Immunogen sequence: AHTGAARSCR FRGRHYKREF RLEGEPVALR CPQVPYWLWA SVSPRINLTW HKNDSARTVP GEEETRMWAQ DGALWLLPAL QEDSGTYVCT TRNASYCDKM SIELRVFENT DAFLPFISYP QILTLSTSGV LVCPDLSEFT RDKTDVKIQW YKDSLLLDKD NEKFLSVRGT THLLVHDVAL EDAGYYRCVL TFAHEGQQYN ITRSIELRIK KKK