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Long-Range Intra-Protein Communication Can Be Transmitted by Correlated Side-Chain Fluctuations Alone
Figure 4
Distance dependence of mutual information in barstar and calmodulin.
Average excess mutual information 
as a function of distance between 
atoms. For both (a) barstar and (b) calmodulin, we summed the values of 
for all residue pairs within several inter-residue distance ranges and then divided by the number of such pairs. Results are shown for various subsets of atomic interactions: S indicates repulsive sterics, IS indicates implicit solvent, LJ indicates the Lennard-Jones interaction, and HBSB indicates the hydrogen bonding and salt-bridge interactions. See Methods for binning details.
doi: https://doi.org/10.1371/journal.pcbi.1002168.g004