Immunogen sequence: HDDLYDKKVD EEAEAKMLEK YKQERLEEMF PDEVDTPRDV AARIRFQKYR GLKSFRTSPW DPKENLPQDY ARIFQFQNFT NTRKSIFKEV EEKEVEGAEV GWYVTLHVSE VPVSVVECFR QGTPLIAFSL LPHEQKMSVL NMVVRRDPGN TEPVKAKEEL IFHCGFRRFR ASPLFSQHTA ADKHKLQRFL TADMALVATV YAPITFPPAS VLL