Immunogen: Synthetic 20 amino acid peptide from C-terminus of human 5HT4 Receptor. Percent identity with other species by BLAST analysis: Human, Gorilla, Gibbon, Monkey, Marmoset, Elephant, Horse, Pig (100%); Panda, Dog, Rabbit (95%); Bat, Bovine (90%); Guinea pig (85%); Mouse, Rat (80%).