Effects of Metal Ions (Mg2+, Ca2+, Cd2+ and Zn2+) on Adenosine Triphosphate Hydrolysis
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چکیده
منابع مشابه
Mechanism of adenosine triphosphate hydrolysis by actomyosin.
The hydrolysis of ATP by acto-HMM has been studied during the transient state using a rapid-mixing apparatus. The rate of substrate binding was slightly slower and the rate of hydrolysis of the first molecule of ATP was essentially the same as for heavy meromyosin (HMM) alone. The rate of acto-HMM dissociation after binding substrate was too fast to measure in a stopped-flow apparatus, conseque...
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The observed equilibrium constant for the hydrolysis of ATP to ADP and inorganic phosphate has been calculated as a function of pH and pMg ( -log (Mg2f)) at ZS”, along with the numbers of moles of H+ and Mg2+ produced per mole of ATP hydrolyzed. This equilibrium constant has also been calculated as a function of pMg and pCa (-log (Ca”+)) at a constant pH of 7.4, along with the numbers of moles ...
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The observed standard free energy change (AGibs) for the hydrolysis of the terminal pyrophosphate bond of ATP has been experimentally determined under physiological conditions using an entirely new set of reactions. The observed equilibrium constant (K,,bs) for the combined reactions of acetate kinase (EC 2.7.2.1) and phosphate acetyltransferase (EC 2.3.1.8) has been determined at 38”, pH 7.0, ...
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During studies on photophosphorylation in cell-free preparations of the blue-green alga, Anabaena variabilis, a photohydrolysis of ATP was found to be induced by high concentrations of cysteine or GSH, while photophosphorylation became inhibited (1, 2). A similar photohydrolysis was also reported with chloroplasts from spinach leaves, but still higher sulfhydryl concentrations were required to ...
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ژورنال
عنوان ژورنال: Asian Journal of Chemistry
سال: 2014
ISSN: 0970-7077,0975-427X
DOI: 10.14233/ajchem.2014.17198