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- W2022209098 abstract "The formation and dissociation kinetics of homonucleotide oligo(dT):oligo(dA):oligo(dT) triplex have been analyzed by fluorescence measurements of fluorescein-labeled oligo(dT) providing considerably higher sensitivity to monitoring reaction kinetics than traditional hypochromicity and circular dichroism. The triplex is concluded to be formed by a bimolecular process corresponding to the addition of the oligo(dT) strand to a preserved oligo(dT):oligo(dA) duplex. The association rate was found to be faster the higher the divalent cation concentration and depends upon the nature of divalent ions in the following order of efficiency: Mn2+> Mg-> Ni2+, Ca2-> Ba22+>. The more efficient metal ions for the triplex formation were found also more efficient for the stabilization. The dissociation kinetics of the third Hoogsteen-bound strand was monitored at below melting temperature by chasing the labeled dT strand from the triplex by excess of non-labeled oligonucleotide. The dissociation rate was found to be almost independent of concentration and nature of cation. The thermodynamic stabilization of triplex by cations is thus a consequence of the increased formation rate." @default.
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- W2022209098 title "Use of Fluorescein-Labeled Oligonucleotide for Analysis of Formation and Dissociation Kinetics of T:A:T Triple-Stranded DNA: Effect of Divalent Cations" @default.
- W2022209098 doi "https://doi.org/10.1093/oxfordjournals.jbchem.a021617" @default.
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