Plot of the number of observations (number of atoms, %) in each dpx interval (a, Δ = 1.00 Å; b, Δ = 0.50 Å; c, Δ = 0.25 Å; d, Δ = 0.10 Å) for the double bromodomain module of human TAFII250 (PDB: 1EQF). In b, c, and d, the peak corresponding to solvent-accessible atoms (dpx = 0) is out of scale for clarity.