Immunogen sequence: MEEKRRRARV QGAWAAPVKS QAIAQPATTA KSHLHQKPGQ TWKNKEHHLS DREFVFKEPQ QVVRRAPEPR VIDREGVYEI SLSPTGVSRV CLYPGFVDVK EADWILEQLC QDVPWKQRTG IREDITYQQP RLTAWYGELP YTYSRITMEP NPHWHPVLRT LKNRIEENTG HTFNSLLCNL YRNEKDSVDW HSDDEPSLGR CPIIASLSFG ATR