Abstract
We studied the effect of insulin on H2O2 generation by mitochondria in rat liver and heart. Insulin markedly increased the rate of H2O2 generation, which was realized via short-term activation of mitochondrial succinate dehydrogenase. In terms of the Michaelis-Menten equation describing the dependence of H2O2 generation by mitochondria on succinate concentration (succinate dehydrogenase substrate), insulin decreased the Michaelis-Menten constant and increased the maximum rate of H2O2 generation compared to the control.
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