Immunogen sequence: VGREMTKEEK LQLRKEKKQQ KKKRKEEKGA EPETGSAVSA AQCQVGPTRE LPESGIQLGT PREKVPAGRS KAELRAER Antigen sequence identity: Mouse 78%; Rat 77%. Eukaryotic initiation factor 2B (EIF2B), which is necessary for protein synthesis, is a GTP exchange