Immunogen sequence: AKVVCFYRRR DISNTLIMLA DKHAKEIEEE SETTVEADLT DKQKHQLKHR ELFLSRQYES LPATHIRGKC SVALLNETES VLSYLDKEDT FFYSLVYDPS LKTLLADKGE IRVGPRYQAD IPEMLLEGES DEREQSKLEV KVWDPNSPLT DRQIDQFLVV ARAVGTFARA LDCSSSVRQP SLHMSAAAAS RDITLFHAMD TLYRHSYDLS SAI