Small-angle X-ray scattering characterization of Prx and ComR.A, scattering intensity (log I(q)) plotted against scattering angle (q(Å-1)). B, Guinier fit of each experiment in panel A. C, normalized Kratky plots for ComR, ComR:Prx, and Prx demonstrating relative flexibility. D, distance distribution plot (P(r)) for the determination of Rg and Dmax for ComR and ComR:Prx. E, fit of the calculated P(r) distribution to the scattering data. Each plot is colored by protein sample, ComR (orange), ComR:Prx (light green), Prx (blue).