Immunogen sequence: VGYTPDVLTD TTAELAVSLL LTTCRRLPEA IEEVKNGGWT SWKPLWLCGY GLTQSTVGII GLGRIGQAIA RRLKPFGVQR FLYTGRQPRP EEAAEFQAEF VSTPELAAQS DFIVVACSLT PATEGLCNKD FFQKMKETAV FINISRGDVV NQDDLYQALA SGKIAAAGLD VTSPEPLPTN HPLLTLKNCV ILPHIGSATH RTRNTMSLLA ANN