Immunogen sequence: MHGRAYLLLH RDFCDLKENN YKGITAKPVS EDMMEWEVEI EGLQNSVWQG LVFQLTIHFT SEYNYAPPVV KFITIPFHPN VDPHTGQPCI DFLDNPEKWN TNYTLSSILL ALQVMLSNPV LENPVNLEAA RILVKDESLY RTILRLFNRP LQMKDDSQEL PKDPRKCIRP IKTTSFSDYY QTWSRIATSK ATEYYRTPLL KVPNFIGQYY KWK