The eutT gene of Salmonella enterica was cloned and overexpressed, and the function of its product was established in vivo and in vitro. The EutT protein has an oxygen-labile, metal-containing ATP:co(I)rrinoid adenosyltransferase activity associated with it. Functional redundancy between EutT and the housekeeping ATP:co(I)rrinoid adenosyltransferase CobA enzyme was demonstrated through phenotyp...

The yeast null mutant smf1Delta cannot grow on medium containing EGTA. Expression of Smf1p or the mammalian transporter DCT1 (Slc11a2) suppresses the above-mentioned phenotype. Both can also be expressed in Xenopus oocytes, and the uptake activity and their electrophysiological properties can be studied. We used these systems to analyze the properties of mutations in the predicted external loop...

using uv-vis spectrophotometric method, the formation constant for interaction of fe2+(aq) ion with l-alaninewas experimentally studied at ph = 4.1 ± 0.01 (50mm of potassium hydrogen phthalate buffer), ionic strengthof 0.1m potassium nitrate and at 5 different temperatures 15,20, 25,30 and 35 t. the optical absorption spectraof mixtures containing considered cation and l-alanine were analyzed b...

High-temperature (150–170 ◦C) pretreatment of lignocellulosic biomass with mineral acids is well established for xylan breakdown. Fe2+ is known to be a cocatalyst of this process although kinetics of its action remains unknown. The present work addresses the effect of ferrous ion concentration on sugar yield and degradation product formation from corn stover for the entire two-step treatment, i...

Syntheses of N,N'-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described. The complexing properties of these compounds towards metal cations (Fe2+, Cu2+, Zn2+, Co2+, Ni2+) were investigated by absorption and infrared spectroscopy. The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes wi...

The human body is full of various ions, which play an important role in the normal physiological activities. For example, Zinc ion (Zn2+) plays a vital role in protein organism and in many biochemical processes, such as inducing apotosis, enzyme regulation, and gene expression. Also, Ferrous ion (Fe2+) is vital in the oxygen transporting. But there are some ions harmful to human body. When expo...

interaction of floral pigments with metal ions can alter the final color of the petals. metal ions can affect stability of flowers final color by altering vacuolar ph and activity of enzymes involved in biosynthesis, destruction, accumulation and transition of pigments. in this study, contents of metal ions of petal tissue and their relationships with parameters of petal color analyzed and comp...

metal ions <A13+, Ca2+, Cd2+, Co2+, Cr3+, Cu2+, Fe2+, Fe3+, K+, Mg2+, Mn2+, Na+, alld Zn2+) on antioxidatiye activities of (-)-epigallocatechin gallate (EGCG) were studied by an oxygen electrode method. The antioxidatiye activities of catechins were high and censtant at pH 6-12, but decreased in acidic and strollg alkaline solutions. Copper(II) ion the most strongly increased the antioxidative ...

A method for the electro-decontamination of spent ion exchange resin contaminated with hematite under dynamic conditions using sulfuric acid solutions has been suggested. It shown that decontamination excludes secondary adsorption radionuclides on ion-exchanger sites. The efficiency this approach compared to control experiments without direct current treatment. positive effect introduction Fe2+...

5. A Fe2+ ion-ethylenediaminetetra-acetic acid complex can catalyse the oxidative formation of an inhibitor from schradan. 6. A mechanism for the simultaneous oxidation of schradan and reduced triphosphopyridine nucleotide is suggested. 7. The requirements for the conversion of dimefox to an anti-esterase are the same as those for schradan, but the rate of esterase inhibition is much higher. Di...