... respiration in the muscle, liver and kidney, and higher mass-specific and whole-organ cytochrome c oxidase activity in the liver. These data demonstrate that cellular thermogenesis partly underpins basal thermoregulation in Chinese hwameis. Cold temperature and short photoperiod can be used as helpful...

... lineage has higher anaerobic capacity substantiated by higher lactate dehydrogenase activity and higher apparent H 2 S oxidation rates, likely enabling them to tolerate H 2 S by escaping aquatic H 2 S in a terrestrial environment. However, Belize fish have increased cytochrome c oxidase and citrate...

... respiratory flux through the ETS was decreased by ∼90% in acutely hypoxic animals. Relative to carbonyl cyanide p -trifluoro-methoxyphenylhydrazone-uncoupled total ETS flux, this functional decrease was observed equally across all components of the ETS except for complex IV (cytochrome c oxidase), at which...

... birds had heightened state-4 respiration and cytochrome c oxidase activity in their liver and muscle tissue compared with warm-acclimated birds indicating the cellular mechanisms underlying their adaptive thermogenesis. Temperature appears to be a primary cue for adjusting energy budget and thermogenic...

...). Though well studied in mammals, the mechanisms by which these factors control mitochondrial content have been less studied in lower vertebrates. We evaluated the role of these transcriptional regulators in seasonal changes in white muscle cytochrome c oxidase (COX) activity in eight local fish species...

... on pro- and antioxidant metabolism may be confounded by variable activity levels among temperature groups, one species (killifish) was also subjected to a 9-day exercise acclimation. Oxidative capacity of glycolytic (skeletal) muscle (indicated by the activity of cytochrome c oxidase) was elevated by 1.5...

...-mail: [email protected] ) 14 2 2008 © The Company of Biologists Limited 2008 2008 hepatocytes primary culture adenosine temperature acclimation cytochrome c oxidase citrate synthase RNase protection assay Temperature has a large impact on many biological processes, for example...

... returning to initial levels after warm acclimation. Cytochrome c oxidase (CCO) activity in the mitochondrial preparations decreased with warm acclimation. The thermal sensitivity of the ADP affinity was markedly modified during short-term warm exposure, when the ADP/O ratio increased, but warm acclimation...

... populations of the North Sea and the Barents Sea,respectively. In white muscle, cold acclimation caused a parallel increase in citrate synthase (CS) and in cytochrome c oxidase (COX) activities,but with a much larger effect in the cold eurythermal Arctic population. In liver, cold acclimation was accompanied...

... transactivational activity. * Author for correspondence (e-mail: [email protected] ) 18 1 2005 © The Company of Biologists Limited 2005 2005 allometry scaling metabolic rate mitochondria glycolysis citrate synthase cytochrome c oxidase nuclear respiratory factor...

...) for analysis of metabolic enzyme activity (lactate dehydrogenase, citrate synthase and cytochrome c oxidase). There were significant differences in mean daily body temperatures between winter (15.66±0.43°C; mean ± S.E.M.) and summer(29.34±0.21°C), and daily body temperatures fluctuated significantly more...

...Patricia V. Burke; Robert O. Poyton ABSTRACT Eukaryotic cytochrome c oxidases are complex oligomeric membrane proteins composed of subunit polypeptides encoded by both nuclear and mitochondrial genomes. While the mitochondrially encoded subunits are encoded by unique genes, some of the nuclear...