Showing papers in "Journal of Inorganic Biochemistry in 1983"

TL;DR: The crystal structure of zinc citrate [Zn(II) (C 6 H 5 O 7 ) 2 ·4NH 4 + ] shows isolated zinc ions octahedrally coordinated to two equivalent citrates via a central hydroxyl, central carboxyl, and one terminal caroxyl from each citrate as mentioned in this paper.

TL;DR: It has been concluded that Cu(HL)2+ (L-histidine = HL), the major species below pH approximately 3, contains a glycine-like bound histidine ligand with an unbound imidazolium cation, and Cu (HL)L+, which is prominent in the pH region near 4.5, exists in solution as an equilibrium mixture of a mixed-type chelation structure.

TL;DR: Results suggest that Cr(III) specifically enhances RNA synthesis in mouse liver with dose-dependent effect and statistically significant at doses of 0.05, 0.5, and 5 mg/kg.

TL;DR: The distributions confirm that, in combination with the protein- bound fraction of the tetracyclines, the metal-bound fraction represents more than 99% of these drugs in plasma, the extent of their free fraction commonly being less than 1%.

TL;DR: The results show that the glucose tolerance factor from brewer's yeast can no longer be regarded as a chromium complex.

TL;DR: Application of the separation procedure to other biological sources of GTF activity resulted in a spectrum of cationic fractions, over the pH range 1.75 to 12, which suggests that GTF cannot be a single species.

TL;DR: The Mossbauer spectra of the hexa- and nonapeptides are reported here for the first time and compared with those of the undecapeptide and the parent cytochrome.

TL;DR: In this article, the synthesis of three tetrapeptides, Gly-Pro-Gly-Tyr, and Tyr-Pro,Gly, gly and tyr, is described.

TL;DR: The 31 P nuclear magnetic resonance spectra of product and substrate binding to 1:1 molar ratios ot yeast enolase were obtained as functions of the level of various metal ions, interpreted as indicating different degrees of distortion of the R-O-P bond angle in the two metal-enzyme-substrate complexes.

TL;DR: The system represented by reaction (1) is proposed as a possible model for in vivo catalyzed release of iron from its siderophore complex at the cell wall or interior, where EDTA represents the intracellular storage depot or membrane-bound carrier and HA represents a low molecular weight hydroxamate-based metabolite capable of catalyzing interligand iron exchange.

TL;DR: The reduction potentials of the couple methemerythrin/(semi-met) r have been determined spectrally, using 2,6-dichlorophenolindophenol as a redox partner, for monomer and octamer from Themiste zostericola and for octamer protein from Phascolopsis gouldii.

TL;DR: Solution studies have shown that the malonate ion may be readily displaced from the complex, especially by chloride ion, and at low pH, and the implications of this finding for in vivo drug administration are discussed.

TL;DR: The mechanism by which ferritin sequesters iron was studied and the relative iron saturation level offerritin influenced the rate of chelation by the microbial siderophores.

TL;DR: The effectiveness of eight thiol ligands for removing methylmercury (CH3Hg(II) from its glutathione and hemoglobin complexes in hemolyzed erythrocytes has been studied by 1H nuclear magnetic resonance spectroscopy.

TL;DR: In this article, the methylmercury-d, l -selenocysteinate monohydrate complex was characterized by single-crystal X-ray diffractometry.

TL;DR: Investigation of copper(II) substituted human and bovine carbonic anhydrases B in the presence of bicarbonate through water-solvent proton nuclear magnetic resonance at variable magnetic fields confirms that HCO3- binds the metal, whereas CO2 interacts with the paramagnetic center at nonbonding distance.

TL;DR: In this article, the rate constant for oxidation of oxymyoglobin (MbO 2 ) by nitric oxide is calculated to be 31 X 10 6 M −1 sec −1 at 10.0°C in phosphate-buffered media at pH 7.0.

TL;DR: The results of a spectroscopic and potentiometric study of the copper-II and nickel-II complexes of the thyrotropin releasing factor (L-pyroglutamyl-l-histidyl-L-prolinamide, TRF) and some of its di- and tripeptide analogues are reported in this paper.

TL;DR: The results of 1H spin-echo Fourier transform (SEFT) nuclear magnetic resonance (nmr) experiments suggest that some aurothiomalate binds intracellular glutathione (GSH) when added to suspensions of red cells in vitro.

TL;DR: The main fate of the compounds injected appeared to be stepwise transformation to molybdate and subsequent rapid urinary elimination, and more than 90% of the radioactivity was excreted in urine, compared to less than 5% in the feces.

TL;DR: The heat of precipitation has been determined for the reaction, in aqueous solution, of calcium ion with the phytate anion as mentioned in this paper, and the entropy change has been calculated from the value of the equilibrium constant associated with the reaction.

TL;DR: The interaction of Cu(II) with human lactoferrin has been studied as a function of pH, using electronic and electron spin resonance spectroscopy to demonstrate a difference in the anion binding sites.

TL;DR: Two zinc complexes, trichloroadenininium zinc(II) and C5H6N5Cl3Zn [structure(I)] and a similar complex of Arprinocid, (6-amino-9-(2-chloro-6-fluorobenzyl)purine], C12H10N5FCl4Zn[structure (II)] have been prepared Structure(I) crystallizes in the space group P21/c with a = 8.223(1)A, b =

TL;DR: The kinetics of the binding of cyanide to ferric chloroperoxidase have been studied at 25°C and ionic strength 0.11 M using a stopped-flow apparatus and results in an apparent shift towards higher p K a values of the ionization of a crucial heme-linked acid group.

TL;DR: A number of copper(II) complexes of tridentate ligands with various donor atoms have been studied in an attempt to duplicate the unusual reactivity patterns and accompanying spectral changes of the copper center in galactose oxidase as mentioned in this paper.

TL;DR: The value of the electrostatic potential at the carboxylate group of chondroitin(sulfate), as experienced by a cation, was determined in dependence of cation bonding.

TL;DR: 1H NMR studies allow determination of lifetimes between exchanges for components of equilibria in dimethylformamide and water, and the selenocysteine complex exchanges with a lifetime of about 50 msec at 45°C, approximately one-half that for the slower exchange observed for thiolates.

TL;DR: In this paper, the formation of zinc, cadmium, and mercury with D-penicillamine has been studied by pH titrations, using computer evaluation of the most likely complexes, which were found to be of the general formulas ML, MH 2 L 2, MHL 2 -, ML 2 2−, and ML 3 4−.

TL;DR: In this article, a trans axial ligand of nitrogen-, oxygen-, and sulfur-donor ligand in the trozen glass state at 77°K was investigated in order to understand the electron paramagnetic resonance (epr) spectra of nitrosylhemoproteins.

TL;DR: Electron paramagnetic resonance studies of Co2+ binding to the various sites in the enzyme are presented, and the co2+ bound to all three sites appears to be high spin, consistent with a preponderance of oxyligands in an octahedral environment.