نتایج جستجو برای: translocating atpases
تعداد نتایج: 9536 فیلتر نتایج به سال:
V-ATPases (vacuolar H+-ATPases) are a specific class of multi-subunit pumps that play an essential role in the generation of proton gradients across eukaryotic endomembranes. Another simpler proton pump that co-localizes with the V-ATPase occurs in plants and many protists: the single-subunit H+-PPase [H+-translocating PPase (inorganic pyrophosphatase)]. Little is known about the relative contr...
The yeast vacuolar proton-translocating ATPase (VATPase) is structurally very similar to the V-ATPases of other fungi, plants and animals (for reviews, see Stevens and Forgac, 1997; Forgac, 1999; Nelson and Harvey, 1999). In all these systems, the V-ATPase is composed of a complex of peripheral membrane proteins containing the ATP binding sites attached to a complex of integral membrane protein...
The changes in ATP and PPi contents in roots under NaCl stress, and the effect of PPi on tonoplast H(+)-ATPase activity were studied with two barley cultivars differing in salt tolerance. The results showed that tonoplast H(+)-ATPase activity in salt-tolerant barley cultivar "Tanyin 2" roots increased obviously under NaCl 200 mmol/L (containing half-strength Hoagland solution) for 2 d, and decr...
Meiotic clade AAA ATPases (ATPases associated with diverse cellular activities), which were initially grouped on the basis of phylogenetic classification of their AAA ATPase cassette, include four relatively well characterized family members, Vps4, spastin, katanin and fidgetin. These enzymes all function to disassemble specific polymeric protein structures, with Vps4 disassembling the ESCRT-II...
We have evaluated the spatial distribution of energy deposition by proton beams in liquid water using the simulation code SEICS (Simulation of Energetic Ions and Clusters through Solids), which combines molecular dynamics and Monte Carlo techniques and includes the main interaction phenomena between the projectile and the target constituents: (i) the electronic stopping force due to energy loss...
This article provides a brief review of the history of the identification and characterization of the renal V-ATPase, and a review of the physiology of renal bicarbonate reabsorption and H + transport.
An ins t rument for determining the shape and in tens i ty distribut ion of particle and X-ray beams has been developed using an image intensifier tube together wi th a bundle of filaments of scintillator. A description of the use of such a device in high energy, low intensity, secondary meson and proton beams is given. I t is shown t h a t the sensi t ivi ty of th is instrumen t represents a s...
The fundamental reaction pp-->{pp}_{s}gamma, where {pp}_{s} is a proton pair with low excitation energy, has been observed with the ANKE spectrometer at COSY-Jülich for proton beam energies of T_{p}=0.353, 0.500, and 0.550 GeV. This is equivalent to photodisintegration of a free 1S0 diproton for photon energies E_{gamma} approximately T_{p}/2. The differential cross sections measured for c.m. a...
An ion-counting nanodosemeter (ND) yielding the distribution of radiation-induced ions in a low-pressure gas within a millimetric, wall-less sensitive volume (SV) was equipped with a silicon microstrip telescope that tracks the primary particles, allowing correlation of nanodosimetric data with particle position relative to the SV. The performance of this tracking ND was tested with a broad 250...
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