Immunogen sequence: RLWEGSTSRE RGSTGTQLCK ALVLEQLTPA LHSTNFSCVL VDPEQVVQRH VVLAQLWAGL RATLPPTQEA LPSSHSSPQQ QG Highest antigen sequence identity to the following orthologs: Mouse - 57%, Rat - 56%. Interleukin-18 binding protein (IL-18BP) is a constitutiv