Immunogen sequence: HILILATTRS GSSFVGQLFN QHLDVFYLFE PLYHVQNTLI PRFTQGKSPA DRRVMLGASR DLLRSLYDCD LYFLENYIKP PPVNHTTDRI FRRGASRVLC SRPVCDPPGP ADLVLEEGDC VRKCGLLNLT VAAEACRERS HVAIKTVRVP EVNDLRALVE DPRLNLKVIQ LVRDPRGILA SRSETFRDTY RLWRLWYGTG RKPYNLDVTQ LTT