Immunogen: Amino acids 694-711 (RFWYNYRQRKSMDSKGQK) of human Relaxin receptor 1/LGR7 protein were used as the immunogen. Percent identity by BLAST analysis: Human, Orangutan (100%); Gorilla (94%); Gibbon, Monkey (89%); Bovine, Dog, Panda, Horse, Pig (83%).