Immunogen: Synthetic peptide C-QTNKAKHDELTYF from the C-terminus of human CSTB / Stefin B (NP_000091.1). Percent identity by BLAST analysis: Human, Chimpanzee, Gorilla, Orangutan, Gibbon, Elephant (100%); Monkey, Marmoset, Mouse, Dog (92%); Rat, Sheep, Hamster, Panda, Bovine, Horse, Pig, Opossum (85%).