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Unknown
Threo-3-
hydroxyaspartate
ammonia-lyase
Putative 2-
hydroxyacyl-
CoA lyase
acetohydroxybutanoate
synthase /
acetolactate
synthase
acetohydroxybutanoate
synthase /
acetolactate
synthase 2
acetohydroxybutanoate
synthase /
acetolactate
synthase 2
Pyruvate
decarboxylase
isozyme 3
acetohydroxy
acid
isomeroreductase
branched-chain
amino-acid
aminotransferase
dihydroxy acid
dehydratase,
mitochondrial
L-Threonine
H
+
H
2
O
(2Z)-2-
aminobut-2-
enoate
2-
iminobutanoate
H
2
O
H
+
Ammonium
2-Ketobutyric
acid
H
+
Pyruvic acid
CO
2
(S)-2-Aceto- 2-
hydroxybutanoic
acid
NADPH
H
+
NADP
(R) 2,3-
Dihydroxy-3-
methylvalerate
3-Methyl-2-
oxovaleric acid
L-Glutamic acid
Oxoglutaric
acid
L-Isoleucine
H
2
O
2-Keto-3-
methyl-
valerate
Threonine
Biosynthesis
Unknown
SRY1
YEL020C
Unknown
Unknown
Unknown
PDC6
Unknown
Unknown
Unknown
L-Threonine
Hydrogen Ion
Water
(2Z)-2-
aminobut-2-
enoate
2-
iminobutanoate
Water
Hydrogen Ion
Ammonium
2-Ketobutyric
acid
Hydrogen Ion
Pyruvic acid
Carbon dioxide
(S)-2-Aceto- 2-
hydroxybutanoic
acid
NADPH
Hydrogen Ion
NADP
(R) 2,3-
Dihydroxy-3-
methylvalerate
3-Methyl-2-
oxovaleric acid
L-Glutamic acid
Oxoglutaric
acid
L-Isoleucine
Water
2-Keto-3-
methyl-
valerate
Threonine
Biosynthesis
SRY1
YEL020C
PDC6
Thr
H
+
H
2
O
22A2E
2ib
H
2
O
H
+
Ammon
2KBA
H
+
Pyr
CO
2
S2A2ha
NADPH
H
+
NADP
R23D3M
3M2Oxva
Glu
AKG
Ile
H
2
O
2K3MVal
PW122449