Immunogen sequence: MATSSEEVLL IVKKVRQKKQ DGALYLMAER IAWAPEGKDR FTISHMYADI KCQKISPEGK AKIQLQLVLH AGDTTNFHFS NESTAVKERD AVKDLLQQLL PKFKRKANKE LEEKNRMLQE DPVLFQLYKD LVVSQVISAE EFWANRLNVN ATDSSSTSNH KQDVGISAAF LADVRPQTDG CNGLRYNLTS DIIESIFRTY PAVKMKYAEN VPH