Immunogen sequence: MSFPKAPLKR FNDPSGCAPS PGAYDVKTLE VLKGPVSFQK SQRFKQQKES KQNLNVDKDT TLPASARKVK SSESKKESQK NDKDLKILEK EIRVLLQERG AQDRRIQDLE TELEKMEARL NAALREKTSL SANNATLEKQ LIELTRTNEL LKSKFSENGN QKNLRILSLE LMKLRNKRET KMRGMMAKQE GMEMKLQVTQ RSLEESQGKI AQL