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Plot of the average angle θi between μi and Ei, computed from sets of 1,000 randomly generated conformations for each of the seven specified proteins. To analyze the effect of the stiffness of the polypeptide chain, the electrostatic field was computed by using Eq. 4, by excluding atoms defined by (i) the SW (circles) and (ii) the LW (squares). Each conformation was energy-minimized by using a soft-sphere potential (16) to relieve atomic overlaps.
