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Distributions of backbone ϕ, ψ dihedral angles of residues in α-helical segments of three or more residues from the 300 K simulations with the Drude and CHARMM36 force fields. Results are presented as –kTlnP where P is the probability density plotted in contour lines relative to the lowest value in the region of interest shown. The contour lines are draw from 0 to 2 kcal/mol with an interval of 0.2 kcal/mol.
