title: Phenylalanine and tyrosine metabolism in Parkinson's disease treated with levodopa.
mesh_terms: D000328:Adult; D000368:Aged; D004295:Dihydroxyphenylalanine / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000097:blood* / Q000134:cerebrospinal fluid / Q000188:drug therapy; D010649:Phenylalanine / Q000097:blood* / Q000134:cerebrospinal fluid; D013997:Time Factors; D014443:Tyrosine / Q000097:blood* / Q000134:cerebrospinal fluid
chemical_list: D014443:Tyrosine; D010649:Phenylalanine; D004295:Dihydroxyphenylalanine