Immunogen sequence: MEEVRCPEHG TFCFLKTGVR DGPNKGKSFY VCRADTCSFV RATDIPVSHC LLHEDFVVEL QGLLLPQDKK EYRLFFRCIR SKAEGKRWCG SIPWQDPDSK EHSVSNKSQH ASETFHHSSN WLRNPFKVLD KNQEPALWKQ LIKGEGEEKK ADKKQREKGD QLFDQKKEQK PEMMEKDLSS GLVPKKKQSV VQEKKQEEGA EIQCEAETGG THK