Unzipping of DNA with correlated base sequence

A. E. Allahverdyan, Zh S. Gevorkian, Chin Kun Hu, Ming Chya Wu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We consider force-induced unzipping transition for a heterogeneous DNA model with a correlated base sequence. Both finite-range and long-range correlated situations are considered. It is shown that finite-range correlations increase stability of DNA with respect to the external unzipping force. Due to long-range correlations the number of unzipped base pairs displays two widely different scenarios depending on the details of the base sequence: either there is no unzipping phase transition at all, or the transition is realized via a sequence of jumps with magnitude comparable to the size of the system. Both scenarios are different from the behavior of the average number of unzipped base pairs (non-self-averaging). The results can be relevant for explaining the biological purpose of correlated structures in DNA.

Original languageEnglish
Pages (from-to)16
Number of pages1
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume69
Issue number6
DOIs
StatePublished - 2004

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