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  • Title: Altered activities of branchial and renal Na/K- and Mg-ATPases in cold-acclimated goldfish (Carassius auratus).
    Author: Paxton R, Umminger BL.
    Journal: Comp Biochem Physiol B; 1983; 74(3):503-6. PubMed ID: 6132750.
    Abstract:
    1. Cold-acclimated (1 degree C) goldfish (Carassius auratus) branchial Na/K-ATPase activity was elevated 100% while renal Na/K-ATPase activity was not significantly affected compared with warm-acclimated (20 degrees C) goldfish. 2. Cold-acclimated goldfish branchial and renal Mg-ATPase activity was reduced 18 and 30% on a per mg protein basis, respectively. 3. Renal Na/K-ATPase activity was 4.6- and 1.6-fold greater than gill in cold- and warm-acclimated fish, respectively. 4. The elevated branchial Na/K-ATPase activity and the unchanged renal Na/K-ATPase activity are consistent with the maintenance of the reduced blood ion level in cold-acclimated goldfish.
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