title: Aging and neurotransmitter systems.
mesh_terms: D000110:Acetylcholinesterase / Q000378:metabolism; D000375:Aging; D000818:Animals; D001921:Brain / Q000201:enzymology / Q000254:growth & development*; D002795:Choline O-Acetyltransferase / Q000378:metabolism; D004296:Dopa Decarboxylase / Q000378:metabolism; D005968:Glutamate Decarboxylase / Q000378:metabolism; D018377:Neurotransmitter Agents / Q000502:physiology*; D009928:Organ Specificity; D051381:Rats; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism
chemical_list: D018377:Neurotransmitter Agents; D014446:Tyrosine 3-Monooxygenase; D002795:Choline O-Acetyltransferase; D000110:Acetylcholinesterase; D004296:Dopa Decarboxylase; D005968:Glutamate Decarboxylase