The effect ofin vivo chromium exposure on Na/K- and Mg-ATPase activity in several tissues of the rainbow trout (Salmo gairdneri)

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Abstract
The effect ofin vivo chromium exposure on Na/K- and Mg-ATPase activity was studied in several tissues of the rainbow trout,Salmo gairdneri. Those tissues studied were: intestine, gill, liver, and kidney. Tissue chromium levels were determined for control rainbow trout and trout exposed to 2.5 mg Cr/1 (as chromate) for 48 hours. After exposure to chromium, inhibition of Na/K-ATPase activity, but not Mg ATPase activity, was observed. These results may partially explain the detrimental effects of hexavalent chromium on fish.