Immunogen sequence: EHLMPSSTYV ARVRTRLAPG SRLSGRPSKW SPEVCWDSQP GDEAQPQNLE CFFDGAAVLS CSWEVRKEVA SSVSFGLFYK PSPDAGEEEC SPVLREGLGS LHTRHHCQIP VPDPATHGQY IVSVQPRRAE KHIKSSVNIQ MAPPSLNVTK DGDSYSLRWE TMKMRYEHID HTFEIQYRKD TATWKDSKTE TLQNAHSMAL PALEPSTRYW ARV