Immunogen sequence: SRCLSSSKNT LKDSLFKNGN SCASQIIGSD TSSSGSASIL TNQEQLSHSV YSLSSYTPDV AFGSKDSGTL HHPHHHHSVP HQPDNLAASN TQSEGSDSVI LLKVKDSQTP TPSSTFFQAE LWIKELTSVY DSRARERLRQ IEEQKALALQ LQNQRLQERE HSVHDSVELH LRVPLEKEIP VTVVQETQKK GHKLTDSEDE F; Positive Sa