Immunogen sequence: IKNVVSGKTS ACFEPSLDYM VTKIPRWDLD RFHGTSSRIG SSMKSVGEVM AIGRTFEESF QKALRMCHPS IEGFTPRLPM NKEWPSNLDL RKELSEPSST RIYAIAKAID DNMSLDEIEK LTYIDKWFLY KMRDILNMEK TLKGLNSESM TEETLKRAKE IGFSDKQISK CLGLTEAQTR ELRLKKNIHP WVKQIDTLAA EYPSVTNYLY VTY