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Updated: Apr 25, 2026

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
Published on: September 21, 2017
Reentrant melting of RNA with quenched sequence randomness
G N Hayrapetyan1, F Iannelli2, J Lekscha2
1Department of Molecular Physics, Yerevan State University, 1 Alex Manougian Street, Yerevan 0025, Armenia.
Abstract:
The effect of quenched sequence disorder on the thermodynamics of RNA secondary structure formation is investigated for two- and four-letter alphabet models using the constrained annealing approach, from which the temperature behavior of the free energy, specific heat, and helicity is analytically obtained. For competing base pairing energies, the calculations reveal reentrant melting at low temperatures, in excellent agreement with numerical results. Our results suggest an additional mechanism for the experimental phenomenon of RNA cold denaturation.
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