Immunogen sequence: VIKDKYGKDA TNVGDEGGFA PNILENSEAL ELVKEAIDKA GYTEKIVIGM DVAASEFYRD GKYDLDFKSP TDPSRYITGD QLGALYQDFV RDYPVVSIED PFDQDDWAAW SKFTANVGIQ IVGDDLTVTN PKRIERAVEE KACNCLLLKV NQIGSVTEAI QACKLAQENG WGVMVSHRSG ETEDTFIADL VVGLCTGQIK TGAPCRSERL AKY