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The nature of different influence of Cd2+ ions on the conformational equilibrium of triple-stranded polyribonucleotides poly(U)•poly(A)•poly(U) and poly(I)•poly(A)•poly(I) in aqueous solutions

✍ Scribed by Sorokin, V. A. ;Valeev, V. A. ;Usenko, E. L. ;Andrus, E. A. ;Blagoi, Yu. P.

Book ID: 110156931
Publisher: Biophysical Society of Japan
Year: 2007
Tongue: English
Weight: 435 KB
Volume: 52
Category: Article
ISSN: 1349-2942
DOI: 10.1134/s000635090706005x

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Mg2+ ion effect on conformational equili

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## Abstract **Summary:** Differential UV spectroscopy was used to study the temperature dependence of the conformational equilibrium in aqueous poly I · poly A · poly I (A2I) solutions containing Na^+^ (0.1–2 M) and Mg^2+^ (10^−5^–0.005 M) ions. Over the whole range of the studied Na^+^ and Mg^2+^

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## Abstract Synthetic RNA poly[r(A‐T)] has been synthesized and its CD spectral properties compared to those of poly[r(A‐U)], poly[d(A‐T)], and poly[d(A‐U)] in various salt and ethanolic solutions. The CD spectra of poly[r(A‐T)] in an aqueous buffer and of poly[d(A‐T)] in 70.8% v/v ethanol are very

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## Abstract The conformational properties of poly(L‐__p__‐aminophenylalanine) have been investigated by potentiometric and circular dichroism (CD) techniques. It has been found that the polymer in the charge‐free state can assume two ordered conformations, depending upon temperature conditions. At