Immunogen sequence: SSGLPRNTVV LFVPQQEAWV VERMGRFHRI LEPGLNILIP VLDRIRYVQS LKEIVINVPE QSAVTLDNVT LQIDGVLYLR IMDPYKASYG VEDPEYAVTQ LAQTTMRSEL GKLSLDKVFR ERESLNASIV DAINQAADCW GIRCLRYEIK DIHVPPRVKE SMQMQVEAER RKRATVLESE GTRESAINVA EGKKQAQILA SEAEKAEQIN QAA