Immunogen sequence: QNTVNPREWT PEIVISGHFD GVQDLVWDPE GEFIITVGTD QTTRLFAPWK RKDQSQVTWH EIARPQIHGY DLKCLAMINR FQFVSGADEK VLRVFSAPRN FVENFCAITG QSLNHVLCNQ DSDLPEGATV PALGLSNKAV FQGDIASQPS DEEELLTSTG FEYQQVAFQP SILTEPPTED HLLQNTLWPE VQKLYGHGYE IFCVTCNSSK TLL