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Title:Mössbauer investigations of high-spin ferrous heme proteins
Author(s):Champion, Paul Morris
Doctoral Committee Chair(s):Debrunner, Peter G.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):Mössbauer investigations
heme proteins
Mössbauer spectroscopy
cytochrome P-450
ch1oroperoxidase
horseradish peroxidase
hemoglobin
Abstract:Mössbauer spectroscopy of heme proteins containing iron in the high-spin ferrous state is discussed. Paramagnetic hyperfine interactions, induced by strong applied magnetic fields, result in Mössbauer spectra that contain a wealth of information about the symmetry of the active site iron atomo Quantitative evaluation of the data relies on a spin Hamiltonian formalism that appears to work quite we110 Model calculations utilizing low-symmetry (tric1inic) crystal fields have also been developed and applied to the data. In addition, comparative studies yield information pertaining to the axial ligands of cytochrome P-450, ch1oroperoxidase, horseradish peroxidase and hemoglobin. A technique that allows the determination of zero-field splitting parameters in high-spin ferrous compounds is also described. This method does not depend on sample concentration, and "non-iron" spin impurities do not affect the resu1tso Application to ferrous f1uosilicate yields a value of D 15 K that is compatible with magnetic susceptibility investigations.
Issue Date:1975
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/30735
Other Identifier(s):2299522
Rights Information:©1975 Champion
Date Available in IDEALS:2012-04-22


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