Journal
JOURNAL OF SYNCHROTRON RADIATION
Volume 12, Issue -, Pages 292-298Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S0909049505003304
Keywords
protein radiolysis; gamma-irradiation; high-energy electron irradiation; EPR; sulfur free radicals; radiosterilization
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Radio-induced modifications in proteins have been studied using several techniques. Electron paramagnetic resonance (EPR) was used to characterize free radicals, and analysis methods (high-performance liquid chromatography, capillary electrophoresis) were employed to visualize final degraded forms. Whereas EPR indicates that perthiyl radicals are formed, analysis does not detect any compound in which such bonds would be broken. Since EPR signals decay with time, it is concluded that rearrangements occur at subsequent steps, in which the solvent used during the analysis might play a role.
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