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Article Dans Une Revue Journal of Chemical Physics Année : 2003

Writhing geometry of open DNA

Résumé

Motivated by recent experiments on DNA torsion-force-extension characteristics we consider the writhing geometry of open stiff molecules. We exhibit a cyclic motion which allows arbitrarily large twisting of the end of a molecule via an activated process. This process is suppressed for forces larger than femto-Newtons which allows us to show that experiments are sensitive to a generalization of the Cȃlugȃreanu-White formula for the writhe. Using numerical methods we compare this formulation of the writhe with recent analytic calculations.
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Dates et versions

hal-00372279 , version 1 (04-10-2021)

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Vincent Rossetto, A. C. Maggs. Writhing geometry of open DNA. Journal of Chemical Physics, 2003, 118, pp.9864--9874. ⟨10.1063/1.1569905⟩. ⟨hal-00372279⟩
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