Immunogen sequence: TVGAFIDLTQ DASSEAKSEG NHPALAVEDL GCGVIQVDED NCKEEKAQVA NRPLKCIVEE TYIDLTTESP SSCEVKKDEL KSEPGSNCDN SELPGTLHNS HKKRRNISDL NHPHKKQRKE TDLTNKEKTK KPTQDSCENT EAHQKKASKK KAPPVTKDPS SLKATPGIKD SSAALATSTS LSAKNVIKKK GEIIILWTRN DDREILLECQ KRG