منابع مشابه
Anomalous 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 کاملAnomalous 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, ...
متن کاملWhen translocation dynamics becomes anomalous.
Recent single molecule experiments probing the passage process of a short single-stranded DNA (ssDNA) through a membrane channel (translocation) allow to measure the passage time distribution. Building on a recent modelling approach (D. K. Lubensky and D. R. Nelson, Biophys. J. 77, 1824 (1999)), which has been demonstrated to be valid for chains of up to ≃ 300 nucleotides and therefore well app...
متن کاملEffect of Anomalous Dynamics on Unbiased Polymer Translocation
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...
متن کاملAnomalous dynamics of unbiased polymer translocation through a narrow pore
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...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2001
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.65.011802