Immunogen sequence: LFEGVQKWEE TWRLFLEFER KASDPNRFTN RGGNLLKEEK QRAKLQKMLP KLEEELKARI ELWEQEHSKA FMVNGQKFME YVAEQWEMHR LEKERAKQER QLKNKKQTET EMLYGSAPRT PSKRRGLAPN TPGKARKLNT TTMSNATANS SIRPIFGGTV YHSPVSRLPP SGSKPVAAST CSGKKTPRTG RHGANKENLE LNGSILSGGY PGS