Bending and Base-Stacking Interactions in Double-Stranded Semiflexible Polymer

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  • 12 October 1998
Abstract
In nature many important semiflexible polymers are double-stranded. We show that the bending energy of a double-stranded polymer can be given in very simple form, and its mechanical properties, including tangent-tangent correlation, contour length fluctuation, variable bending persistence length, force-extension relations, are studied theoretically, with their biological significance qualitatively discussed. After taking into account base-stacking interaction between adjacent base-pairs, the observed high extensibility of overstretched DNA molecules is also successfully explained.

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