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Measurement of the mitochondrial membrane potential (ΔΨ) in aging Sod2tm1Cje (+/−) and (+/+) mouse livers. ΔΨ was measured by the uptake of tetraphenylphosphonium cation (TPP+) in Sod2tm1Cje (+/−) (▴) and in control (●) animals. The data shown are the means and standard errors for four to six independent experiments.
