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Keywords: amino acid
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Journal Articles
J Exp Biol (2021) 224 (6): jeb238485.
Published: 26 March 2021
... to elevated P CO 2 or the consequent reduction in seawater pH and, if the former, the possible involvement of carbonic anhydrase, the enzyme responsible for the hydration of CO 2 and production of carbonic acid. Olfactory sensitivity to amino acids was assessed by extracellular multi-unit recording from...
Journal Articles
J Exp Biol (2018) 221 (8): jeb176313.
Published: 19 April 2018
...). The results indicate that T. squamosa absorbs exogenous urea, and the rate of urea uptake in the light was significantly higher than that in darkness. The DUR3-like coding sequence obtained from its ctenidium comprised 2346 bp, encoding a protein of 782 amino acids and 87.0 kDa. DUR3-like was expressed...
Journal Articles
J Exp Biol (2018) 221 (4): jeb161489.
Published: 19 February 2018
... show differences in amino acids and biogenic amines. We took newly emerged bees and fed them with Nosema ceranae . At approximate nurse and forager ages, we employed an odor-associative conditioning assay using the proboscis extension reflex and two bioanalytical techniques to measure changes in brain...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (16): 2827–2832.
Published: 15 August 2012
...Naoko Toshima; Teiichi Tanimura SUMMARY Like mammals, insects need to ingest proteins from foods because they cannot synthesise several amino acids. Amino acids are also essential nutrients for Drosophila melanogaster , especially for female egg production, but how flies detect amino acids and how...
Includes: Supplementary data
Journal Articles
J Exp Biol (2010) 213 (20): 3449–3456.
Published: 15 October 2010
...) that comprise their olfactory organs. We also calculated the olfactory thresholds and relative effectiveness of amino acid odorants for each species. The olfactory organs varied in both the number of lamellae and lamellar surface area, which may be related to their general habitat, but neither correlated...
Journal Articles
J Exp Biol (2009) 212 (16): 2532–2540.
Published: 15 August 2009
...(10‰) on olfactory responses to changes in environmental[Ca 2+ ] and [Na + ] and amino acids by the electro-encephalogram (EEG) recorded from the olfactory bulb. The sole showed olfactory responses to increases in environmental [Na + ] and decreases in environmental [Ca 2+ ]; sensitivity to Na...
Journal Articles
J Exp Biol (2009) 212 (8): 1092–1100.
Published: 15 April 2009
... attractant by bioassay-guided fractionation and high-performance liquid chromatography, and chemically identified it as the free-amino acid l -tryptophan ( l -Trp). In the present study, levels of this ecologically meaningful compound were quantified in various abalone tissues, and in freshly spawned eggs...
Journal Articles
J Exp Biol (2008) 211 (3): 382–390.
Published: 1 February 2008
...: victoria.tebrugge@utoronto.ca ) 30 10 2007 © The Company of Biologists Limited 2008 2008 amino acid Rhodnius prolixus calcitonin diuretic hormone Rhodnius prolixus is a blood-feeding hemipteran and is one of the species responsible for the transmission of Chagas' disease. Rhodnius...
Journal Articles
J Exp Biol (2007) 210 (11): 1971–1985.
Published: 1 June 2007
... be met through the upregulation of intermediary metabolism. Arctic char intermediary metabolism was monitored during the initial 96 h of seawater acclimation through measurement of key enzymes in gill, liver, red and white muscle as well as tissue and blood free amino acid (FAA) levels, and plasma...
Journal Articles
J Exp Biol (2007) 210 (10): 1768–1775.
Published: 15 May 2007
.... The free amino acid,arginine, is abundant in fluids emitted by injured worms. Here, we demonstrate that arginine is a natural suppressant of TTX-stimulated larval escape behavior. Compared to a tapwater control, larvae initiated vigorous swimming in response to 10 –7 mol l –1 TTX. This excitatory response...
Journal Articles
J Exp Biol (2007) 210 (10): 1776–1785.
Published: 15 May 2007
... here) to those of conspecific larvae (as studied previously). Bioassays were performed in mountain streams,testing responses of free-ranging adults to 13 individual l -amino acids. Relative to stream water (controls), adults turned immediately upcurrent and moved to the source of arginine, glycine...
Journal Articles
J Exp Biol (2005) 208 (15): 2885–2894.
Published: 1 August 2005
...Konrad Dabrowski; Bendik F. Terjesen; Yongfang Zhang; James M. Phang; Kyeong-Jun Lee SUMMARY The premise that a dietary dipeptide approach will improve the understanding of amino acid utilization in the fastest-growing vertebrate, the teleost fish, was tested by examining the muscle free amino acid...
Journal Articles
J Exp Biol (2004) 207 (12): 1993–2002.
Published: 15 May 2004
... was the considerable excretion of nitrogen as amino acids(4–10%), via the gills, and as protein (3–11%), probably via the body mucus. Use of anal sutures delineated an important role for the gastrointestinal tract in the production of ammonia-N and urea-N in fed fish, but amino acid-N and protein-N output...
Journal Articles
J Exp Biol (2003) 206 (20): 3625–3633.
Published: 15 October 2003
... Limited 2003 2003 ammonia ammonia detoxification ammonia excretion amino acid carbamoyl phosphate synthetase elasmobranch Himantura signifer nitrogen metabolism ornithine-urea cycle osmoregulation stingray urea urea excretion The synthesis of excretory urea in certain land...
Journal Articles
J Exp Biol (2003) 206 (20): 3615–3624.
Published: 15 October 2003
.... Indeed, there were significant decreases in glutamate, glutamine and lysine levels in the livers of fish exposed to air, which led to a decrease in the total free amino acid content. This indirectly confirms that the specimen had reduced its rates of proteolysis and/or amino acid catabolism to suppress...
Journal Articles
J Exp Biol (2003) 206 (17): 2931–2940.
Published: 1 September 2003
... (4.7 μmol day -1 g -1 ) was comparable with that of H. signifier in 20‰ water. Therefore, H. signifer appears to have reduced its capacity to retain urea in order to survive in the freshwater environment and, consequently, it could not survive well in full-strength seawater. ammonia amino acid...
Journal Articles
J Exp Biol (2003) 206 (14): 2473–2486.
Published: 15 July 2003
... exposure. Instead, ammonia produced through amino acid catabolism was detoxified to glutamine, leading to the accumulation of glutamine in the body during the first 72 h of aerial exposure. Complimenting the increased glutamine formation was a significant increase in glutamine synthetase activity...
Journal Articles
J Exp Biol (2003) 206 (13): 2241–2255.
Published: 1 July 2003
... the standpoint of the receptor-mediated effects, but the molecular mechanisms involved in the termination of the numerous glutamatergic signals have only recently begun to receive attention. In vertebrates, glutamatergic signals are terminated by Na + /K + -dependent high-affinity excitatory amino acid...
Journal Articles
J Exp Biol (2003) 206 (4): 693–704.
Published: 15 February 2003
.... This is the highest level known in adult teleosts exposed to air or an ammonia-loading situation. The accumulated alanine could account for 70% of the deficit in ammonia excretion during this period, indicating that partial amino acid catabolism had occurred. This would allow the utilization of certain amino acids...
Journal Articles
J Exp Biol (2003) 206 (2): 245–254.
Published: 15 January 2003
...Zhilin Liu; Bruce R. Stevens; Daniel H. Feldman; Matthias A. Hediger; William R. Harvey SUMMARY KAAT1, a K + -coupled, neutral amino acid transporter from larval insect midgut, differs from other members of the Na + :neurotransmitter transporter family (SNF) in two important ways: (1) it transports...