Immunogen sequence: AASQAGSNYP RCWNCGGPWG PGREDRFFCP QCRALQAPDP TRDYFSLMDC NRSFRVDTAK LQHRYQQLQR LVHPDFFSQR SQTEKDFSEK HSTLVNDAYK TLLAPLSRGL YLLKLHGIEI PERTDYEMDR QFLIEIMEIN EKLAEAESEA AMKEIESIVK AKQKEFTDNV SSAFEQDDFE EAKEILTKMR YFSNIEEKIK LKKIPL. May ac