Abstract
We investigate a mechanical model for the DNA molecule using an extension of the Peyrard and Bishop model. In the present model, there are two chains of oscillators linked by a Morse potential, which represent the hydrogen bonds. The rotational and vibrational motions of each base pair are considered and the coupling for these motions are introduced by a nonlinear combination of them in the Morse potential. In this context, thermodynamics and structural properties are discussed.



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Acknowledgements
This work was partially supported by FAPESP, CNPq, FUNDUNESP, and CAPES (Brazilian agencies). EDF wishes to thank the Isaac Newton Institute for Mathematical Sciences, University of Cambridge, for support during the program on Combinatorics and Statistical Mechanics (January–June 2008), where this work was discussed and completed.
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Silva, R.A.S., Filho, E.D. & Ruggiero, J.R. A Model Coupling Vibrational and Rotational Motion for the DNA Molecule. J Biol Phys 34, 511–519 (2008). https://doi.org/10.1007/s10867-008-9111-2
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DOI: https://doi.org/10.1007/s10867-008-9111-2


