title: Biochemical changes in normal aging in human brain.
mesh_terms: D000110:Acetylcholinesterase / Q000378:metabolism; D000222:Adaptation, Physiological; D012437:Adenosylmethionine Decarboxylase / Q000378:metabolism; D000328:Adult; D000368:Aged; D000375:Aging; D001921:Brain / Q000378:metabolism*; D002091:Butyrylcholinesterase / Q000378:metabolism; D002395:Catecholamines / Q000378:metabolism; D004296:Dopa Decarboxylase / Q000378:metabolism; D005968:Glutamate Decarboxylase / Q000378:metabolism; D006801:Humans; D008543:Melanins / Q000378:metabolism; D008875:Middle Aged; D018377:Neurotransmitter Agents / Q000378:metabolism; D009955:Ornithine Decarboxylase / Q000378:metabolism; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D002395:Catecholamines; D008543:Melanins; D018377:Neurotransmitter Agents; C014121:neuromelanin; D005680:gamma-Aminobutyric Acid; D014446:Tyrosine 3-Monooxygenase; D000110:Acetylcholinesterase; D002091:Butyrylcholinesterase; D004296:Dopa Decarboxylase; D005968:Glutamate Decarboxylase; D009955:Ornithine Decarboxylase; D012437:Adenosylmethionine Decarboxylase