abstract：:Electron paramagnetic resonance (e.p.r.) studies of thin DNA-chelate films indicate that both the water soluble planar macrocyclic chelates, cobalt (II) tetra (2,3-N-methylpyridinium) porphyrazine (cobalt (II) TMTPPA), and vanadyl (II) 5,10,15,20-tetra-(4-methylpyridinium) porphyrin (Vo (II) TMTPyP) can bind to calf t...

journal_title：Journal of inorganic biochemistry

authors： Dougherty G

更新日期：1988-10-01 00:00:00

abstract：:Four amino acids--alanine, 2,3-diaminopropionic acid, cystine, and cystein--and also one diamine, ethylenediamine, were chelated with 99m-technetium (99mTc), and their renal excretion patterns were studied in rabbits in the presence and absence of two renal tubular transport inhibitors, probenecid and 2,4-dinitropheno...

journal_title：Journal of inorganic biochemistry

authors： Chattopadhyay M,Banerjee S

更新日期：1988-09-01 00:00:00

abstract：:The effect of inositol hexakisphosphate (IHP) on the spectroscopic (EPR and absorbance) properties of the nitric oxide derivative of ferrous naturally glycated human hemoglobin HbA1c (HbA1cNO) has been investigated quantitatively. The results obtained show that 1) both in the absence and presence of IHP, the EPR and a...

journal_title：Journal of inorganic biochemistry

authors： Ascenzi P,Desideri A,Amiconi G,Bertollini A,Bolognesi M,Castagnola M,Coletta M,Brunori M

更新日期：1988-09-01 00:00:00

abstract：:Rat kidney selenium (Se)-containing proteins were studied by isotopic labeling with [75Se]selenite or [75Se]selenomethionine via three routes: oral, intraperitoneal injection, and incubation of kidney slices with the isotope. The two major Se-containing proteins in kidney were fractionated and partially characterized....

journal_title：Journal of inorganic biochemistry

authors： Viljoen AJ,Tappel AL

更新日期：1988-08-01 00:00:00

abstract：:The reaction of N3- with Co,Zn superoxide dismutase, a good analogue of the native Cu,Zn enzyme, was studied in the presence and absence of phosphate, which is known to perturb the spectroscopic properties of the cobalt chromophore in the Co,Zn enzyme. EPR, NMR, and optical titrations demonstrated the formation of dif...

journal_title：Journal of inorganic biochemistry

authors： Desideri A,Paci M,Capo C,Calabrese L,Rotilio G

更新日期：1988-08-01 00:00:00

abstract：:The magnetic properties of intact and freeze-dried blood cells of the tunicate Ascidia nigra and of model vanadium(III) and (IV) compounds as polycrystalline solids and in aqueous solution have been measured up to 50 kOe with a SQUID susceptometer. Corrections for the samples' diamagnetism were extracted from the temp...

journal_title：Journal of inorganic biochemistry

authors： Lee S,Kustin K,Robinson WE,Frankel RB,Spartalian K

更新日期：1988-07-01 00:00:00

abstract：:The results are reported of a potentiometric and spectroscopic study of the H+, Cu2+, and Ni2+ complexes of luteinizing hormone-releasing hormone (LHRH, HL) at 25 degrees C and an ionic strength 0.10 mol dm-3 (KNO3), since there is much evidence that the in vivo release of LHRH is influenced by the concentration of co...

journal_title：Journal of inorganic biochemistry

authors： Gerega K,Kozlowski H,Masiukiewicz E,Pettit LD,Pyburn S,Rzeszotarska B

更新日期：1988-05-01 00:00:00

abstract：:The effect of inositol hexakisphosphate, 2,3-diphosphoglycerate, dextran sulphate, and heparin on the spectroscopic (absorbance, circular dichroism, EPR) properties of the nitric oxide derivative of ferrous dromedary (Camelus dromedarius) hemoglobin was investigated. The results obtained show that: (i) all polyanions ...

journal_title：Journal of inorganic biochemistry

authors： Ascenzi P,Santucci R,Desideri A,Amiconi G

更新日期：1988-04-01 00:00:00

abstract：:The reductive release of ferritin iron by several naturally occurring o-diphenols was studied. The initial rate of iron release was quantified by spectrophotometric measurement of the Fe(ferrozine)3(2+) complex, which absorbs maximally at 562 nm. The initial rate of iron release was dependent upon o-diphenol concentra...

journal_title：Journal of inorganic biochemistry

authors： Boyer RF,Clark HM,LaRoche AP

更新日期：1988-03-01 00:00:00

abstract：:The effect of Cu(II), Ni(II), Zn(II), Mg(II), and Mn(II) on the fluorescence of porcine kidney cytosol leucine aminopeptidase and three of its dansyl(Dns) peptide substrates, Leu-Gly-NHNH-Dns, Leu-Gly-NH(CH2)2NH-Dns, and Leu-Gly-NH(CH2)6NH-Dns, has been investigated. These five metal ions were chosen for study because...

