Immunogen sequence: MDVLVSECSA RLLQQEEEIK SLTAEIDRLK NCGCLGASPN LEQLQEENLK LKYRLNILRK SLQAERNKPT KNMINIISRL QEVFGHAIKA AYPDLENPPL LVTPSQQAKF GDYQCNSAMG ISQMLKTKEQ KVNPREIAEN ITKHLPDNEC IEKVEIAGPG FINVHLRKDF VSEQLTSLLV NGVQLPALGE NKKVIVDFSS PNIAKEMHVG HLR