Models for energy and charge transport and storage in biomolecules

Details Models for energy and charge transport and storage in biomolecules Models for energy and charge transport and storage in biomolecules

1999-06-03

arxiv.org/abs/physics/9906007v1

Journal of Biological Physics, Vol.25, p.41-63 (1999)

Physics

Biological Physics

12 pages (latex), 12 figures (ps)

Scientific paper

Two models for energy and charge transport and storage in biomolecules are considered. A model based on the discrete nonlinear Schrodinger equation with long-range dispersive interactions (LRI's) between base pairs of DNA is offered for the description of nonlinear dynamics of the DNA molecule. We show that LRI's are responsible for the existence of an interval of bistability where two stable stationary states, a narrow, pinned state and a broad, mobile state, coexist at each value of the total energy. The possibility of controlled switching between pinned and mobile states is demonstrated. The mechanism could be important for controlling energy storage and transport in DNA molecules. Another model is offered for the description of nonlinear excitations in proteins and other anharmonic biomolecules. We show that in the highly anharmonic systems a bound state of Davydov and Boussinesq solitons can exist.

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