Immunogen sequence: RFAQVFSQMI HLNETVKAPD IECVLRCSVL EIEQSMNRVK NISDADVHNA MDNYECNLYT FLYLVCISTK TQCSEEDQCK INKQIYNLIH Highest antigen sequence identity to the following orthologs: Mouse - 97%, Rat - 97%. Fas and tumor necrosis factor receptor 1 (TNFR1)