| Autor: |
Bar, Amir, Kabakçıoğlu, Alkan, Mukamel, David |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Physical Review E 84(4), 041935,2011 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevE.84.041935 |
| Popis: |
The denaturation transition which takes place in circular DNA is analyzed by extending the Poland-Scheraga model to include the winding degrees of freedom. We consider the case of a homopolymer whereby the winding number of the double stranded helix, released by a loop denaturation, is absorbed by \emph{supercoils}. We find that as in the case of linear DNA, the order of the transition is determined by the loop exponent $c$. However the first order transition displayed by the PS model for $c>2$ in linear DNA is replaced by a continuous transition with arbitrarily high order as $c$ approaches 2, while the second-order transition found in the linear case in the regime $1Comment: 9 pages, 4 figures |
| Databáze: |
arXiv |
| Externí odkaz: |
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