Europhys. Lett.
Volume 69, Number 6, March 2005
Page(s) 1017 - 1023
Section Interdisciplinary physics and related areas of science and technology
Published online 18 February 2005
Europhys. Lett., 69 (6), pp. 1017-1023 (2005)
DOI: 10.1209/epl/i2004-10437-5

Correlated and decorrelated positional and orientational order in the nucleosomal core particle mesophases

V. Lorman1, R. Podgornik2, 3 and B. Zeks4

1  Laboratoire de Physique Mathématique et Théorique, Université Montpellier II F-34095 Montpellier, France
2  Department of Physics, Faculty of Mathematics and Physics, University of Ljubljana and Department of Theoretical Physics, J. Stefan Institute - SI-1000 Ljubljana, Slovenia
3  LPSB/NICHHD. Bld. 9, Rm. 1E-116, National Institutes of Health Bethesda, MD 20892-5626, USA
4  Institute of Biophysics, Medical Faculty, University of Ljubljana SI-1000 Ljubljana, Slovenia

received 16 June 2004; accepted in final form 17 January 2005
published online 18 February 2005

We investigate the orientational order of transverse-polarization vectors of long columns of nucleosomal core particles and their coupling to positional order in high-density mesophases discovered recently. Inhomogeneous polar ordering of these columns precipitates crystallization of the 2D sections with different orientations of the transverse-polarization vector on each column in the unit cell. We propose possible scenarios for going from the 2D hexagonal phase into distorted lamellar and related phases observed experimentally.

87.14.Gg - DNA, RNA.
64.70.Md - Transitions in liquid crystals.
87.15.Nn - Properties of solutions; aggregation and crystallization of macromolecules.

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