Immunogen: Synthetic 16 amino acid peptide from 3rd cytoplasmic domain of human HRH2 / Histamine H2 Receptor. Percent identity with other species by BLAST analysis: Human, Chimpanzee, Gorilla, Orangutan, Gibbon, Monkey (100%); Mouse, Rat, Hamster (94%); Elephant (88%); Dog, Bat, Rabbit, Guinea pig (81%).