Immunogen: Synthetic peptide located between aa300-349 of human PSEN1 (P49768, NP_000012). Percent identity by BLAST analysis: Human, Chimpanzee, Gorilla, Orangutan, Gibbon, Monkey, Marmoset, Guinea pig (100%); Opossum (92%); Mouse, Hamster, Elephant, Dog, Bovine, Bat, Horse, Pig (85%); Rat (84%).