Immunogen: Synthetic 16 amino acid peptide from 2nd extracellular domain of human GPR81. Percent identity with other species by BLAST analysis: Human, Gorilla, Monkey, Marmoset, Rat, Dog, Bat, Hamster, Panda, Rabbit, Opossum (100%); Mouse, Horse, Pig, Platypus (94%); Bovine (88%); Elephant (81%).