Immunogen sequence: LSRFLEDDPS DPTYTSSLGG KIPIRWTAPE AIAYRKFTSA SDVWSYGIVM WEVMSYGERP YWDMSNQDVI NAVEQDYRLP PPMDCPTALH QLMLDCWVRD RNLRPKFSQI VNTLDKLIRN AASLKVIASA QSGMSQPLLD RTVPDYTTFT TVGDWLDAIK MGRYKESFVS AGFASFDLVA QMTAEDLLRI GVTLAGHQKK ILSSIQDMRL QMN