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Kinetic barriers in RNA unzipping

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  • A. Imparato
  • L. Peliti

Abstract

We consider a simple model for the unfolding of RNA tertiary structure under dynamic loading. The opening of such a structure is regarded as a two step process, each corresponding to the overcoming of a single energy barrier. The resulting two-barrier energy landscape accounts for the dependence of the unfolding kinetics on the pulling rate. Furthermore at intermediate force, the two barriers cannot be distinguished by the analysis of the opening kinetic, which turns out to be dominated by a single macro-barrier, whose properties depend non-trivially on the two single barriers. Our results suggest that in pulling experiments on RNA molecule containing tertiary structures, the details of the single kinetic barriers can only be obtained using a low pulling rate value, or in the high force regime. Copyright Springer-Verlag Berlin/Heidelberg 2004

Suggested Citation

  • A. Imparato & L. Peliti, 2004. "Kinetic barriers in RNA unzipping," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 39(3), pages 357-363, June.
    • Handle: RePEc:spr:eurphb:v:39:y:2004:i:3:p:357-363
    DOI: 10.1140/epjb/e2004-00201-3
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