Sharif University of Technology Scientia Iranica 1026-3098 17 1 2010 06 01 Nonlocal Interactions in DNA Molecules at Nano-Scale 3339 EN M.R. Ejtehadi Department of Physics,Sharif University of Technology B. Eslami-Mossallam Department of Physics,Sharif University of Technology Journal Article 2010 11 06 In this paper, we try to explain the origin of the anomalous elastic behavior of nanometersized DNA molecules, which has been observed in all-atom molecular dynamic simulations [A.K. Mazur, Biophys. J. 2006]. It is shown that this anomalous behavior is a consequence of nonlocal interactions between DNA base pairs and the intrinsic curvature of DNA. A nonlocal harmonic elastic rod model is proposed, which can successfully describe the elastic behavior of short DNA molecules. https://scientiairanica.sharif.edu/article_3339_c12a5b7a29a2d4e92372feb064c9581c.pdf