L-arginine metabolism in mitochondria isolated from the liver of Antarctic fish Notothenia rossii and Notothenia neglecta
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L-Arginine Metabolism in Mitochondria Isolated From the Liver of Antarctic Fish Notothenia rossii and Notothenia neglecta
The arginase tissue distribution, the biochemical properties of the argininolytic system and the subcellular localization of the enzymes carbamoylphosphate synthetase, ornithinecarbamoyl transferase, glutamine synthetase and arginase in Antarctic fish, N. neglecta and N. rossii were the main aims of the present work. The tissue with highest argininolytic activity was the kidney distal portion a...
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Mitochondrial plasticity plays a central role in setting the capacity for acclimation of aerobic metabolism in ectotherms in response to environmental changes. We still lack a clear picture if and to what extent the energy metabolism and mitochondrial enzymes of Antarctic fish can compensate for changing temperatures or PCO2 and whether capacities for compensation differ between tissues. We the...
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Hepatic mitochondrial and peroxisomal beta-oxidation were examined in an Antarctic marine teleost, Notothenia gibberifrons. Enzymic profiles and rates of beta-oxidation by intact organelles were determined by using a range of fatty acyl-CoA substrates to evaluate substrate preferences. Partitioning of beta-oxidation between organelles was estimated. Substrate selectivities are broader for perox...
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ژورنال
عنوان ژورنال: Brazilian Archives of Biology and Technology
سال: 2006
ISSN: 1516-8913
DOI: 10.1590/s1516-89132006000600017