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  • Title: Unzipping of DNA with correlated base sequence.
    Author: Allahverdyan AE, Gevorkian ZhS, Hu CK, Wu MC.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2004 Jun; 69(6 Pt 1):061908. PubMed ID: 15244618.
    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.
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