Immunogen sequence: MAVNVYSTSI TQETMSRHDI IAWVNDIVSL NYTKVEQLCS GAAYCQFMDM LFPGCISLKK VKFQAKLEHE YIHNFKLLQA SFKRMNVDKV IPVEKLVKGR FQDNLDFIQW FKKFYDANYD GKEYDPVEAR QGQDAIPPPD PGEQIFNLPK KSHHANSPTA GAAKSSPAAK PGSTPSRPSS AKRASSSGSA SKSDKDLETQ VIQLNEQVHS LKL