Immunogen sequence: DLSRDRPLVL LLHLLQLGPL FRCFEVFCIY FQSGNNEEPY VSITKKRQMP KNGLSEEIEK EVGQAEGKLI THRSAFSRA Highest antigen sequence identity to the following orthologs: Mouse - 89%, Rat - 87%. The XK protein is a membrane-bound protein associated with th