Immunogen: Synthetic peptide CVLANWKKKDPNK from an internal region of human IDO1 / IDO (NP_002155.1). Percent identity by BLAST analysis: Human, Gorilla, Monkey, Marmoset (100%); Gibbon, Mouse, Rat, Sheep, Dog, Bovine, Panda (92%); Bat, Elephant, Horse, Rabbit, Pig, Opossum, Platypus (85%).