Immunogen: Synthetic 20 amino acid peptide from 3rd extracellular domain of human CCKBR. Percent identity with other species by BLAST analysis: Human (100%); Gorilla, Orangutan, Gibbon, Monkey, Marmoset, Mouse, Hamster, Elephant, Bat, Bovine, Dog, Horse, Rabbit (95%); Rat (90%); Panda (85%).