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- W2052536797 abstract "The use of time-resolved fluorescence measurements in studies of telomeric G-quadruplex folding and stability has been hampered by the complexity of fluorescence lifetime distributions in solution. The application of phasor diagrams to the analysis of time-resolved fluorescence measurements, collected from either frequency-domain or time-domain instrumentation, allows for rapid characterization of complex lifetime distributions. Phasor diagrams are model-free graphical representations of transformed time-resolved fluorescence results. Simplification of complex fluorescent decays by phasor diagrams is demonstrated here using a 2-aminopurine substituted telomeric G-quadruplex sequence. The application of phasor diagrams to complex systems is discussed with comparisons to traditional non-linear regression model fitting. Phasor diagrams allow for the folding and stability of the telomeric G-quadruplex to be monitored in the presence of either sodium or potassium. Fluorescence lifetime measurements revealed multiple transitions upon folding of the telomeric G-quadruplex through the addition of potassium. Enzymatic digestion of the telomeric G-quadruplex structure, fluorescence quenching and Förster resonance energy transfer were also monitored through phasor diagrams. This work demonstrates the sensitivity of time-resolved methods for monitoring changes to the telomeric G-quadruplex and outlines the phasor diagram approach for analysis of complex time-resolved results that can be extended to other G-quadruplex and nucleic acid systems." @default.
- W2052536797 created "2016-06-24" @default.
- W2052536797 creator A5012431846 @default.
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- W2052536797 date "2012-01-12" @default.
- W2052536797 modified "2023-10-14" @default.
- W2052536797 title "G-quadruplex structure and stability illuminated by 2-aminopurine phasor plots" @default.
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- W2052536797 doi "https://doi.org/10.1093/nar/gkr1286" @default.
- W2052536797 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3351194" @default.
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