Immunogen sequence: IGKCCLNKLS SDDAVRRVLA GEKGEVKGRA SLTSRSQELD NKNVREEESR VHKNTEDRGD AEIKERSTSR DRKQKEELKE DR Highest antigen sequence identity to the following orthologs: Mouse - 65%, Rat - 65%. Tumor necrosis factor receptor (TNFR) superfamily members