Immunogen sequence: MEPRAADGCF LGDVGFWVER TPVHEAAQRG ESLQLQQLIE SGACVNQVTV DSITPLHAAS LQGQARCVQL LLAAGAQVDA RNIDGSTPLC DACASGSIEC VKLLLSYGAK VNPPLYTASP LHEACMSGSS ECVRLLIDVG ANLEAHDCHF GTPLHVACAR EHLDCVKVLL NAGANVNAAK LHETALHHAA KVKNVDLIEM LIEFGGNIYA RDN