Immunogen: Synthetic peptide C-DLYQRQTHEYY from an internal region of human SPI1 / PU.1 (NP_001074016.1; NP_003111.2). Percent identity by BLAST analysis: Human, Gorilla, Gibbon, Monkey, Panda, Bovine, Dog, Horse, Rabbit, Pig (100%); Marmoset, Opossum (91%); Rat, Platypus (82%).