title: Effects of tyrosine administration on plasma biopterin in patients with juvenile parkinsonism and their relatives.
mesh_terms: D000328:Adult; D001708:Biopterins / Q000097:blood*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010300:Parkinson Disease / Q000097:blood / Q000235:genetics*; D010375:Pedigree; D014443:Tyrosine / Q000097:blood
chemical_list: D001708:Biopterins; D014443:Tyrosine