Immunogen: Synthetic peptide located between aa108-157 of human EIF2AK1 (Q9BQI3, NP_055228). Percent identity by BLAST analysis: Human, Gibbon, Monkey, Galago, Marmoset, Mouse, Rat, Elephant, Panda, Dog, Bovine, Bat, Rabbit, Horse, Pig, Guinea pig (100%); Platypus (92%); Opossum (85%).