Immunogen: Synthetic peptide C-EAFLNSQKAGKEKD from an internal region of human CBX3 (NP_009207.2; NP_057671.2). Percent identity by BLAST analysis: Human, Gorilla, Orangutan, Gibbon, Monkey, Marmoset, Mouse, Rat, Hamster, Panda, Bovine, Dog, Bat, Horse, Rabbit, Pig, Opossum (100%); Turkey, Chicken, Platypus, Lizard, Xenopus, Frog (93%).