Immunogen sequence: VAGRYNKYSR NLPQTPWIID GERKLESSVE ELISDHLLAV FKAESFNFSS SGREDVDVRT LGNGRPFAIE LVNPHRVHFT SQEIKELQQK INNSSNKIQV RDLQLVTREA IGHMKEGEEE KTKTYSALIW TNKAIQKKDI EFLNDIKDLK IDQKTPLRVL HRRPLAVRAR VIHFMETQYV DEHHFRLHLK TQAGTYIKEF VHGDFGRTKP NIG