Immunogen: A 17 residue synthetic peptide DEQEALDSIMKDLVALQ(C) based on the mouse MekK3 (residues 2-18) with the cysteine (C) residue added and the peptide coupled to KLH. Percent identity by BLAST analysis: Mouse, Rat, Elephant (100%); Panda, Bovine, Dog, Bat, Horse, Rabbit, Pig, Opossum, Turkey, Chicken, Platypus, Lizard, Xenopus (94%); Human, Gorilla, Gibbon, Monkey (88%); Stickleback, Pufferfish (82%).