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Coupling strength, Cmn (in logarithmic scale), between the lowest 10 modes of the myosin II structure (PDB code: 1VOM), which are computed using first-order perturbation theory (a), and at finite perturbations of three different magnitudes: σk = 0.3 (b), σk = 0.5 (c), and σk = 1.0 (d). The gray scale is used to illustrate mode coupling strength.
