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Origin of the lognormal shape in the boson-peak of globular proteins

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  • Nöllmann, M.
  • Etchegoin, P.

Abstract

We propose an explanation for the origin of the lognormal shape in the boson-peak anomaly of globular proteins. The origin is ascribed to a distribution of quasi-localization lengths for acoustic waves within the protein. The local densities of states for different sites display logarithmic singularities in this range. The distribution of these singularities, however, follows a lognormal distribution. This seems to be a universal characteristic for quasi-two dimensional random networks, which are used to model the protein dynamics. This interpretation makes explicit contact with well established models for the boson-peak anomaly in glasses and/or amorphous solids.

Suggested Citation

  • Nöllmann, M. & Etchegoin, P., 2001. "Origin of the lognormal shape in the boson-peak of globular proteins," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 294(1), pages 44-50.
    • Handle: RePEc:eee:phsmap:v:294:y:2001:i:1:p:44-50
    DOI: 10.1016/S0378-4371(01)00124-8
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