Results 211 to 220 of about 189,720 (274)

Organization of Oligomycin-Sensitive Adenosine Triphosphatase

Biochemical Society Transactions, 1976
superaggregates 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.
M D, Partis, E, Bertoli, S, Mascarello, D E, Griffiths   +3 more
openaire   +2 more sources

Intermediate states of actomyosin adenosine triphosphatase

Biochemistry, 1976
The 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
openaire   +2 more sources

[63] Adenosine triphosphatase: Bacterial

1971
Publisher 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 ...
T. Horio, K. Nishikawa, Y. Horiuti
openaire   +1 more source

Membrane Adenosine Triphosphatases of Prokaryotic Cells

Annual Review of Biochemistry, 1979
PERSPECTIVES AND SUMMARY . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J A, Downie, F, Gibson, G B, Cox
openaire   +2 more sources

Renal proton adenosine triphosphatases.

Advances in nephrology from the Necker Hospital, 1993
International ...
Doucet, A., Khadouri, C, Cheval, L., Marsy, S, Barlet-Bas, C   +4 more
openaire   +2 more sources

Structure of the Vacuolar Adenosine Triphosphatases

Cell Biochemistry and Biophysics, 2001
Vacuolar adenosine triphosphatases (V-ATPases) represent an important class of proton pumps found in endomembrane systems of eucaryotic cells, where they are involved in pH regulation. Progress has been made in the structure determination of this large, membrane-bound multisubunit enzyme complex.
openaire   +2 more sources

Molecular kinetics of muscle adenosine triphosphatase

Archives of Biochemistry and Biophysics, 1952
Abstract 1. 1. The kinetics of the dephosphorylation of ATP by myosin follow the law, −d [ ATP ] dt = k 2 K[ myosin ][ ATP ] (1 + K [ ATP ]) . The apparent heats and entropies associated with K2 and K are, respectively, Δ H 2 ‡ = 12.4 kcal, mole −1 ; Δ S 2 ‡ = −8 cal. mole −1
L, OUELLET, K J, LAIDLER, M F, MORALES
openaire   +2 more sources

Adenosine triphosphatase activities in Trypanosoma cruzi

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1978
1. Subcellular fractions obtained from epimastigotes of Trypanosoma cruzi, disrupted by three different procedures, contained in addition to the already known Mg2+-activated adenosine triphosphatase (ATPase; E.C.3.6.1.4), a Ca2+-ATPase activity. 2. The Ca2+-ATPase (a) was activated by low concentrations of CaCl2 (apparent Ka, 80 microM); (b) had a Km ...
A C, Frasch, E L, Segura, J J, Cazzulo, A O, Stoppani   +3 more
openaire   +2 more sources

Adenosine triphosphatase of mycobacteria.

Microbios, 1980
A Mg+2-(Ca+2)-activated adenosine triphosphatase activity has been demonstrated in saprophytic, human pathogenic and non-pathogenic, and atypical, species of mycobacteria. (Na+ + K+)-activated adenosine triphosphatase was absent in the species investigated.
G, Grover, K R, Dhariwal, T A, Venkitasubramanian   +2 more
openaire   +1 more source

The Mitochondrial Adenosine Triphosphatase

1982
In 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 ...
openaire   +1 more source