Immunogen sequence: NKVTWGARSK DQEDGALFGS DTEGDPEKAE DDEEIDLESI DIDKIDEHDG DQSNEDDEDK AEAPHAPAAP SALARDQGSP LAAADVLKPQ DS Highest antigen sequence identity to the following orthologs: Mouse - 86%, Rat - 85%. The IRXA group includes Irx1, Irx2 and Irx4; t