2-iminopropanoate + Hydrogen Ion + Water → Ammonium + Pyruvic acid
2-aminoprop-2-enoate → 2-iminopropanoate
Acetyl-CoA + L-Homoserine → Acetylhomoserine + Coenzyme A
Acetylhomoserine + Hydrogen sulfide → Acetic acid + Homocysteine + Hydrogen Ion
Ammonium + Homocysteine + Pyruvic acid → L-Cystathionine + Water
Homocysteine + L-Serine → L-Cystathionine + Water
aspartic beta semi-aldehyde dehydrogenase
Adenosine triphosphate + L-Aspartic acid → Adenosine diphosphate + L-Aspartyl-4-phosphate
L-Cysteine → 2-aminoprop-2-enoate + Hydrogen Ion + Hydrogen sulfide
L-Cystathionine + Water → 2-Ketobutyric acid + Ammonium + L-Cysteine
Acetylhomoserine + L-Cysteine → Acetic acid + Hydrogen Ion + L-Cystathionine
Hydrogen Ion + L-Aspartate-semialdehyde + NADPH → L-Homoserine + NADP
Hydrogen Ion + L-Aspartyl-4-phosphate + NADPH → L-Aspartate-semialdehyde + NADP + Phosphate