Mitochondrial and peroxisomal β-oxidation capacities in various tissues from Atlantic salmon Salmo salar |
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Authors: | FrØyland Lie & Berge |
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Institution: | Institute of Nutrition, Directorate of Fisheries, Bergen, Norway,;Department of Clinical Biochemistry, University of Bergen, Haukeland Hospital, Bergen, Norway |
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Abstract: | In order to investigate the capacities of different tissues to oxidize fatty acids, total β-oxidation (mitochondrial and peroxisomal) of 1–14C]palmitoyl-CoA was determined in liver and red- and white muscle from adult and juvenile Atlantic salmon Salmo salar. By including potassium cyanide (KCN) in the assay medium, it was possible to differentiate between mitochondrial and peroxisomal β-oxidation capacities. Mitochondrial β-oxidation dominated in all tissues except in livers from juvenile fish where the peroxisomal β-oxidation dominated. In general, the red muscle possesses the highest fatty acid oxidation capacity, however, by taking into consideration the fact that white muscle occupies approximately 60% of the total body weight, this study demonstrates that the white muscle is an important tissue in the overall fatty acid catabolism. |
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Keywords: | Atlantic salmon fatty acid oxidation liver mitochondria peroxisomes red muscle white muscle |
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