... evolutionary adaptation thermal acclimation proton leak lactate dehydrogenase octopine dehydrogenase respiration systemic heart branchial heart cardiac fibres The evolution of modern cephalopods was shaped by the rising competition with marine vertebrates and led to innovations that enable high...

... tolerance exists, we measured in situ cardiac function and monitored myoglobin and lactate dehydrogenase (LDH) release (both indices of myocardial damage) in hearts that were exposed to varying durations(10–30 min) of severe hypoxia ( P O =5–10 mmHg). There was a strong positive relationship between...

...Maxim Zakhartsev; Torild Johansen; Hans O. Pörtner; Ronny Blust SUMMARY The aim of this study was to determine the effects of seasonal temperature variation on the functional properties of lactate dehydrogenase (LDH) from white muscle and liver of Norwegian coastal cod ( Gadus morhua...

... within- and between-population variation, we tested whether variation in organs and organ systems (heart, gill and swimming motor mass)and the activities of several enzymes that support locomotion (citrate synthetase, lactate dehydrogenase and myofibrillar ATPase) are correlated with aerobic performance...

... other actively swimming shark species. The metabolic enzymes measured were citrate synthase(CS), an index of aerobic capacity, and lactate dehydrogenase (LDH), an index of anaerobic capacity. WM creatine phosphokinase (CPK) activity, an index of rapid ATP production during burst swimming, was also...

...) 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...

... of feeding. Analysis of enzyme activities (citrate synthase, 3-hydroxyacyl-CoA dehydrogenase and L-lactate dehydrogenase) of pharyngeal muscles in the Lake Malawi cichlid Tramitichromis intermedius revealed differences between pharyngeal jaw muscles and between males and females. Therefore, these muscles...

... type I fibres and consist only of fast-twitch type IID fibres. These fibres are optimally equipped with properties enabling a high rate of almost purely oxidative metabolism: they have a small diameter,their citrate synthase activity is higher and their lactate dehydrogenase activity is lower than...

... specific ions. In this paper, we argue that conformational differences within globular `housekeeping' enzymes may allow rapid adaptation to novel environments. Muscle-type lactate dehydrogenases (A 4 -LDHs) from the gobies Gillichthys seta and G. mirabilis have identical amino acid sequences but show...

... of the thermal stability of lactate dehydrogenase (LDH) orthologs from 22 congeneric species of porcelain crab (genera Petrolisthes and Allopetrolisthes ) from a broad range of thermal habitats. Interspecific diversity of LDH stability is high: temperatures required for a 50 % loss of activity in 10 min ranged...

...-type lactate dehydrogenase (A 4 -LDH) homologs from three scorpaenid teleost fish species and from a mammal, the cow. Test conditions lasted 1 h and were: (1) no addition, (2) 250 mmol l −1 TMAO and (3) 250 mmol l −1 glycine, in the absence and presence of trypsin. Comparisons were made at 0.1...

... in the fibre type pattern, the myosin heavy and light chain composition, or in the activity of the metabolic enzymes lactate dehydrogenase and citrate synthase of the two limb muscles, the EDL and the soleus, which in larger mammalian species exhibit distinct differences in contractile proteins and metabolic...

... fitted with satellite-linked time/depth recorders and examined developmental changes in body mass ( M b ), hemoglobin concentration, myoglobin (Mb) content and muscle citrate synthase and lactate dehydrogenase activities. Diving depth, diving duration and time-at-depth histograms were obtained from two...

...Peter A. Fields; George N. Somero ABSTRACT We compared the deduced amino acid sequences, heat stabilities and thermal sensitivities of a kinetic property, the apparent Michaelis–Menten constant ( K m ) of pyruvate, of A 4 -lactate dehydrogenase (A 4 -LDH) in four species of goby fishes (Family...

... buffering lactate dehydrogenase Chrysemys picta seasonal acclimatization Because of the importance of pH to the charge-state and consequently the function of several metabolic proteins, acid-base balance has been studied extensively in freshwater turtles ( Reeves, 1977 ). Extracellular...