Immunogen sequence: GSLILVSASR DKTLRVWDLK DDGNMMKVLR GHQNWVYSCA FSPDSSMLCS VGASKAVFLW NMDKYTMIRK LEGHHHDVVA CDFSPDGALL ATASYDTRVY IWDPHNGDIL MEFGHLFPPP TPIFAGGAND RWVRSVSFSH DGLHVASLAD DKMVRFWRID EDYPVQVAPL SNGLCCAFST DGSVLAAGTH DGSVYFWATP RQVPSLQHLC RMS