Immunogen sequence: NFTIDGMGNL RITEKGLKLE GDSEFLQPLY AKEIQSRPGN ALYFKSARNV TVNILNDQTK VLTQLITGPK AVEAYGKKFE VKTVSGKLLF SADNNEVVVG AERLRVLGAE GTVFPKSIET PNVRADPFKE LRLESPTRSL VMEAPKGVEI NAEAGNMEAT CRTELRLESK DGEIKLDAAK IRLPRLPHGS YTPTGTRQKV FEICVCANGR LFL