journal_title：Journal of inorganic biochemistry

authors： Lin WY,Van Wart HE

更新日期：1988-01-01 00:00:00

abstract：:An examination was made of the effects of tetrathiomolybdate (TTM), ammonium molybdate (AM), sodium sulphide, and two molybdo amino acids (cysteine-Mo, cysteine-Mo-S) on the distribution of Cu and Zn among proteins in extracts of the livers and kidneys of rats and sheep. Tetrathiomolybdate caused a shift in the chroma...

journal_title：Journal of inorganic biochemistry

authors： Allen JD,Gawthorne JM

更新日期：1987-11-01 00:00:00

abstract：:Folic acid is degraded by cytochrome c in the presence of hydrogen peroxide/tert-butyl hydroperoxide at the C9-N10 bond. The degradation is increased with increasing temperature. When guanidine HCl or benzoate are included in the reaction medium, the amount of folic acid degradation is enhanced. Catalase, formate, and...

journal_title：Journal of inorganic biochemistry

authors： Taher MM,Lakshmaiah N

更新日期：1987-10-01 00:00:00

abstract：:Previous work demonstrated two stimulatory effects of methyl mercury on nucleic acid synthesis: (1) in isolated nuclei, methyl mercury stimulates RNA synthesis which is catalyzed by RNA polymerase II [Frenkel and Randles, J. Biol. Chem. 257, 6275-6279 (1982)]. (2) Brief exposure of purified DNA to methyl mercury incre...

journal_title：Journal of inorganic biochemistry

authors： Frenkel GD,Ducote J

更新日期：1987-10-01 00:00:00

abstract：:The reaction between reduced Pseudomonas cytochrome c551 and cytochrome oxidase with two inorganic metal complexes, Co(phen)3(3+) and Mn(CyDTA)(H2O)-, has been followed by stopped-flow spectrophotometry. The electron transfer to cytochrome c551 by both reactants is a simple process, characterized by the following seco...

journal_title：Journal of inorganic biochemistry

authors： Tordi MG,Silvestrini MC,Adzamli K,Brunori M

更新日期：1987-07-01 00:00:00

abstract：:Binary as well as ternary complexes of Zn(II) with diphenylamine-2,2'-dicarboxylic acid (dpdc), diphenylamine-2-amino-2'-carboxylic acid (dpac), diphenylamine-2-hydroxy-2'-carboxylic acid (dphc), diphenylamine-2-mercapto-2'-carboxylic acid (dpmc), and N-(2-pyridino) anthranilic acid (npa) have been synthesized and cha...

journal_title：Journal of inorganic biochemistry

authors： Sharma RC,Parashar RK

更新日期：1987-03-01 00:00:00

abstract：:The reactions of Fe(II)EDTA, Fe(II)DTPA, and Fe(II)HEDTA with hydrogen peroxide near neutral pH have been investigated. All these reactions have been assumed to proceed through an active intermediate, I1, (Formula: see text) where pac is one of the three polyaminocarboxylates mentioned above. I1, whether .OH radical o...

journal_title：Journal of inorganic biochemistry

authors： Rush JD,Koppenol WH

更新日期：1987-03-01 00:00:00

abstract：:(Cu(CM)A)B(C6H5)4 and Cu(CM)A(OH) X H2O (CM = cimetidine and HA = L-alanine) were prepared and characterized by elemental analysis, TG-DTA, IR, and electronic spectral data and magnetic susceptibility measurements. The EPR spectrum of (Cu(CM)A)B(C6H5)4 shows a distorted octahedral environment for the Cu(II) ion. ...

journal_title：Journal of inorganic biochemistry

authors： Hinojosa M,Ortiz R,Perelló L,Borrás J

更新日期：1987-02-01 00:00:00

abstract：:Complexes of cadmium(II) derivatives with adenine from water or by simulation of physiological conditions are obtained. The complexes have been studied by spectroscopic, conductometric, 1H-NMR, and by TG and DSC measurements. Possible coordination modes of the ligand are proposed. ...

journal_title：Journal of inorganic biochemistry

authors： Fontana A,Maggio F,Pizzino T

更新日期：1987-02-01 00:00:00

abstract：:Hexacyanochromate ion, (Cr(CN)6)3-, was applied to ribonuclease T1 (RNase T1), which specifically cleaves RNA chains at guanylic acid residues. From kinetic studies, this anion was shown to bind to the active site of RNase T1 as a competitive inhibitor. Therefore, the line broadening effect of NMR resonances due to bi...

journal_title：Journal of inorganic biochemistry

authors： Inagaki F,Shimada I

更新日期：1986-10-01 00:00:00

abstract：:Citrate occurs at about 0.1 mM in blood plasma and is the most likely small molecule plasma binder of both Al3+ and Fe3+. This paper assesses published stability constants for citrate binding to each metal ion. From pH 2 to 5 Al3+ forms a neutral complex with citrate that may be absorbed into the body in the upper reg...

