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Novel Cholesteric Phase in Dispersions of Nucleic Acids due to Polymeric Chelate Bridges
Authors:V.L. Golo  E.I. Kats  Yu.S. Volkov  V.I. Salyanov  Yu.M. Yevdokimov
Affiliation:(1) Department of Mechanics and Mathematics, Moscow University, Moscow, 119899, Russia;(2) Institute Laue – Langevin, BP – 156, Grenoble, Cedex – 9, France;(3) Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
Abstract:Physics, Moscow, RussiaWe consider cholesteric liquid-crystalline DNA dispersions, and show thatpolymeric (Dau-Cu) complexes, the so-called bridges, between pairs of DNA molecules may generate a super liquid-crystalline structure (BR-phase), charachterized by a soliton lattice of the spatial distribution of theorder parameter. The BR-phase could have a layered spatial structure andan abnormal optical activity that could have a bearing upon the intenseCD-band observed in DNA-dispersions.
Keywords:dichroism  DNA  liquid crystal
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