Anomalous zipping dynamics and forced polymer translocation
نویسندگان
چکیده
منابع مشابه
Anomalous dynamics of forced translocation.
We consider the passage of long polymers of length N through a hole in a membrane. If the process is slow, it is in principle possible to focus on the dynamics of the number of monomers s on one side of the membrane, assuming that the two segments are in equilibrium. The dynamics of s(t) in such a limit would be diffusive, with a mean translocation time scaling as N2 in the absence of a force, ...
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In this paper, we investigate the microscopic dynamics of a polymer of length N translocating through a narrow pore. Characterization of its purportedly anomalous dynamics has so far remained incomplete. We show that the polymer dynamics is anomalous until the Rouse time τR ∼ N 1+2ν , with a mean square displacement through the pore consistent with t(1+ν)/(1+2ν), with ν ≈ 0.588 the Flory expone...
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We consider a polymer of length N translocating through a narrow pore in the absence of external fields. The characterization of its purportedly anomalous dynamics has so far remained incomplete. We show that the polymer dynamics is anomalous up to the Rouse time τR ∼ N1+2ν , with a mean square displacement through the pore consistent with t (1+ν)/(1+2ν), with ν ≈ 0.588 the Flory exponent. This...
متن کاملAnomalous dynamics of translocation.
We study the dynamics of the passage of a polymer through a membrane pore (translocation), focusing on the scaling properties with the number of monomers N. The natural coordinate for translocation is the number of monomers on one side of the hole at a given time. Commonly used models that assume Brownian dynamics for this variable predict a mean (unforced) passage time tau that scales as N2, e...
متن کاملTranslocation time of periodically forced polymer chains.
In this work we study the presence of both a minimum and clear oscillations in the frequency dependence of the translocation time of a polymer described as a unidimensional Rouse chain driven by a spatially localized oscillating linear potential. The observed oscillations of the mean translocation time arise from the synchronization between the very mean translocation time and the period of the...
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ژورنال
عنوان ژورنال: Journal of Statistical Mechanics: Theory and Experiment
سال: 2011
ISSN: 1742-5468
DOI: 10.1088/1742-5468/2011/02/p02020