Immunogen sequence: GGAYVLDDSD GLGREFDGIG AVSGGGATSR LLVNYPEPYR SQILDYLFKP NFGASLHILK VEIGGDGQTT DGTEPSHMHY ALDENYFRGY EWWLMKEAKK RNPNITLIGL PWSFPGWLGK GFDWPYVNLQ LTAYYVVTWI VGAKRYHDLD IDYIGIWNER SYNANYIKIL RKMLNYQGLQ RVKIIASDNL WESISASMLL DAELFKVVDV IGA