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Keywords: enzyme activity
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Journal Articles
J Exp Biol (2021) 224 (15): jeb232918.
Published: 10 August 2021
... in rainbow trout to lower circulating glucose concentrations. In contrast to mammals, the glucose-lowering effect does not involve activation of AMPK. Amino acids Glycolysis Gluconeogenesis AMPK signaling Gene expression Enzyme activity Natural Sciences and Engineering Research Council...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (3): jeb234708.
Published: 3 February 2021
...Antonio Brun; Melisa E. Magallanes; William H. Karasov; Enrique Caviedes-Vidal ABSTRACT Although dietary flexibility in digestive enzyme activity (i.e. reaction rate) is widespread in vertebrates, mechanisms are poorly understood. When laboratory rats are switched to a higher protein diet...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (8): 1423–1434.
Published: 15 April 2017
... whole-animal metabolism more efficient. Here, we tested the applicability of the MPT to a marine ectotherm, the mussel Mytilus edulis at the intraspecific level. We determined effects of body mass on whole-organism, tissue and cellular oxygen consumption rates, on heart rate, metabolic enzyme activities...
Journal Articles
J Exp Biol (2015) 218 (19): 3077–3082.
Published: 1 October 2015
... ). Dishonest signals of strength in male slender crayfish (Cherax dispar) during agonistic encounters . Am. Nat.   170 , 284 - 291 . 10.1086/519399 Signal reliability Claw regeneration Enzyme activity Muscle physiology Claw biomechanics Performance Males of many animal species use...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (19): 3068–3076.
Published: 1 October 2015
... habitats (∼30%). In general, tadpoles were unable to alter the thermal sensitivity of physiological processes, although DTFs induced plasticity in metabolic enzyme activity in all species, although to a greater extent in species from less thermally variable environments. DTFs increased upper thermal limits...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (14): 2540–2547.
Published: 15 July 2014
... result from an interaction between ant and fungal species. Table 1. Summary of factorial ANOVA tests of enzyme activities of gardens of Atta texana and Trachymyrmex arizonensis ants cultivating either Attamyces or Trachymyces fungus Fig. 3. Mean cellulase activity in gardens...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (7): 1183–1190.
Published: 1 April 2013
... climate change. * These authors contributed equally to this work † Author for correspondence ( anttila@zoology.ubc.ca ) 25 9 2012 2 12 2012 © 2013. Published by The Company of Biologists Ltd 2013 critical maximum temperature enzyme activity heat shock protein...
Journal Articles
J Exp Biol (2012) 215 (22): 3997–4005.
Published: 15 November 2012
... and high glycolytic capacities. The high oxidative capacities also suggest that these animals may be able to withstand fatigue for long periods of time. * Author for correspondence ( ta.kohn@uct.ac.za ) 11 4 2012 9 8 2012 © 2012. 2012 fibre type enzyme activity oxidative type...
Journal Articles
J Exp Biol (2012) 215 (11): 1905–1914.
Published: 1 June 2012
..., as with LDH, would have tended to skew the Antarctic values upward. With ADH, the most likely influence on overall enzyme activities was the California oxygen minimum, which at its core (700 m; Fig. 1 ) exhibits a value of 0.2 ml l –1 . Vertical migrations of California lanternfishes would bring them...
Journal Articles
J Exp Biol (2011) 214 (23): 4041–4047.
Published: 1 December 2011
... enzyme activities. This study confirms the presence of both fast-twitch fibres and high oxidative capacity in black wildebeest, indicating an animal that can run very fast but is also fatigue resistant. Unless otherwise stated, all chemicals were from Sigma (St Louis, MO, USA). * Author...
Journal Articles
J Exp Biol (2010) 213 (22): 3894–3905.
Published: 15 November 2010
.... * Author for correspondence ( mcnamara@ffclrp.usp.br ) 19 8 2010 © 2010. 2010 Na + /K + -ATPase V-ATPase mRNA expression enzyme activity ion transporters osmoregulation salinity acclimation gill epithelial ultrastructure Macrobrachium palaemonid shrimp Salt content...
Journal Articles
J Exp Biol (2010) 213 (2): 256–261.
Published: 15 January 2010
... of postnatal expression of intestinal alkaline-phosphatase messenger-RNA species and their encoded isoenzymes . Biochem. J. 301 , 893 - 899 . ecological stoichiometry enzyme activity nutrition freshwater zooplankton cladoceran The phosphorus (P) content of algal food can strongly affect...
Journal Articles
J Exp Biol (2009) 212 (21): 3564–3575.
Published: 1 November 2009
... respond similarly during ontogenetic growth of striped bass. Mass-specific metabolic enzyme activity confirmed that glycolytic capacity scaled positively in deep white muscle (regression slope, b =0.1 to 0.8) over a body mass range of ∼20–1500 g, but only creatine phosphokinase showed positive scaling...
Journal Articles
J Exp Biol (2007) 210 (16): 2905–2911.
Published: 15 August 2007
... comparisons between ammonia concentrations in control fish were omitted from the figure and are presented in the Results. Values are means ± s.e.m. (N=8-12). ammonia toxicity liver enzyme activity gene expression mRNA nitrogen metabolism glutamine sublethal ammonia exposure...
Journal Articles
J Exp Biol (2005) 208 (18): 3593–3602.
Published: 15 September 2005
... evolution between HK activity and mass-specific metabolic rate. Although other enzymes scale allometrically with respect to body mass, e.g. trehalase, glycogen phosphorylase and citrate synthase, no other enzyme activities were correlated with metabolic rate after controlling for phylogenetic relatedness...
Journal Articles
J Exp Biol (2004) 207 (7): 1183–1192.
Published: 1 March 2004
... Analysis . Englewood Cliffs, NJ: Prentice-Hall Inc. * Author for correspondence (e-mail: navas@usp.br ) 9 1 2004 © The Company of Biologists Limited 2004 2004 locomotion Tropidurus muscle physiology metabolism enzyme activity habitat divergence evolution...
Journal Articles
J Exp Biol (2003) 206 (24): 4521–4531.
Published: 15 December 2003
...Amanda L. Southwood; Charles A. Darveau; David R. Jones SUMMARY We measured activity levels, oxygen consumption, metabolic enzyme activity,breathing frequency, heart rate and blood chemistry variables of juvenile green turtles exposed to a laboratory simulation of subtropical winter and summer...
Journal Articles
J Exp Biol (2003) 206 (19): 3455–3465.
Published: 1 October 2003
... to the new temperature was required to attain a degree of thermal compensation. * Author for correspondence (e-mail: helga.guderley@bio.ulaval.ca ) 2 7 2003 © The Company of Biologists Limited 2003 2003 mitochondria thermal acclimation oxidative muscle enzyme activity thermal...
Journal Articles
J Exp Biol (2003) 206 (7): 1193–1200.
Published: 1 April 2003
...) 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...
Journal Articles
J Exp Biol (2003) 206 (6): 1075–1083.
Published: 15 March 2003
... ). Muscle enzyme activity in man: role of substrate availability and training. Am. J. Physiol. 272 , R1620 -R1624. Helge, J. W., Richter, E. A. and Kiens, B. ( 1996 ). Interaction of training and diet on metabolism and endurance during exercise in man. J. Physiol. 292 , 293 -306. Helge, J. W...