small
subunit
Ketol-acid
reductoisomerase
Dihydroxy-acid
dehydratase
2-
isopropylmalate
synthase
Branched-
chain-amino-
acid
aminotransferase
3-
isopropylmalate
dehydratase
large subunit
3-
isopropylmalate
dehydratase
small subunit
3-
isopropylmalate
dehydratase
large subunit
3-
isopropylmalate
dehydratase
small subunit
Branched-
chain-amino-
acid
aminotransferase
Ketol-acid
reductoisomerase
Pyruvic acid
H
+
CO
2
(S)-2-
Acetolactate
H
+
NADPH
NADP
(R) 2,3-
Dihydroxy-3-
methylvalerate
H
2
O
3-Methyl-2-
oxovaleric acid
H
2
O
Acetyl-CoA
CoA
H
+
2-
Isopropylmalic
acid
L-Glutamic acid
Oxoglutaric
acid
L-Valine
H
2
O
Isopropylmaleate
H
2
O
3-
Isopropylmalate
NAD
NADH
H
+
2-Isopropyl- 3-
oxosuccinate
H
+
CO
2
Ketoleucine
L-Glutamic acid
Oxoglutaric
acid
L-Leucine
3-Hydroxy-3-
methyl-2-
oxobutanoic
acid
Glycolysis and
Pyruvate
Dehydrogenase
D-malate
dehydrogenase
[decarboxylating]
3-
isopropylmalate
dehydrogenase
ilvI
ilvH
ilvC
ilvD
leuA
ilvE
leuC
leuD
leuC
leuD
ilvE
ilvC
Pyruvic acid
Hydrogen Ion
Carbon dioxide
(S)-2-
Acetolactate
Hydrogen Ion
NADPH
NADP
(R) 2,3-
Dihydroxy-3-
methylvalerate
Water
3-Methyl-2-
oxovaleric acid
Water
Acetyl-CoA
Coenzyme A
Hydrogen Ion
2-
Isopropylmalic
acid
L-Glutamic acid
Oxoglutaric
acid
L-Valine
Water
Isopropylmaleate
Water
3-
Isopropylmalate
NAD
NADH
Hydrogen Ion
2-Isopropyl- 3-
oxosuccinate
Hydrogen Ion
Carbon dioxide
Ketoleucine
L-Glutamic acid
Oxoglutaric
acid
L-Leucine
3-Hydroxy-3-
methyl-2-
oxobutanoic
acid
Glycolysis and
Pyruvate
Dehydrogenase
dmlA
leuB