Immunogen sequence: KNVFRKKVVS GIASKPKQDD AGRIAARNRL AAIKNAMRER IRQEECAETA VSVIPKEVDK IVFDAGFFRV ESPVKLFSGL SVSSEGPSQR LGTPKSVNKA VSQSRNEMGI PQQTTSPENA GPQNTKSEHV KKTLFLSIPE SRSSIEDAQC PGLPDLIEEN HVVNKTDLKV DCLSSERMSL PLLAGGVADD INTNKKEGIS DVVEGMELNS SIT