Immunogen sequence: HLWVKNCRDL LQSSYNKQRF DQPLEASTWL KNFKTTNERF LNQIKVQEKY VWNKRESTEK GSPLGEVVEQ GITRVRNATD AVGIVLKELK RQSSLGMFHL LVAVDGINAL WGRTTLKRED KSPIAPEELA LVHNLRKMMK NDWHGGAIVS ALSQTGSLFK PRKAYLPQEL LGKEGFDALD PFIPILVSNY NPKEFESCIQ YYLENNWLQH EKA