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Optics and Spectroscopy, 2018, Volume 125, Issue 6, Pages 845–850
DOI: https://doi.org/10.21883/OS.2018.12.46950.144-18 (Mi os834) 		 
This article is cited in 1 scientific paper (total in 1 paper)

Biophotonics

Circular dichroism spectra of DNA dispersions and textures of DNA phases

Yu. M. Evdokimova, S. G. Skuridina, V. I. Salyanova, O. N. Kompanetsb, E. I. Katsc

a Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
b Institute of Spectroscopy, Russian Academy of Sciences, 108840, Troitsk, Moscow, Russia
c Landau Institute of Theoretical Physics, Russian Academy of Sciences, 119334, Moscow, Russia
Full-text PDF (334 kB) Citations (1)
DOI: https://doi.org/10.21883/OS.2018.12.46950.144-18
Abstract: Circular dichroism (CD) spectra of liquid crystalline dispersions formed as a result of phase exclusion of double-stranded DNA molecules from aqueous-salt-poly(ethylene glycol)-containing solutions were studied at room temperature and under heating. Based on the CD spectra, it is possible to distinguish dispersions with cholesteric packing of DNA molecules from those with hexagonal DNA packing. Heating of DNA dispersions with hexagonal packing led to the appearance of an abnormal band in their CD spectra, which indicated a novel phase transition: from hexagonal to the re-entrant cholesteric packing of DNA molecules in individual particles of these dispersions. At room temperature, the spectra of such dispersions did not contain the abnormal band. By concentration of particles of liquid crystalline DNA dispersions using low-speed centrifugation, liquid crystalline DNA phases were obtained and their optical textures in thin layers were investigated. It was found that the spatial organization of DNA molecules in individual particles of dispersions formed in aqueous-salt-poly(ethylene glycol)-containing solutions may differ from their packing in macroscopic phases.
Funding agency Grant number
Russian Science Foundation 16-15-00041
This work was supported by the Russian Science Foundation (project no. 16-15-00041).
Received: 23.05.2018
Revised: 22.08.2018
English version:
Optics and Spectroscopy, 2018, Volume 125, Issue 6, Pages 1047–1052
DOI: https://doi.org/10.1134/S0030400X18120056
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: Yu. M. Evdokimov, S. G. Skuridin, V. I. Salyanov, O. N. Kompanets, E. I. Kats, “Circular dichroism spectra of DNA dispersions and textures of DNA phases”, Optics and Spectroscopy, 125:6 (2018), 845–850; Optics and Spectroscopy, 125:6 (2018), 1047–1052
Citation in format AMSBIB
\Bibitem{EvdSkuSal18}
\by Yu.~M.~Evdokimov, S.~G.~Skuridin, V.~I.~Salyanov, O.~N.~Kompanets, E.~I.~Kats
\paper Circular dichroism spectra of DNA dispersions and textures of DNA phases
\jour Optics and Spectroscopy
\yr 2018
\vol 125
\issue 6
\pages 845--850
\mathnet{http://mi.mathnet.ru/os834}
\crossref{https://doi.org/10.21883/OS.2018.12.46950.144-18}
\elib{https://elibrary.ru/item.asp?id=37044550}
\transl
\jour Optics and Spectroscopy
\yr 2018
\vol 125
\issue 6
\pages 1047--1052
\crossref{https://doi.org/10.1134/S0030400X18120056}
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