Electrophoretic capture of a DNA chain into a nanopore

Payam Rowghanian, Alexander Y. Grosberg

    Research output: Contribution to journalArticle

    Abstract

    Based on our formulation of the DNA electrophoresis near a pore [Rowghanian and Grosberg, Phys. Rev. E (to be published)], we address the electrophoretic DNA capture into a nanopore as a steady-state process of particle absorption to a sink placed on top of an energy barrier. Reproducing the previously observed diffusion-limited and barrier-limited regimes as two different limits of the particle absorption process and matching the data, our model suggests a slower growth of the capture rate with the DNA length for very large DNA molecules than the previous model, motivating more experiments beyond the current range of electric field and DNA length. At moderately weak electric fields, our model predicts a different effect, stating that the DNA length dependence of the capture rate first disappears as the field is reduced and eventually reverses to a decreasing trend with N.

    Original languageEnglish (US)
    Article number042722
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Volume87
    Issue number4
    DOIs
    StatePublished - Apr 29 2013

    ASJC Scopus subject areas

    • Statistical and Nonlinear Physics
    • Statistics and Probability
    • Condensed Matter Physics

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