Immunogen: Synthetic 17 amino acid peptide from internal region of human PDE9A. Percent identity with other species by BLAST analysis: Human, Gibbon, Monkey, Marmoset, Dog (100%); Gorilla, Mouse, Bat, Bovine, Panda, Pig, Turkey, Chicken (94%); Rat (88%); Elephant, Platypus, Lizard (82%).