Stationary and moving breathers in a simplified model of curved alpha--helix proteins

Details Stationary and moving breathers in a simplified model of curved alpha--helix proteins Stationary and moving breathers in a simplified model of curved alpha--helix proteins

2002-06-28

arxiv.org/abs/nlin/0206050v2

J. Phys. A: Math. Gen. 35:8885-8902, 2002.

Nonlinear Sciences

Pattern Formation and Solitons

19 pages, 11 figures

Scientific paper

10.1088/0305-4470/35/42/301

The existence, stability and movability of breathers in a model for alpha-helix proteins is studied. This model basically consists a chain of dipole moments parallel to it. The existence of localized linear modes brings about that the system has a characteristic frequency, which depends on the curvature of the chain. Hard breathers are stable, while soft ones experiment subharmonic instabilities that preserve, however the localization. Moving breathers can travel across the bending point for small curvature and are reflected when it is increased. No trapping of breathers takes place.

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