University of Illinois Urbana-Champaign

Spin lattice relaxation studies on iron proteins

Colvin, John Trevor

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https://hdl.handle.net/2142/25315

Description

Title
Spin lattice relaxation studies on iron proteins
Author(s)
Colvin, John Trevor
Issue Date
1984
Doctoral Committee Chair(s)
Stapleton, H.J.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • electron spin-lattice relaxation
  • low spin iron proteins
  • protein structure
  • vibrational dynamics
  • Raman phonon scattering
Language
en
Abstract
The fractal model relating protein structure and vibrational dynamics is reviewed and refined. The temperature dependence of electron spin-lattice relaxation stimulated by Raman phonon scattering is measured in low spin ferric proteins. The data are analysed to yield the spectral dimension, a parameter characterizing the protein vibrational dynamics. Protein X-ray coordinate s are used to approximate a static structural parameter, the fractal dimension. These parameters are related as scaling exponents using simple physical arguments and experimental results. Central issues addressed are the domain of length scales over which the tabulated fractal dimension is a valid scaling exponent and the frequency range of protein vibrations contributing to the measurement of the spectral dimension. Recent experimental findings are interpreted to relate these regimes. They reveal a transition in the spectral dimension from reflecting the protein structure above 6K, to that of the surrounding solvent below this temperature.
Type of Resource
text
Permalink
http://hdl.handle.net/2142/25315
Copyright and License Information
1984 John Trevor Colvin

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Dissertations and Theses - Physics
Dissertations in Physics
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Graduate Theses and Dissertations at Illinois