Results 211 to 220 of about 17,484 (250)
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Organization of Oligomycin-Sensitive Adenosine Triphosphatase
Biochemical Society Transactions, 1976superaggregates to an active tetramer of 360000daltons and a slow phase of half-time 15s representing the subsequent dissociation of tetramer to an inactive dimer. When enzyme at the same concentration is mixed with 5m-ATP, only the rapid phase of tetramer production is observed.
S. Mascarello +3 more
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The Mitochondrial Adenosine Triphosphatase
1982In the previous chapter we saw that the ATPase activity of coupled mitochondria is dramatically stimulated by uncouplers and more generally by conditions that interrupt the flow of energy from the electron transfer chain to the coupling device. These observations have for a long time been interpreted to indicate that the ATPase is involved in the ...
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Barbiturates and calcium-activated adenosine triphosphatase
Neuroscience Letters, 1979Anaesthetic barbiturates potentiate and convulsant barbiturates inhibit the calcium-activated adenosine triphosphatase (Ca-ATPase) activity in rat brain synaptosomes. Such differential effects and consequent modification of transmitter release may be important in the contrasting actions of these classes of barbiturates in vivo.
Graham A.R. Johnston, Max Willow
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Energetics and mechanism of actomyosin adenosine triphosphatase
Biochemistry, 1976Rate constants were determined for the reaction of actin with subfragment 1 (S1), S1-product complex, heavy meromyosin (HMM), and HMM-products complex for a range of temperatures, pH's, and ionic strengths. For actin concentrations up to 10 muM, the rate of reassociation of the product intermediate was equal to the rate of actomyosin subfragment 1 ...
E W Taylor, H D White
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[63] Adenosine triphosphatase: Bacterial
1971Publisher Summary The membrane fragments prepared from a variety of photosynthetic bacteria, when illuminated, can synthesize adenosine triphosphate (ATP) from adenosine diphosphate (ADP) and inorganic phosphate (P i ). Chromatophores prepared from the facultative photoheterotroph, Rhodospirillum rubrum , catalyze the hydrolysis of ATP into ADP ...
Y. Horiuti, K. Nishikawa, Takekazu Horio
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Intermediate states of actomyosin adenosine triphosphatase
Biochemistry, 1976The early kinetic steps of actomyosin subfragment 1 (acto-S1) adenosine triphosphatase have been investigated by simultaneous monitoring of fluorescence and light scattering and also by observation of the time course of the production of phosphate. The results show that fluorescence enhancement occurs after the dissociation of actomyosin and that the ...
J. A. Sleep, E. W. Taylor
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Renal proton adenosine triphosphatases.
Advances in nephrology from the Necker Hospital, 1993International ...
Doucet, A. +4 more
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Adenosine triphosphatase and morphological integrity of mitochondria
Biochimica et Biophysica Acta, 1957Abstract Gramicidin, antimycin A, dinitrophenol, and butyl-3,5-diiodo-4-hydroxybenzoate stimulate mitochondrial ATPase at 23° without causing swelling of these particles. Desoxycholate, saponin, and triiodothyroacetic acid activate ATPase at 23° but also produce swelling or rupturing of the mitochondria. Triiodothyronine, thyroxine, stearic acid, and
Diane Johnson, Gladys Feldott Maley
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Histochemical adenosine triphosphatase in the subcommissural organ
Experientia, 1963Die Aktivitat der Adenosintriphosphatase im Subkommissuralorgan wurde mit der histochemischen Methode vonPadykula undHermann3 untersucht. Die Enzymaktivitat konnte bei der Ratte nur in den Ependymzellen und in den Wanden der Kapillaren beobachtet werden. Bei der Kuh zeigten auch die hypendymalen Rosetten und Gange eine deutliche Aktivitat.
S. Talanti, A. Eisalo
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