Immunogen sequence: MWRVCARRAQ NVAPWAGLEA RWTALQEVPG TPRVTSRSGP APARRNSVTT GYGGVRALCG WTPSSGATPR NRLLLQLLGS PGRRYYSLPP HQKVPLPSLS PTMQAGTIAR WEKKEGDKIN EGDLIAEVET DKATVGFESL EECYMAKILV AEGTRDVPIG AIICITVGKP EDIEAFKNYT LDSSAAPTPQ AAPAPTPAAT ASPPTPSAQA PGS