Abstract—It is established that a medium with a reduced content of deuterium has no effect on the secondary structure of horseradish peroxidase and bovine serum albumin and caused no conformational changes in the structures of these proteins. The placement of these proteins in a buffer solution prepared based on deuterium-depleted water led to a decrease in the intensity of intrinsic tryptophan fluorescence, while the circular dichroism spectra remained virtually unchanged. A decrease in the content of deuterium in the reaction medium led to a decrease in the activity of the peroxidase oxidation reaction of o-dianisidine and luminal with hydrogen peroxide.
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This study was supported by the Russian Foundation for Basic Research (project no. 19-44-233005) and by the state task of Southern Scientific Centre of Russian Academy of Sciences (no. AAAA-A19-119040390083-6).
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Kozin, S.V., Kravtsov, A.A., Turoverov, K.K. et al. Changes in the Functional Activity of Horseradish Peroxidase and Bovine Serum Albumin in Media with Different Isotope 2H/1H Compositions. BIOPHYSICS 65, 195–201 (2020). https://doi.org/10.1134/S0006350920020098
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DOI: https://doi.org/10.1134/S0006350920020098