Immunogen: A KLH-linked peptide (AENPEYLGLDVPV) corresponding to aa1243-1255 from the human c-erbB-2/HER-2/neu oncoprotein. Percent identity by BLAST analysis: Human, Gorilla, Gibbon, Monkey, Marmoset, Mouse, Rat, Hamster, Panda, Dog, Horse, Pig (100%); Elephant, Bat, Bovine (92%); Opossum (85%).