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- W2026061672 abstract "Here, we report results from experiments designed to explore the association of the phenazinium dye safranin T (ST, 3,7-diamino-2,8-dimethyl-5-phenylphenazinium chloride) with single and double stranded form of polyriboadenylic acid (hereafter poly-A) using several spectroscopic techniques. We demonstrate that the dye binds to single stranded polyriboadenylic acid (hereafter ss poly-A) with high affinity while it does not interact at all with the double stranded (ds) form of the polynucleotide. Fluorescence and absorption spectral studies reveal the molecular aspects of binding of ST to single stranded form of the polynucleotide. This observation is also supported by the circular dichroism study. Thermodynamic data obtained from temperature dependence of binding constant reveals that association is driven by negative enthalpy change and opposed by negative entropy change. Ferrocyanide quenching studies have shown intercalative binding of ST to ss poly-A. Experiments on viscosity measurements confirm the binding mode of the dye to be intercalative. The effect of [Na+] ion concentration on the binding process suggests the role of electrostatic forces in the complexation. Present studies reveal the utility of the dye in probing nucleic acid structure." @default.
- W2026061672 created "2016-06-24" @default.
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- W2026061672 date "2014-02-03" @default.
- W2026061672 modified "2023-10-03" @default.
- W2026061672 title "Binding of Phenazinium Dye Safranin T to Polyriboadenylic Acid: Spectroscopic and Thermodynamic Study" @default.
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- W2026061672 doi "https://doi.org/10.1371/journal.pone.0087992" @default.
- W2026061672 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3912202" @default.
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- W2026061672 hasPublicationYear "2014" @default.
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