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Mitochondrial respiratory Complex I and IV activities in ZDF rat heart: Mitochondrial respiratory enzymes complexes, Complex I (A) and Complex IV (B) were measured in freshly prepared ventricular fractions using appropriate substrates as described in the Experimental section. Results are expressed as mean ± S.E.M. from three independent experiments and asterisks indicate significant difference (*p < 0.05 and **p < 0.01).
