Immunogen sequence: MERQVLLSEP EEAAALYRGL SRQPALSAAC LGPEVTTQYG GQYRTVHTEW TQRDLERMEN IRFCRQYLVF HDGDSVVFAG PAGNSVETRG ELLSRESPSG TMKAVLRKAG GTGPGEEKQF LEVWEKNRKL KSFNLSALEK HGPVYEDDCF GCLSWSHSET HLLYVAEKKR PKAESFFQTK ALDVSASDDE IARLKKPDQA IKGDQFVFYE DWG