Abstract
The activity of the antioxidant enzymes superoxide dismutase and glutathione peroxidase in loach and sturgeon embryogenesis as well as in red and white skeletal muscles of loach was studied. The specific activity of cytoplasmic and mitochondrial forms of superoxide dismutase in developing sturgeon embryos was higher than in loach embryos, which may be due to oxygen conditions under which these species develop in nature. A similar dependence was also observed for the activity of glutathione peroxidase in embryos of these fish species. A comparative study of specific superoxide dismutase activity in loach and sturgeon embryos and in loach skeletal muscles showed that the activity of cytoplasmic superoxide dismutase is maximum in red and white muscles and minimum in loach embryos, whereas the activity of the mitochondrial form of this enzyme is maximum in red skeletal muscles.
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