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In vitro radioprotection of the dodecameric metabolic enzyme glutamine synthetase by Mn-antioxidants. Glutamine synthetase (622 kDa) was irradiated in the presence of Mn2+and/or the decapeptide (DP: H-Asp-Glu-His-Gly-Thr-Ala-Val-Met-Leu-Lys-OH) in potassium phosphate buffer (PiB), pH 7.4. Note that the x-axis is a logarithmic scale. Radiation source: 60Co γ-radiation (23).
