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Hexagonal → cholesteric phase transition of DNA molecules in liquid-crystalline dispersion particles

  • Physical Chemistry
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Abstract

To assess the character of packing of double-stranded (ds) DNA molecules in liquid-crystalline dispersion particles formed by phase exclusion of DNA molecules from aqueous salt solutions of poly(ethylene glycol), the circular dichroism spectra of these dispersions at different temperatures have been compared. It has been shown for the first time that heating dispersion particles with the hexagonal packing of ds-DNA molecules is accompanied by the hexagonal → cholesteric phase transition. This result can be described using the notion of quasi-nematic layers composed of orientationally ordered adjacent ds-DNA molecules in the structure of dispersion particles; these layers can be packed in two ways dictating their hexagonal or cholesteric spatial structure.

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Authors and Affiliations

  1. Engelgardt Institute of Molecular Biology, Russian Academy of Sciences, ul. Vavilova 32, Moscow, 119991, Russia

    Yu. M. Yevdokimov, S. G. Skuridin & V. I. Salyanov

  2. Landau Institute of Theoretical Physics, Russian Academy of Sciences, ul. Kosygina 2, Moscow, 119334, Russia

    E. I. Katz

Authors
  1. Yu. M. Yevdokimov
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  2. S. G. Skuridin
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  3. V. I. Salyanov
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  4. E. I. Katz
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Correspondence to Yu. M. Yevdokimov.

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Original Russian Text © Yu.M. Yevdokimov, S.G. Skuridin, V.I. Salyanov, E.I. Katz, 2016, published in Doklady Akademii Nauk, 2016, Vol. 467, No. 5, pp. 556–559.

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Yevdokimov, Y.M., Skuridin, S.G., Salyanov, V.I. et al. Hexagonal → cholesteric phase transition of DNA molecules in liquid-crystalline dispersion particles. Dokl Phys Chem 467, 53–55 (2016). https://doi.org/10.1134/S0012501616040035

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  • DOI: https://doi.org/10.1134/S0012501616040035

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