(A) Estimation of the value SE contributes to modeling in 1ctf. This graph presents the median RMSD over the six random-distance sets in each of four cases for the 1ctf structure. Data at 6 and 10 Å, both with and without SE data, are included. Lines are linear approximations to the median RMSD values. By looking at the horizontal distance between the lines, we can estimate the value of adding SE data during modeling (1ctf). (B) Estimates of the value that SE contributes to modeling in 1crn, (C) 1myt, and (D) 1svr.