Translocation of Biopolymer Chain Through a Nanopore: Coil--Helix Transition

Chin. Phys. Lett.

2008, Vol. 25

Issue (8): 2853-5856 DOI:

Original Articles

Translocation of Biopolymer Chain Through a Nanopore: Coil--Helix Transition

GU Fang¹, WANG Hai-Jun^1,2, HONG Xiao-Zhong³, BA Xin-Wu¹

¹College of Chemistry and Environment Science, Hebei University, Baoding 071002²International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016³College of Physics Science and Technology, Hebei University, Baoding 071002

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GU Fang, WANG Hai-Jun, HONG Xiao-Zhong et al 2008 Chin. Phys. Lett. 25 2853-5856

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Abstract The translocation dynamics of a single biopolymer chain through a nanopore in a membrane is investigated by taking the coil--helix transition into account. Based on the changing of the free energy due to the coil--helix transition, the mean first passage time τ is obtained, and then the corresponding numerical simulations are presented under different conditions. It is shown that the coil--helix transition can significantly shorten the translocation time of the biopolymer chain. In addition, we also discuss the scaling behaviour for τ with the chain length N and some related problems.

Keywords: 36.20.Ey 87.15.Hp 87.15.Hj

Received: 24 January 2008 Published: 25 July 2008

PACS:	36.20.Ey	(Conformation (statistics and dynamics))
	87.15.hp	(Conformational changes)
	87.15.hj	(Transport dynamics)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2008/V25/I8/02853

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