Immunogen sequence: MAAALLARAS GPARRALCPR AWRQLHTIYQ SVELPETHQM LLQTCRDFAE KELFPIAAQV DKEHLFPAAQ VKKMGGLGLL AMDVPEELGG AGLDYLAYAI AMEEISRGCA STGVIMSVNN SLYLGPILKF GSKEQKQAWV TPFTSGDKIG CFALSEPGNG SDAGAASTTA RAEGDSWVLN GTKAWITNAW EASAAVVFAS TDRALQNKGI SAF