期刊
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
卷 223, 期 14, 页码 3179-3200出版社
SPRINGER HEIDELBERG
DOI: 10.1140/epjst/e2014-02326-4
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资金
- National Science Foundation [DMR-1206045, CBET-1262286]
- National Institutes of Health [R01-HG006851]
- University of Minnesota
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1206045] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1262286] Funding Source: National Science Foundation
Modeling the dynamics of a confined, semiflexible polymer is a challenging problem, owing to the complicated interplay between the configurations of the chain, which are strongly affected by the length scale for the confinement relative to the persistence length of the chain, and the polymer-wall hydrodynamic interactions. At the same time, understanding these dynamics are crucial to the advancement of emerging genomic technologies that use confinement to stretch out DNA and read a genomic signature. In this mini-review, we begin by considering what is known experimentally and theoretically about the friction of a wormlike chain such as DNA confined in a slit or a channel. We then discuss how to estimate the friction coefficient of such a chain, either with dynamic simulations or via Monte Carlo sampling and the Kirkwood pre-averaging approximation. We then review our recent work on computing the diffusivity of DNA in nanoslits and nanochannels, and conclude with some promising avenues for future work and caveats about our approach.
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