title: Progress in phenylketonuria: defects in the metabolism of biopterin.
mesh_terms: D001708:Biopterins / Q000378:metabolism*; D002648:Child; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010649:Phenylalanine / Q000097:blood*; D010661:Phenylketonurias / Q000378:metabolism* / Q000652:urine; D011621:Pteridines / Q000378:metabolism*
chemical_list: D011621:Pteridines; D001708:Biopterins; D010649:Phenylalanine