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Y+L amino acid
transporter 1
4F2
cell-surface
antigen heavy
chain
Aspartate
aminotransferase,
cytoplasmic
L-amino-acid
oxidase
Tyrosine
aminotransferase
Phenylalanine-
4-hydroxylase
Aspartate
aminotransferase,
cytoplasmic
Tyrosine
aminotransferase
L-amino-acid
oxidase
Tyrosine--tRNA
ligase,
cytoplasmic
Phenylalanine-
-tRNA ligase
4-
hydroxyphenylpyruvate
dioxygenase
Homogentisate
1,2-dioxygenase
Maleylacetoacetate
isomerase
Fumarylacetoacetase
L-Tyrosine
Fumaric acid
Acetoacetic acid
L-Phenylalanine
L-Phenylalanine
L-Tyrosine
Oxoglutaric acid
Phenylpyruvic acid
L-Glutamic acid
H
2
O
O
2
NH
3
H
2
O
2
Oxoglutaric acid
L-Glutamic acid
L-erythro-tetrahydrobiopterin
O
2
4a-Hydroxytetrahydrobiopterin
Oxoglutaric acid
4-Hydroxyphenylpyruvic acid
L-Glutamic acid
Oxoglutaric acid
L-Glutamic acid
H
2
O
O
2
NH
3
H
2
O
2
ATP
AMP
PP
i
ATP
AMP
PP
i
O
2
Homogentisic acid
CO
2
O
2
Maleylacetoacetic acid
4-Fumarylacetoacetic acid
H
2
O
Fe2+
Fe3+
Calcium
Magnesium
tRNA(Tyr)
L-Tyrosyl-
tRNA(Tyr)
tRNA(Phe)
L-
Phenylalanyl-
tRNA(Phe)
Catecholamine
Biosynthesis
Tyrosine
Metabolism
Citric Acid
Cycle
Pyridoxal
5'-phosphate
FAD
Pyridoxal
5'-phosphate
Pyridoxal
5'-phosphate
Pyridoxal
5'-phosphate
FAD
Iron
Cytosol
Extracellular Space
Liver Hepatic Cell
Lysosome
Seizures, mental retardation
and intermittent ataxia
(occasional loss of balance
and coordination).
SLC7A7
SLC3A2
GOT1
IL4I1
TAT
PAH
GOT1
TAT
IL4I1
YARS
FARSA
FARSB
HPD
HGD
GSTZ1
FAH
L-Tyrosine
Fumaric acid
Acetoacetic
acid
L-Phenylalanine
L-Phenylalanine
L-Tyrosine
Oxoglutaric
acid
Phenylpyruvic
acid
L-Glutamic acid
Water
Oxygen
Ammonia
Hydrogen
peroxide
Oxoglutaric
acid
L-Glutamic acid
L-erythro-
tetrahydrobiopterin
Oxygen
4a-
Hydroxytetrahydrobiopterin
Oxoglutaric
acid
4-
Hydroxyphenylpyruvic
acid
L-Glutamic acid
Oxoglutaric
acid
L-Glutamic acid
Water
Oxygen
Ammonia
Hydrogen
peroxide
Adenosine
triphosphate
Adenosine
monophosphate
Pyrophosphate
Adenosine
triphosphate
Adenosine
monophosphate
Pyrophosphate
Oxygen
Homogentisic
acid
Carbon dioxide
Oxygen
Maleylacetoacetic
acid
4-
Fumarylacetoacetic
acid
Water
tRNA(Tyr)
L-Tyrosyl-
tRNA(Tyr)
tRNA(Phe)
L-
Phenylalanyl-
tRNA(Phe)
Catecholamine
Biosynthesis
Tyrosine
Metabolism
Citric Acid
Cycle