title: Brain histidine decarboxylase activity in Parkinson's disease.
mesh_terms: D001921:Brain / Q000201:enzymology*; D002262:Carboxy-Lyases / Q000378:metabolism*; D006632:Histamine / Q000502:physiology; D006640:Histidine Decarboxylase / Q000378:metabolism*; D006801:Humans; D018377:Neurotransmitter Agents; D010300:Parkinson Disease / Q000201:enzymology*
chemical_list: D018377:Neurotransmitter Agents; D006632:Histamine; D002262:Carboxy-Lyases; D006640:Histidine Decarboxylase