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- W2088528604 abstract "A multifaceted study on the interaction of calf-thymus DNA with two different cationic gemini surfactants alkanediyl-α-ω-bis(dodecyldimethyl-amonium)bromide, 12-s-12,2Br− (with s = 2, G2, and 10, G10) was carried out. The measurements were done at different molar ratios X = [surfactant]/[DNA]. Results show two different conformational changes in DNA: a first compaction of the polynucleotide corresponding to a partial conformational (not total) change of DNA from an extended coil state to a globular state that happens at the lower molar ratio X. A second change corresponds to a breaking of the partial condensation, that is, the transition from the compacted state to a new more extended conformation (for the higher X values) different to the initial extension. According to circular dichroism spectra and dynamic light scattering measurements, this new state of DNA seems to be similar to a ψ-phase. Measurements confirm that interactions involved in the compaction are different to those previously obtained for the analog surfactant CTAB. X values at which the conformational changes happen depend on the length of the spacer in the surfactant along with the charge of the polar heads." @default.
- W2088528604 created "2016-06-24" @default.
- W2088528604 creator A5005236333 @default.
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- W2088528604 creator A5046779604 @default.
- W2088528604 creator A5066762127 @default.
- W2088528604 creator A5070647885 @default.
- W2088528604 date "2014-06-01" @default.
- W2088528604 modified "2023-10-01" @default.
- W2088528604 title "Conformational changes of DNA in the presence of 12-s-12 gemini surfactants (s=2 and 10). Role of the spacer's length in the interaction surfactant-polynucleotide" @default.
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- W2088528604 doi "https://doi.org/10.1016/j.colsurfb.2014.03.040" @default.
- W2088528604 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24736044" @default.
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