Immunogen: A peptide sequence corresponding to amino acids 127-144 (DSPLYIFDSSYGEHPKRR) of human PTDSR was used as the immunogen. Percent identity by BLAST analysis: Human, Gorilla, Orangutan, Monkey, Marmoset, Mouse, Rat, Dog, Bat, Bovine, Hamster, Elephant, Panda, Horse, Rabbit, Opossum, Turkey, Chicken, Platypus, Lizard (100%); Xenopus, Pufferfish, Stickleback (94%); Zebrafish, Seq squirt (89%); Drosophila, Water flea, Mosquito, Ant, Tick, Tunicate (83%).