Hien D L, Nhan N T, Ngo V Thanh, Viet N A
Institute of Physics and Electronics, P. O. Box 429, Boho, Hanoi 10000, Vietnam.
Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Aug;76(2 Pt 1):021921. doi: 10.1103/PhysRevE.76.021921. Epub 2007 Aug 21.
We propose a simple model for DNA denaturation bases on the pendulum model of Englander [Proc. Natl. Acad. Sci. U.S.A. 77, 7222 (1980)] and the microscopic model of Peyrard and Bishop [Phys. Rev. Lett. 62, 2755 (1989)], so-called "combined model." The main parameters of our model are the coupling constant k along each strand, the mean stretching y* of the hydrogen bonds, the ratio of the damping constant and driven force gamma/F. We show that both the length L of unpaired bases and the velocity v of kinks depend on not only the coupling constant k but also the temperature T. Our results are in good agreement with previous works.
我们基于英格兰德（Englander）的摆锤模型[《美国国家科学院院刊》77, 7222 (1980)]和佩拉尔（Peyrard）与毕晓普（Bishop）的微观模型[《物理评论快报》62, 2755 (1989)]提出了一个简单的DNA变性模型，即所谓的“组合模型”。我们模型的主要参数是每条链上的耦合常数k、氢键的平均伸长y*、阻尼常数与驱动力的比值γ/F。我们表明，未配对碱基的长度L和纽结的速度v不仅取决于耦合常数k，还取决于温度T。我们的结果与先前的工作非常吻合。
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