Immunogen sequence: MAATKRKRRG GFAVQAKKPK RNEIDAEPPA KRHATAEEVE EEERDRIPGP VCKGKWKNKE RILIFSSRGI NFRTRHLMQD LRMLMPHSKA DTKMDRKDKL FVINEVCEMK NCNKCIYFEA KKKQDLYMWL SNSPHGPSAK FLVQNIHTLA ELKMTGNCLK GSRPLLSFDP AFDELPHYAL LKELLIQIFS TPRYHPKSQP FVDHVFTFTI LDN