Immunogen sequence: IGGKYNRGLT VVVAFRELVE PRKQDADSLQ RAWTVGWCVE LLQAFFLVAD DIMDSSLTRR GQICWYQKPG VGLDAINDAN LLEACIYRLL KLYCREQPYY LNLIELFLQS SYQTEIGQTL DLLTAPQGNV DLVRFTEKRY KSIVKYKTAF YSFYLPIAAA MYMAGIDGEK EHANAKKILL EMGEFFQIQD DYLDLFGDPS VTGKIGTDIQ DNK