title: Neonatal hyperphenylalaninemia presumably caused by guanosine triphosphate-cyclohydrolase deficiency.
mesh_terms: D000619:Aminohydrolases / Q000172:deficiency*; D001708:Biopterins / Q000031:analogs & derivatives; D006136:GTP Cyclohydrolase / Q000172:deficiency*; D006801:Humans; D007231:Infant, Newborn; D007958:Leukocyte Count; D008099:Liver / Q000201:enzymology; D008297:Male; D019798:Neopterin / Q000031:analogs & derivatives; D010649:Phenylalanine / Q000097:blood*; D011621:Pteridines; D011622:Pterins / Q000652:urine; D013601:T-Lymphocytes
chemical_list: D011621:Pteridines; D011622:Pterins; C000976:7,8-dihydroneopterin; D001708:Biopterins; D010649:Phenylalanine; D019798:Neopterin; C016727:sepiapterin; D000619:Aminohydrolases; D006136:GTP Cyclohydrolase; C003402:sapropterin