Immunogen sequence: WPLAQKIANT LACSSSSPAE MVQCLQQKEG EELVLSKKLK NTIYPLTVDG TVFPKSPKEL LKEKPFHSVP FLMGVNNHEF SWLIPRGWGL LDTMEQMSRE DMLAISTPVL TSLDVPPEMM PTVIDEYLGS NSDAQAKCQA FQEFMGDVFI NVPTVSFSRY LRDSGSPVFF YEFQHRPSSF AKIKPAWVKA DHGAEGAFVF GGPFLMDESS RLE