Superoxide dismutase activity in the cochlea

  title={Superoxide dismutase activity in the cochlea},
  author={Martha G. Pierson and Brian H. Gray},
  journal={Hearing Research},
It was found that superoxide dismutase (SOD) exhibits a higher specific activity in a fraction of the cochlea that contains the organ of Corti than in most other neural tissues. SOD may comprise as much as 4.3% of the soluble protein in this fraction. Approximately 74% of this SOD is cyanide-inhibitable, indicating that it is the Cu/Zn isoenzyme usually found in the cytoplasm. SOD activity was also found in a fraction containing the stria vascularis. Two enzymes that regulate peroxide… CONTINUE READING


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