Stress distributions on the cross-section of the rectangular prism (left) and of the bare helix model without backbone stiffness (right). Young-Joo Kim Do-Nyun Kim 10.1371/journal.pone.0153228.g002 https://plos.figshare.com/articles/figure/Stress_distributions_on_the_cross_section_of_the_rectangular_prism_left_and_of_the_bare_helix_model_without_backbone_stiffness_right_/3164836 <p>(a) Three-dimensional structures, (b) the axial stresses under tension, (c) the axial stresses under bending, and (d) the in-plane shear stresses under torsion. Results are calculated using E<sub>c</sub> = 668 MPa, D = 2.4 nm, and 1/AR = 0.6 with the default helical parameters for the helical continuum model. Stresses are given in MPa.</p> 2016-04-07 05:18:51 element method counterintuitive overwinding behavior duplex torsional rigidity helix Structural Basis phosphate backbones DNA Double Helix Elastic Mechanical Properties helical continuum model helical core torsional rigidities