title: Deficiency of tyrosine hydroxylase or tryptophan hydroxylase: a possible cause of two hypothetical metabolic diseases.
mesh_terms: D006801:Humans; D010661:Phenylketonurias / Q000209:etiology* / Q000378:metabolism; D014365:Tryptophan Hydroxylase / Q000172:deficiency*; D014446:Tyrosine 3-Monooxygenase / Q000172:deficiency*
chemical_list: D014446:Tyrosine 3-Monooxygenase; D014365:Tryptophan Hydroxylase