Immunogen sequence: MNRSQEVTRD EESTRSEEVT REEMAAAGLT VTVTHSNEKH DLHVTSQQGS SEPVVQDLAQ VVEEVIGVPQ SFQKLIFKGK SLKEMETPLS ALGIQDGCRV MLIGKKNSPQ EEVELKKLKH LEKSVEKIAD QLEELNKELT GIQQGFLPKD LQAEALCKLD RRVKATIEQF MKILEEIDTL ILPENFKDSR LKRKGLVKKV QAFLAECDTV EQN