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homoserine
O-trans-
acetylase
O-
acetylhomoserine
(thiol)-lyase
cystathionine
beta-synthase
cystathionine
gamma-lyase
Homoserine
dehydrogenase
aspartic beta
semi-aldehyde
dehydrogenase
aspartokinase
cystathionine
gamma-lyase
cystathionine
beta-lyase
cystathionine
beta-lyase
subunit 2
L-Homoserine
Acetyl-CoA
CoA
Acetylhomoserine
Hydrogen
sulfide
Acetic acid
H
+
Homocysteine
L-Serine
H
2
O
L-Cystathionine
H
2
O
Ammonium
L-Cysteine
2-Ketobutyric
acid
NADPH
L-Aspartate-
semialdehyde
H
+
NADP
L-Aspartyl-4-
phosphate
H
+
NADPH
P
i
NADP
ATP
L-Aspartic acid
ADP
Hydrogen
sulfide
H
+
2-aminoprop-
2-enoate
2-
iminopropanoate
H
2
O
H
+
Ammonium
Pyruvic acid
Pyruvic acid
Ammonium
H
2
O
Acetylhomoserine
Acetic acid
H
+
Endocytosis
MET2
MET17
CYS4
CYS3
HOM6
HOM2
HOM3
CYS3
IRC7
STR3
L-Homoserine
Acetyl-CoA
Coenzyme A
Acetylhomoserine
Hydrogen
sulfide
Acetic acid
Hydrogen Ion
Homocysteine
L-Serine
Water
L-Cystathionine
Water
Ammonium
L-Cysteine
2-Ketobutyric
acid
NADPH
L-Aspartate-
semialdehyde
Hydrogen Ion
NADP
L-Aspartyl-4-
phosphate
Hydrogen Ion
NADPH
Phosphate
NADP
Adenosine
triphosphate
L-Aspartic acid
Adenosine
diphosphate
Hydrogen
sulfide
Hydrogen Ion
2-aminoprop-
2-enoate
2-
iminopropanoate
Water
Hydrogen Ion
Ammonium
Pyruvic acid
Pyruvic acid
Ammonium
Water
Acetylhomoserine
Acetic acid
Hydrogen Ion
Endocytosis