Immunogen sequence: PSPTVLNSHIS TPNVNALTHE NQTKPSISQI STTLPPTTST KKSGGASVVP HPSPTPLSQE EADNNEDPSI EEEDLLMLNS SPSTAKDTLD NGDYGEPDYD WTTGPRDDDE SDDTLEENRG YMEIEQSVK Highest antigen sequence identity to the following orthologs - mouse 53%, rat 56%. C5orf15