Showing papers in "Journal of Inorganic Biochemistry in 1981"

TL;DR: Details are provided of the stoichiometric transformation through which nitric oxide is converted to nitrate with accompanying oxidation of myoglobin or hemoglobin to the corresponding iron(III) hemoprotein, including an estimate of the rate constant.

TL;DR: The relevance of these observations to rheumatoid arthritis and inflammatory joint diseases is discussed.

TL;DR: It is evident that the site of its action as an antagonist influencing either the absorption or the subsequent metabolic fate of Cu depends upon the ratio Cu/MoS4(2-) in the diet.

TL;DR: Species differences in the response to dietary MoO4(2)- as a metabolic antagonist of Cu are considered briefly and the relationship of such findings to the suggested involvement of MoS4( 2)- or its derivatives in the etiology of Mo-induced Cu deficiency in ruminant animals is considered.

TL;DR: In this paper, it was shown that MnO 2 is the catalyst of oxygen evolution at the oxidation of water by the one-electron oxidant Ru(bpy) 3 3+ in neutral and slightly acidic media.

TL;DR: The epr spectra at 4.2 K of inhibitor derivatives of cobalt carbonic anhydrase have been recorded and a third kind of epr spectrum with a single broad signal is obtained when the inhibitor is in large excess.

TL;DR: The results suggest that the electron-transport cytochrome P-450 system is involved in the reduction of chromate by microsomal systems, which may represent the ultimate carcinogenic form(s) of chromium.

TL;DR: Affinity of dog serum albumin for copper was poorer than for the other albumins, consistent with the absence in the former albumin of the copper binding site present at the amino terminus of the latter albumins.

TL;DR: The results indicate that Al3+, Mn2+, and Cd2+ exerted selective and differential effects on the transport systems of neurotransmitter substances in the synaptosomal membrane.

TL;DR: Evidence that reduced cytochrome c 551 undergoes a pH transition is given by optical spectrophotometry and the nature of the transition is discussed in the context of recent nmr studies and in terms of the Marcus theory of electron transfer.

TL;DR: Selenocysteine appears to be the predominant form of selenium in ovine heart and liver of a lamb labeled with 75Se-selenite.

TL;DR: In this paper, the Cu(II) interactions with four tetrapeptides were studied by the absorption, circular dichroism, and electron paramagnetic resonance spectra, and the results clearly show that proline residue is a specific structural factor in the formed complexes and, on the other hand, it is a break point in the metal ion coordination to the consecutive peptide bond nitrogens.

TL;DR: The A1(III)-EDTA (1:1) chelate was found to undergo hydrolysis even at pH 5.5, however, EDDHA and HBED each formed a very stable mononuclear chelate with A 1(III) and did not show hydrolytic or polymerization tendencies.

TL;DR: Low molecular weight zinc( II) and copper(II) binding ligands were detected in ultrafiltered human, bovine, and goat milk by the application of the method of modified gel chromatography.

TL;DR: The distinct pH dependence of the esr signals observed in human and dog serum albumin complexes could be correlated to their respective optical spectra changes as a function of pH.

TL;DR: Simple 1:1 adducts of the antitumor complex, Rh 2 (acetate) 4, have been prepared with Adenine and Adenosine, and the binding site assigned as N 7 of the purine ring indicates unequivocally the same binding site for DNA.

TL;DR: In this article, crystallographic and spectroscopic studies were performed on the solid products obtained from magnesium and strontium interaction with carbonate-containing hydroxyapatite under aqueous conditions employing a cyclic pH variation technique.

TL;DR: In this article, Proton nmr spectroscopic evidence is presented for methylmercury(II) binding to deprotonated amino groups in adenosine, 9-methyladenine, guanosine, 1-methylguanosine and cytidine under basic conditions.

TL;DR: Aluminium determinations have been carried out to assess extinction coefficients and reduction of alkaline-ferriheme d1 was found to be affected by the presence of oxygen, but under N2 give the same result with ascorbate and dithionite.

TL;DR: complexes of AU(III) and AU(I) with these nucleosides have been isolated from the reactions at different pH values in aqueous and in methanolic solutions, and the Au atom is believed to be in the (II) oxidation state.

TL;DR: That copper metabolism in kidneys is subject to hormonal influence was indicated by a reduction in the concentrations of copper and (copper, zinc)-metallothionein in ovariectomized rats and by an increase in their concentrations after the administration of progesterone.

TL;DR: The steady-state kinetics of four redox reactions catalyzed by galactose oxidase have been determined and it is indicated that for one-electron oxidants, an enzyme is required.

TL;DR: In this paper, a new type of Cu(II) epr signals have been produced in native and type 2 copper depleted Rhus vernicifera laccase, which are shown to originate from one of the type 3 copper ions that are epr silent in the resting enzyme.

TL;DR: In this paper, the authors proposed an explanation for the variable toxicity of crown ethers in Escherichia coli, showing that the presence of either potassium ion or sodium ion lengthens the lag due to substituted 18-crown-6 ethers.

TL;DR: In this article, the 13.13 C nmr spectra of various thioglucose derivatives have been assigned and a mechanism for the formation of the sulfinic acid derivative from AuSTg is proposed.

TL;DR: It is suggested that an increase in the concentration of thiol compounds in the gastrointestinal tract arising from food, or more probably from microorganism synthesis, could be an explanation for human encephalopathies.

TL;DR: Direct coordination of the substrate to the catalytic metal on which acts as a Lewis acid in both substrate coordination and catalysis is suggested.

TL;DR: There was no significant difference in the rate of autolysis between Mn2+ and Ca2+ in the temperature range 34-47 degrees C, but at 56.8 degrees and 60.2 degrees autolytic activity was slightly more rapid in the presence of Mn2+.

TL;DR: The nucleotide substrate sites of sheep kidney medulla (NA+ + K+)-ATPase are characterized using CrATP, a paramagnetic, substitution-inert substrate analogue probe, and the relaxation rate, 1/T1, of 7Li+ is increased upon addition of CratP to solutions of the ATPase, indicating that the sites for Li+ and CrATp are close on the enzyme.

TL;DR: Results suggest that Cr(III) may alter or regulate gene expressions in mammals and stimulate Mg2+-activated RNA synthesis but not Mn2r-(NH4)2SO4-activated synthesis.