Immunogen sequence: TLEYVSSLDF WYCKRCKANI GGHRSSCSFC KNPREVTEAK QELITYPQPQ KTSIPAPLEK QPNQPLRPAD KEPEPRKREE GQESRLGHQK REAERYLPPS RREGPTFRRD RERESWSGET RQDGESKTIM LKRIYRSTPP EVIVEVLEPY VRLTTANVRI IKNRTGPMGH TYGFIDLDSH AEALRVVKIL QNLDPPFSID GKMVAVNLAT GKR