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Observations of three 're-entrant' twisted structures in double-stranded DNA dispersion particles

التفاصيل البيبلوغرافية
العنوان: Observations of three 're-entrant' twisted structures in double-stranded DNA dispersion particles
المؤلفون: E. I. Kats, V. I. Salyanov, Sergey G. Skuridin, Yuri M. Yevdokimov
المصدر: European Biophysics Journal. 51:85-94
بيانات النشر: Springer Science and Business Media LLC, 2021.
سنة النشر: 2021
مصطلحات موضوعية: Work (thermodynamics), Materials science, Biophysics, General Medicine, chemistry.chemical_compound, Crystallography, chemistry, Nucleic acid, Osmotic pressure, Molecule, Re entrant, Dispersion (chemistry), Ethylene glycol, DNA
الوصف: In this work we report on observations of new twisted (cholesteric-like) structures in liquid-crystalline dispersion particles with a hexagonal packing of double-stranded (ds) DNA molecules. Heating up to 80 °C of the DNA dispersion formed in a aqueous-salt solution with a high osmotic pressure (concentration) of poly(ethylene glycol) induces the formation of a new, optically active, spirally twisted structure of these molecules ("re-entrant" cholesteric structure (rest-A structure)). Cooling of this dispersion up to 22 °C is accompanied by the formation of an additional "re-entrant" cholesteric structure (rest-B). Modification of particles of the ds DNA dispersion (with rest-B structure) by replacing Na+ cations by multi-charged Gd3+ cations results in the third " re-entrant" structure (rest-C) despite a high density packing of ds nucleic acid molecules.
تدمد: 1432-1017
0175-7571
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::76519ffa18b7b8914a5537bc82f1a3d1
https://doi.org/10.1007/s00249-021-01578-6
حقوق: CLOSED
رقم الأكسشن: edsair.doi...........76519ffa18b7b8914a5537bc82f1a3d1
قاعدة البيانات: OpenAIRE
الوصف
تدمد:14321017
01757571