Glucose-1-phosphate uridylyltransferase, or UGPase, catalyzes the production of UDP-glucose from glucose-1-phosphate and UTP. Because of the biological role of UDP-glucose in glycogen synthesis and in the formation of glycolipids, glycoproteins, and proteoglycans, the enzyme is widespread in nature. Recently this laboratory reported the three-dimensional structure of UGPase from Escherichia col...

Nowadays, secondary batteries based on sodium (Na), potassium (K), and magnesium (Mg) stimulate curiosity as eventually high-availability, nontoxic, eco-friendly alternatives of lithium-ion (LIBs). Against this background, a spate studies has been carried out over the past few years anode materials suitable for post-lithium-ion battery (PLIBs), in particular sodium-, potassium- magnesium-ion ba...

The transport properties of various anion and cation exchange membranes were studied in different electrolyte solutions using chronopotentiometry technique to get insight about the influence of the counter ion on the transport properties of the membranes. The investigated samples include heterogeneous ion exchange membranes varying in the functionality of fixed charged gro...

Ionized calcium in serum has been determined potentiometrically by using a calcium ion-selective electrode in a flow.through configuration. For 397 normal human adults the mean value for serum ionic calcium was 1.22 ± 0.09(2 SD) mmol/Iiter. Factors affecting the measurement-such as the pro. cedure for sample collection, sample storage, the preparation of standard solutions, the type of resin em...

Lithium-ion batteries have enabled electric vehicles to achieve a foothold in the automobile market. Due an increasing environmental consciousness, are expected take larger portion of market, with ultimate goal supplanting traditional vehicles. However, involved costs, sustainability, and technical limitations lithium-ion do create substantial obstacles this goal. Therefore, article aims at pre...

The magnesium ion-dependent hydrolysis of pyrophosphate catalyzed by yeast inorganic pyrophosphatase is markedly inhibited by calcium ion. The kinetics of inhibition have been measured and analyzed in terms of a model involving strong interactions between CaPPi and two metalcomplexed forms of the enzyme, EMg and ECa. Inhibition constants for these interactions have been estimated by nonlinear r...

Treatment of purified sodium and potassium ion-activated adenosine triphosphatase from sheep kidney with N-ethylmaleimide in the presence of KC1 and ATP reduced hydrolytic activity by 83% while steady state phosphorylation was inhibited only 24%. At 3O”C, in the presence of magnesium plus inorganic phosphate, the ouabain-binding capacity of the N-ethylmaleimidetreated enzyme was only 15% less t...

INTRODUCTION An appropriate magnesium intake has proved to have beneficial effects on bone health, reduce insulin resistance and prevent atherosclerosis. OBJECTIVE To determine the concentration of magnesium in drinking water and bottled mineral water in Spain and assess its daily contribution to dietary recommendations. METHODS We used ion chromatography to analyse the magnesium concentrat...

1. A large number of invertebrates have cells that produce intracellular granules of amorphous calcium magnesium phosphates that are thought to act as ion stores or sites of metal detoxification. 2. The interatomic potentials and force constants have been calculated for these ions, and computer simulations of the crystal lattices have been used to determine the effects of ion substitutions on t...

Factors affecting CO(2) fixation in the spinach (Spinacia oleracea) chloroplast were investigated. Free magnesium ions are shown to be highly inhibitory for photosynthetic CO(2) fixation in isolated intact spinach chloroplasts. The pH optimum for CO(2) fixation is about 8.5 but is dependent upon the reaction medium. Conditions are defined under which chloroplasts illuminated in the absence of C...