Immunogen sequence: AVCQCRVGYF RARTDPRGAP CTTPPSAPRS VVSRLNGSSL HLEWSAPLES GGREDLTYAL RCRECRPGGS CAPCGGDLTF DPGPRDLVEP WVVVRGLRPD FTYTFEVTAL NGVSSLATGP VPFEPVNVTT DREVPPAVSD IRVTRSSPSS LSLAWAVPRA PSGAVLDYEV KYHEKGAEGP SSVRFLKTSE NRAELRGLKR GASYLVQVRA RSE