Four Distances between Pairs of Amino Acids Provide a Precise Description of their Interaction
Figure 5
4-D histograms of the Arg–Asp pair (d12 versus d21) from different data sources.
(A) The four distances for the Arg–Asp residue pair. (B) High-resolution X-ray data (<2 Å). (C) High-resolution X-ray data (<2 Å) collected at temperature between 275 to 300 Kelvin. (D) Low resolution X-ray data (2.5–3.0 Å). (E) NMR data. (F) Same data set as in (A) though all rotamers were randomly shuffled.