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The 20-PDB (light color) or 50-PDB (dark color) ensemble fits of (A) U2AF651,2 (blue) and (B) U2AF651,2FIR (green) SAXS data.The radii of gyration (RG) are plotted on the x-axis, and the frequency of a structure with a given RG on the y-axis. Gray dashed lines plot the randomized starting pool; Solid lines the selected pool. The most typical or divergent selected structures are inset.
