title: Alzheimer's disease, Down's syndrome, and chromosome 21.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000235:genetics*; D000682:Amyloid / Q000032:analysis / Q000235:genetics*; D001923:Brain Chemistry; D002891:Chromosomes, Human, Pair 21; D004314:Down Syndrome / Q000235:genetics*; D006801:Humans
chemical_list: D000682:Amyloid