Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Sung, Wokyung"'
Publikováno v:
J. Chem. Phys. 133, 184902 (2010)
We study the dynamics of flexible, semiflexible, and self-avoiding polymer chains moving under a Kramers metastable potential. Due to thermal noise, the polymers, initially placed in the metastable well, can cross the potential barrier, but these eve
Externí odkaz:
http://arxiv.org/abs/1312.1215
Publikováno v:
J. Chem. Phys. 136, 205104 (2012)
We study the driven translocation of polymers under time-dependent driving forces using $N$-particle Langevin dynamics simulations. We consider the force to be either sinusoidally oscillating in time or dichotomic noise with exponential correlation t
Externí odkaz:
http://arxiv.org/abs/1212.1869
Publikováno v:
J. Chem. Phys. 137, 085101 (2012)
We study the dynamics of driven polymer translocation using both molecular dynamics (MD) simulations and a theoretical model based on the non-equilibrium tension propagation on the {\it cis} side subchain. We present theoretical and numerical evidenc
Externí odkaz:
http://arxiv.org/abs/1211.7047
We present a theoretical argument to derive a scaling law between the mean translocation time $\tau$ and the chain length $N$ for driven polymer translocation. This scaling law explicitly takes into account the pore-polymer interactions, which appear
Externí odkaz:
http://arxiv.org/abs/1211.7043
Autor:
Kim, Won Kyu, Sung, Wokyung
Publikováno v:
J. Chem. Phys. 137, 074903 (2012)
Within the cell, biopolymers are often situated in constrained, fluid environments, e.g., cytoskeletal networks, stretched DNAs in chromatin. It is of paramount importance to understand quantitatively how they, utilizing their flexibility, optimally
Externí odkaz:
http://arxiv.org/abs/1208.4905
Publikováno v:
Proc. Natl. Acad. Sci. USA, (2012) vol. 109, 14410
In addition to thermal noise, which is essential to promote conformational transitions in biopolymers, cellular environment is replete with a spectrum of athermal fluctuations that are produced from a plethora of active processes. To understand the e
Externí odkaz:
http://arxiv.org/abs/1208.4186
Autor:
Shin, Jaeoh, Sung, Wokyung
Biopolymer looping is a dynamic process that occurs ubiquitously in cells for gene regulation, protein folding, etc. In cellular environments, biopolymers are often subject to tensions which are either static, or temporally fluctuating far away from
Externí odkaz:
http://arxiv.org/abs/1112.0450
Publikováno v:
Phys. Rev. E 85, 051803 (2012)
We present a Brownian dynamics model of driven polymer translocation, in which non-equilibrium memory effects arising from tension propagation (TP) along the cis side subchain are incorporated as a time-dependent friction. To solve the effective fric
Externí odkaz:
http://arxiv.org/abs/1111.4782
We study the unexpected high flexibility of short dsDNA which recently has been reported by a number of experiments. Via the Langevin dynamics simulation of our Breathing DNA model, first we observe the formation of bubbles within the duplex and also
Externí odkaz:
http://arxiv.org/abs/1001.1956
Autor:
Asfaw, Mesfin, Sung, Wokyung
We study the stochastic resonance (SR) of a flexible polymer surmounting a bistable-potential barrier. Due to the flexibility that can enhance crossing rate and change chain conformations at the barrier, the SR behaviors manifest many features of an
Externí odkaz:
http://arxiv.org/abs/0911.2825