Immunogen sequence: IIVTTKSGGR GTSTVSFKLL KPEKIGILDQ SAVWVDEMNY YDMRTDRNKG IPPLSLRPAN PLGIEIEKSK FSQKDLEMLF HGMSADFTS Highest antigen sequence identity to the following orthologs: Mouse - 93%, Rat - 94%. The protein encoded by this gene is a component of