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The predicted ion-induced bending angles 
of a DNA helix as functions of ion concentrations: Mg2+ and small divalent ions (M2+) with radius 3.5 Å, for the uniform (A) and localized (B) bending. For the uniform bending, β shown in figures is scaled to the bending over 6 bps, and for the localized bending, β is the bending angle for the central six basepairs.
