title: Protein deficiency in PKU.
mesh_terms: D000328:Adult; D001708:Biopterins / Q000172:deficiency* / Q000378:metabolism; D002648:Child; D006801:Humans; D008099:Liver / Q000378:metabolism; D010649:Phenylalanine / Q000097:blood; D010661:Phenylketonurias / Q000209:etiology*; D011621:Pteridines / Q000172:deficiency*
chemical_list: D011621:Pteridines; D001708:Biopterins; D010649:Phenylalanine