Home
For authors
Submission status

Current
Archive (English)
Archive
   Volumes 61-80
   Volumes 41-60
   Volumes 21-40
   Volumes 1-20
   Volumes 81-88
      Volume 88
      Volume 87
      Volume 86
      Volume 85
      Volume 84
      Volume 83
      Volume 82
      Volume 81
Search
VOLUME 86 | ISSUE 4 | PAGE 311
Symmetries of Electrostatic Interaction between DNA Molecules
V. Golo*, E. Kats^{+\triangle 1)}, Y. Volkov* 1)
*Department of Mechancs and Mathematics Moscow University, 119899 Moscow, Russia
+Institute Landau, 117334 Moscow, Russia
^\triangleInstitut Laue-Langevin, 38042 Grenoble, France

PACS: 87.15.-v
Abstract
We study a model for pair interaction U of DNA molecules generated by the discrete dipole moments of base-pairs and the charges of phosphate groups, and find noncommutative group of eighth order {\cal S} of symmetries that leave U invariant. We classify the minima using group {\cal S} and employ numerical methods for finding them. The minima may correspond to several cholesteric phases, as well as phases formed by cross-like conformations of molecules at an angle close to \rm{90}^{o} , «snowflake phase". The results depend on the effective charge Q of the phosphate group which can be modified by the polycations or the ions of metals. The snowflake phase could exist for Q above the threshold QC. Below QC there could be several cholesteric phases. Close to QC the snowflake phase could change into the cholesteric one at constant distance between adjacent molecules.


Download PS file (GZipped, 136.6K)  |  Download PDF file (231.7K)

Список работ, цитирующих данную статью, см. здесь.

List of articles citing this article can be found here.