Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 119 for “"ATPase-activity"”.
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The effects of force on actin-myosin ATPase activity
… they generate movement through the actin-myosin ATPase reaction. However, the chemical reaction underlying movement remains unclear. Specifically, little is known about how the forces generated by muscle influence the chemistry of the force-generating reaction. We measured the effects of …
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Biochemical and pharmacological studies on blood platelets and erythmocytes in affective illness
… were detected in either platelet membrane ATPase or adenyl cyclase specific activity in any of the groups of patients studied, when compared to values obtained in control subjects. However, unipolar depressed and bipolar manic patients were shown to have a reduced erythrocyte membrane Na+ + …
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Mutational analysis of the tobacco etch potyvirus cylindrical inclusion protein
… 15b constructs were expressed and assayed for ATPase, ATP binding (only those proteins that were ATPase activity deficient) and RNA binding activities. The pET 11a constructs were expressed and assayed for ATP binding (only those proteins that were ATPase activity deficient) and RNA binding …
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Physical Mechanisms of Ca-ATPase Regulation in the Heart
The Ca-ATPase is an integral membrane enzyme which translocates two calcium ions from the cytoplasm of the cell to the sarcoplasmic reticulum lumen utilizing ATP breakdown as its energy source, in order to promote muscle relaxation. The focus of this research is the cardiac isoform of the Ca-ATPase …
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Proton-atpase in fish gills
… proton excretion rate and determining the proton ATPase activity in gill tissue under different inhibitor treatments and environmental conditions. Evidence for the existence of anelectrogenic proton pump in fish gills was accumulated. Branchial proton excretion rate was estimated by measuring the …
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Age-related changes in renal function, membrane metabolism, transporter activity and abundance in hypokalemic Fischer 344 x Brown-Norway F1 rats
… (BLM) protein and lipid metabolism, transporter activity and abundance were examined in non-obese male Fischer 344 x Brown-Norway Fl rats of 4 mo and 30 mo of age. These experiments were designed to examine whether age-associated changes occur in these parameters and whether the aged animals …
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Organotin and osmoregulation: quantifying the effects of environmental concentrations of sediment-associated tri-n-butyltin and triphenyltin on osmoregulatory processes in the European flounder Platichthys flesus (L)
… exposure on the passive sodium efflux and Na+/K+-ATPase activity showed an inverted relationship in the TBT group, where the Na7K+-ATPase activity was reduced and the passive sodium efflux was increased. TPhT had no inhibitory effect on Na7K+-ATPase activity and the passive sodium efflux increased …
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k-Opioid Receptor Dependent Cardioprotection in the Rat
… recovery and myofibrillar actomyosin Mg2+ATPase activity in isolated rat hearts. Pre-ischemic treatment with the k-opioid receptor agonist U50,488 (U50, 1 mM) improved post-ischemic left ventricular developed pressure (LVDP) by 35% over control hearts. Non-ischemic and post-ischemic …
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The effects of prolonged exercise on Na+, K+ - ATPase and SR Ca2+ regulation in humans
… little is known about effects on muscle Na+, K+ATPase activity and sarcoplasmic reticulum (SR) Ca2+ regulation. We therefore investigated whether these processes were impaired during cycling exercise at 74.3±1.2% v02 peak (mean±SEM) continued until fatigue, in eight healthy subjects (v02 peak …
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Effects of size, age and photoperiod on hypoosmoregulation in brook trout, Salvelinus fontinalis
… concentration, hematocrit, and gill Na+,K+-ATPase activity of brook trout in freshwater. Significant diel cycles were found in plasma osmolarity, (Na+] and thyroxine concentration. Significant size and/or age related changes occurred for plasma osmolarity, [Na+], [K+] and hematocrit, but …
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Identification of a protein kinase substrate in Sulfolobus solfataricus P2
… of the ORF sso0563, the catalytic A-type ATPase subunit A (AtpA), was phosphorylated by SsoPK4. Full length and truncated forms of AtpA were overexpressed in E. coli. Additional subunits of the ATPase were also overexpressed and ATPase activity reconstituted in vitro. Phosphoamino acid …
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Seawater survival and osmoregulation of Atlantic salmon (Salmo salar) parr-smolts exposed to four different pesticides
… After 96 h of exposure to a pesticide, Na+K+-ATPase, hematocrit, liver somatic index (LSI), plasma sodium, chloride, and cortisol concentrations were determined. There were no mortalities observed following a 24-h seawater challenge. No effects were seen with cypermethrin exposure. …
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Biochemical, structural and functional analysis of the cell division site determinant MinD(Ng): To divide or not to divide
… bacteria. MinD, a peripheral membrane ATPase, functions by recruiting the cell division inhibitor, MinC, to the membrane where it prevents septation. Counteracting this effect is MinE which can bind to MinD, thereby displacing MinC. Formation of the MinE-MinD complex also stimulates the …
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Effect of Blood Volume Manipulations and Warm Acclimation on Cortisol Levels in the Antarctic Teleost Trematomus bernacchii
… their drinking rate, and increase gill Na+, K+-ATPase activity. The renin-angiotensin system (RAS) and cortisol have been shown to increase drinking rate and gill Na+, K+-ATPase activity in fish, therefore regulating water and ion balance. Moreover, the RAS has been shown to increase cortisol …
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The Na/K-ATPase in the gills of Antarctic and New Zealand nototheniids: The Physiologic and Molecular Effects of Warm-acclimation.
… and potassium adensosine triphosphatase (Na/K-ATPase) in the chloride cells of the gill is responsible for maintenance of serum ion concentrations. The effects of thermal acclimation in two Nototheniid species, the stenothermal Antarctic Trematomous bernacchii and the eurythermal New Zealand …
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The Effect of Dietary Fats Containing Trans-Octadecenoates on Calcium Transport and Membrane Properties of The Rat Erythrocyte
… lipids is 9 to 12 days. (Ca('2+) + Mg('2+))-ATPase activity using membrane preparations from rats fed trans fatty acids had similar results to experiments using lard as the dietary fat. (Ca('2+) + Mg('2+))-ATPase activity was higher in animals fed diets containing corn oil. The increase in …
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Using Small Molecule Tools to Study ATPase Mechanoenzymes
<p>The dysregulation of AAA (ATPases associated with diverse cellular activities) mechanoenzymes has been linked to diseases, and chemical inhibitors and activators can be powerful tools to probe mechanisms and test therapeutic hypotheses. However,the structural conservation across the AAA protein …
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Sarcoplasmic reticulum responses to repeated sprints, conditioning and dietary lecithin in the horse
… using antipyralazo IIl, and Ca²⁺- ATPase activity was determined using an enzyme-linked optical assay. Resting calcium uptake rates and Ca²⁺-ATPase activities were greater when the horses were conditioned than when unconditioned (p=.05, p=.004, respectively). After exercise calcium …
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