Immunogen sequence: QEWLLKQKSQ APEKPLVISQ MGSKKKPKII QQNKKETSPQ VKGEEMPAGK DQEASRGSVP SGSKMDRRAP VPRTKASGTE HNKKGTKERT NGDIVPERGD IEHKKRKAKE AAPAPPTEED IWFDDVDP Highest antigen sequence identity to the following orthologs: Mouse - 53%, Rat - 52%. REXO4 (