Immunogen: Synthetic peptide located between aa684-733 of human ACE2 (Q9BYF1, NP_068576). Percent identity by BLAST analysis: Human, Orangutan, Gibbon, Marmoset (100%); Monkey, Galago, Mouse, Rat, Ferret, Panda, Dog, Cat, Bovine, Bat (92%); Horse, Pig, Opossum (85%).