Pyridoxal phosphate
Glutamate dehydrogenase
Carbamoyl phosphate synthase I
Glycine transaminase
Tetrahydrobiopterin
Dopamine
Homogentisate
Malignant carcinoid syndrome
Ornithine decarboxylase
Leucine
Liver
Glycine, Cysteine, Glutamate
Serine
Acetyl CoA
Lysine