Immunogen sequence: LKRKFIQMRR PFLERRDLII QHIPGFWVKA FLNHPRISIL INRRDEDIFR YLTNLQVQDL RHISMGYKMK LYFQTNPYFT NMVIVKEFQR NRSGRLVSHS TPIRWHRGQE PQARRHGNQD ASHSFFSWFS NHSLPEADRI AEIIKNDLWV NPLRYYLRER GSRIKRKKQE MKKRKTRGRC EVVIMEDAPD YYAVEDIFSE ISDIDETIHD IKI