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The content of methemoglobin and the functional status of its recovery system in erythrocytes have been studied for the sterlet Acipenser ruthenus L. exposed to a sodium nitrite concentration ranging from 7.25 to 217.5 mmol/L. The functional features of methemoglobin reductase system form the basis of the specific accumulation of methemoglobin. High concentrations of nitrite in plasma inhibit hemo-containing...
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