Immunogen sequence: MEFVTALVNL QEESSCPICL EYLKDPVTIN CGHNFCRSCL SVSWKDLDDT FPCPVCRFCF PYKSFRRNPQ LRNLTEIAKQ LQIRRSKRKR QKENAMCEKH NQFLTLFCVK DLEILCTQCS FSTKHQKHYI CPIKKAASYH REILEGSLEP LRNNIERVEK VIILQGSKSV ELKKKVEYKR EEINSEFEQI RLFLQNEQEM ILRQIQDEEM NIL