Immunogen sequence: MNELNSVSDL DRCHLYLMVL TELINLHLKV GWKRGNPIWR VISLLKNASI QHLQEMDSGQ EPTVGSQIQR VVSMAALAMV CEAIDQKPEL QLDSLHAG Highest antigen sequence identity to the following orthologs: Mouse - 64%, Rat - 59%. The human trans-activation response (TAR