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Title:Spin lattice relaxation studies on iron proteins
Author(s):Colvin, John Trevor
Doctoral Committee Chair(s):Stapleton, H.J.
Department / Program:Physics
Subject(s):electron spin-lattice relaxation
low spin iron proteins
protein structure
vibrational dynamics
Raman phonon scattering
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.
Issue Date:1984
Genre:Dissertation / Thesis
Rights Information:1984 John Trevor Colvin
Date Available in IDEALS:2011-06-07
Identifier in Online Catalog:826562

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