Immunogen sequence: LSGVDFQLRR GEKELLVPRS STSPDRIFFH LNAVALGDGG HYTCRYRLHD NQNGWSGDSA PVELILSDET LPAPEFSPEP ESGRALRLRC LAPLEGARFA LVREDRGGRR VHRFQSPAGT EALFELHNIS VADSANYSCV YVDLKPPFGG SAPSERLELH VDGPPPRPQL RATWSGAVLA GRDAVLRCEG PIPDVTFELL REGETKAVKT VRT