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Title:
Approximation of super-ions for single-file diffusion of multiple ions through narrow pores
Authors:
Kharkyanen, VN; Yesylevskyy, SO; Berezetskaya, NM
Author Full Names:
Kharkyanen, Valery N.; Yesylevskyy, Semen O.; Berezetskaya, Natalia M.
Source:
PHYSICAL REVIEW E 82 (5): Art. No. 051103 Part 1 NOV 3 2010
Language:
English
Document Type:
Article
KeyWords Plus:
MOLECULAR-DYNAMICS; POTASSIUM CHANNEL; BROWNIAN DYNAMICS; K+ CHANNEL; CONDUCTION; MODELS; SELECTIVITY; PERMEATION; CONTINUUM; WATER
Abstract:
The general theory of the single-file multiparticle diffusion in the narrow pores could be greatly simplified in the case of inverted bell-like shape of the single-particle energy profile, which is often observed in biological ion channels. There is a narrow and deep groove in the energy landscape of multiple interacting ions in such profiles, which corresponds to the pre-defined optimal conduction pathway in the configurational space. If such groove exists, the motion of multiple ions can be reduced to the motion of single quasiparticle, called the superion, which moves in one-dimensional effective potential. The concept of the superions dramatically reduces the computational complexity of the problem and provides very clear physical interpretation of conduction phenomena in the narrow pores.
Reprint Address:
Kharkyanen, VN, Natl Acad Sci Ukraine, Inst Phys, Dept Phys Biol Syst, Prospect Nauki 46, UA-03039 Kiev, Ukraine.
Research Institution addresses:
[Kharkyanen, Valery N.; Yesylevskyy, Semen O.; Berezetskaya, Natalia M.] Natl Acad Sci Ukraine, Inst Phys, Dept Phys Biol Syst, UA-03039 Kiev, Ukraine
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Cited Reference Count:
19
Times Cited:
0
Publisher:
AMER PHYSICAL SOC; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Subject Category:
Physics, Fluids & Plasmas; Physics, Mathematical
ISSN:
1539-3755
DOI:
10.1103/PhysRevE.82.051103
IDS Number:
674VF
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