Immunogen sequence: MAQYGHPSPL GMAAREELYS KVTPRRNRQQ RPGTIKHGSA LDVLLSMGFP RARAQKALAS TGGRSVQAAC DWLFSHVGDP FLDDPLPREY VLYLRPTGPL AQKLSDFWQQ SKQICGKNKA HNIFPHITLC QFFMCEDSKV DALGEALQTT VSRWKCKFSA PLPLELYTSS NFIGLFVKED SAEVLKKFAA DFAAEAASKT EVHVEPHKKQ LHV