Immunogen sequence: LAQLITQAKH TAKSISDQCA ESPAGHSFLS WLGFSSMDTN GSYTANDLDE MGQDSVRKTD EYLEKALEYL RQIFRLSEAQ LRQFTLALGT TQDENGKKQL PDCI Highest antigen sequence identity to the following orthologs: Mouse - 81%, Rat - 84%. The protein encoded by SMPD4 is a