Tetrahydrobiopterin and "non-responsive" dihydropteridine reductase deficiency.
D001708:Biopterins / Q000031:analogs & derivatives* / Q000627:therapeutic use; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009247:NADH, NADPH Oxidoreductases / Q000172:deficiency*; D010649:Phenylalanine / Q000097:blood; D010661:Phenylketonurias
D001708:Biopterins; D010649:Phenylalanine; D009247:NADH, NADPH Oxidoreductases; C003402:sapropterin