title: [Parkinson's disease].
mesh_terms: D000368:Aged; D001708:Biopterins / Q000031:analogs & derivatives / Q000096:biosynthesis; D001921:Brain / Q000201:enzymology; D002395:Catecholamines / Q000378:metabolism; D004296:Dopa Decarboxylase / Q000378:metabolism; D006801:Humans; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy / Q000201:enzymology*; D011954:Receptors, Dopamine / Q000378:metabolism; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism
chemical_list: D002395:Catecholamines; D011954:Receptors, Dopamine; D001708:Biopterins; D014446:Tyrosine 3-Monooxygenase; D004296:Dopa Decarboxylase; C003402:sapropterin