Immunogen: Synthetic 19 amino acid peptide from C-terminus of human CDK12 / CRKRS. Percent identity with other species by BLAST analysis: Human, Gorilla, Gibbon, Monkey, Marmoset, Mouse, Rat, Hamster, Elephant, Panda, Dog, Bat, Rabbit (100%); Pig (95%); Bovine, Horse, Opossum (89%).