Immunogen sequence: MEYPAPATVQ AADGGAAGPY SSSELLEGQE PDGVRFDRER ARRLWEAVSG AQPVGREEVE HMIQKNQCLF TNTQCKVCCA LLISESQKLA HYQSKKHANK VKRYLAIHGM ETLKGETKKL DSDQKSSRSK DKNQCCPICN MTFSSPVVAQ SHYLGKTHAK NLKLKQQSTK VEALHQNREM IDPDKFCSLC HATFNDPVMA QQHYVGKKHR KQE