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Application of 57Co emission Mössbauer spectroscopy to studying biocomplexes in frozen solutions |
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| Authors: | A. A. Kamnev L. A. Kulikov Yu. D. Perfiliev L. P. Antonyuk E. Kuzmann A. Vértes |
| Affiliation: | 1. Laboratory of Biochemistry of Plant–Bacterial Symbioses, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov, 410049, Russia 2. Laboratory of Nuclear Chemistry Techniques, Department of Radiochemistry, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, 119992, Russia 3. Research Group for Nuclear Techniques in Structural Chemistry, Hungarian Academy of Sciences, Department of Nuclear Chemistry, E?tv?s Loránd University, Budapest 112, 1518, Hungary |
| Abstract: | Emission Mössbauer spectroscopy with the 57Co isotope was used to study very dilute rapidly frozen aqueous solutions of cobalt(II) complexes with low-molecular-weight biomolecules (aromatic amino acids – anthranilic acid and L-tryptophan) and within a sophisticated biopolymer, bacterial glutamine synthetase, a key enzyme of nitrogen metabolism. The appearance of after-effects of the 57Co→57Fe nuclear transformation as well as the coordination properties of the cation and the ligands in the complexes are discussed on the basis of their Mössbauer parameters. |
| Keywords: | cobalt(II) complexes frozen aqueous solutions anthranilic acid L-tryptophan metalloenzymes after-effects 57Co emission M?ssbauer spectroscopy |
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