Immunogen sequence: WWMNGQSLPM THSLKLSETN RTLFLLGVTK YTAGPYECEI RNPVSASRSD PVTLNLLPKL PKPYITINNL NPRENKDVLN FTCEPKSENY TYIWWLNGQS LPVSPRVKRP IENRILILPS VTRNETGPYQ CEIRDRYGGI RSDPVTLNVL YGPDLPRIYP SFTYYRSGEV LYLSCSADSN PPAQYSWTIN EKFQLPGQKL FIRHITTKHS GLY