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American Physical Society, Physical review E: Statistical, nonlinear, and soft matter physics, 3(80)

DOI: 10.1103/physreve.80.031917

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Unraveling DNA tori under tension

Journal article published in 2009 by C. Battle, B. van den Broek, M. C. Noom, J. van Mameren ORCID, G. J. L. Wuite ORCID, F. C. MacKintosh
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This paper is available in a repository.

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Abstract

Motivated by recent experiments, we develop a model for DNA toroids under external tension. We find that tori are the equilibrium states for our model up to a critical tension, above which they become only metastable. Above this tension, we find a cascade of transitions between discrete toroid states that successively lower the winding number, until the ground state (rod) is reached. In this process, this model predicts a nearly constant force plateau as a function of extension, in agreement with experiment.