journal_title：Journal of inorganic biochemistry

authors： Martin RB

更新日期：1986-10-01 00:00:00

abstract：:Rat liver metallothionein contains two domains, each of which enfolds a separate metal-thiolate cluster. The binding stoichiometry of these clusters depends on the particular metal ion bound. In the aminoterminal beta domain the cluster can accommodate either three Cd(II) ions or six Cu(I) ions. The Cd ions are known ...

journal_title：Journal of inorganic biochemistry

authors： George GN,Winge D,Stout CD,Cramer SP

更新日期：1986-07-01 00:00:00

abstract：:A previous publication [Frenkel, Cain, and Chao, Biochem. Biophys. Res. Commun. 127, 849-856 (1985)] described the observation that double-stranded DNA which was briefly exposed to methyl mercury (MeHg) and purified to remove free methyl mercury was transcribed at a higher rate by RNA polymerase II from wheat germ. Th...

journal_title：Journal of inorganic biochemistry

authors： Frenkel GD,Wilson H,Ducote J

更新日期：1986-06-01 00:00:00

abstract：:The effect on Cu metabolism of two organic Mo compounds, cysteine-Mo (CM) and cysteine-Mo-S (CMS), and of an inorganic compound, tetrathiomolybdate (TTM), was investigated in sheep. Intravenous administration of CMS or TTM increased total plasma Cu concentrations and promoted the appearance of trichloroacetic acid (TC...

journal_title：Journal of inorganic biochemistry

authors： Allen JD,Gawthorne JM

更新日期：1986-06-01 00:00:00

abstract：:Reactions of bacterial Fe(III) cyt b562, HbO2, met Hb and met Mb with Et3PAuCl and Et3PAuNO3 (and some related complexes) have been investigated by electronic absorption and EPR and NMR spectroscopy. Except for met Hb, which denatured, the products were novel high-spin Fe(III) heme proteins. The reactions of cyt b562 ...

journal_title：Journal of inorganic biochemistry

authors： Grootveld MC,Otiko G,Sadler PJ,Cammack R

更新日期：1986-05-01 00:00:00

abstract：:The interaction of phytic acid with Ca(II) has been studied by potentiometric titration and by measurement of free Ca(II) concentrations using an ion Selective electrode. With increasing Ca(II) concentration, the titration curve of phytic acid is displaced to regions of lower pH. In the binding of calcium ions to phyt...

journal_title：Journal of inorganic biochemistry

authors： Martin CJ,Evans WJ

更新日期：1986-05-01 00:00:00

abstract：:The binding of Cu2+ to native and copper-free dopamine beta-monooxygenase has been investigated by potentiometric titrations using a Cu2+-selective electrode. Stoichiometric formation constants have been determined from regression analysis of the resulting titration curves. The results establish a stoichiometry of fou...

journal_title：Journal of inorganic biochemistry

authors： Syvertsen C,Gaustad R,Schrøder K,Ljones T

更新日期：1986-01-01 00:00:00

abstract：:The stability constants of the mixed ligand complexes of L-dopa, L-tyrosine, L-phenylalanine, and dopamine with copper(II) and nickel(II) ions and with 2,2'-bipyridyl and 1,10-phenanthroline were determined pH-metrically at 25 degrees C and an ionic strength of 0.2 mol/dm3 (KCl). Spectral studies were made to establis...

journal_title：Journal of inorganic biochemistry

authors： Kiss T,Gergely A

更新日期：1985-12-01 00:00:00

abstract：:Some new derivatives of Co(II), Co(III), Ni(II), Cu(II), and Zn(II) with 5' AMP have been obtained, characterized by elemental analysis, infrared, electronic, and fluorescence spectroscopy. The activities of these complexes as substitutes of 5' AMP as allosteric activators of glycogen phosphorylase b have been tested....

journal_title：Journal of inorganic biochemistry

authors： Puig P,Terron A,Moreno V

更新日期：1985-11-01 00:00:00

abstract：:The reaction between cyanide and aurothiomalate (Autm) has been studied by 1H and 13C NMR spectroscopy and by uv spectroscopy. At cyanide:Autm ratios greater than or equal to 2, aurocyanide, [Au(CN)2]-, is the sole product but was also produced at lower ratios. Two intermediates were also identified. These were a mixe...

journal_title：Journal of inorganic biochemistry

authors： Graham GG,Bales JR,Grootveld MC,Sadler PJ

更新日期：1985-11-01 00:00:00

abstract：:The reaction of human ceruloplasmin and anion treated ceruloplasmin with diethyldithiocarbamate was studied at pH 5.5. The analysis of optical and EPR spectra at 9 GHz showed that ceruloplasmin contains five paramagnetic copper ions, two of which, X and Y, not involved in enzymatic activity, are chelated by diethyldit...

journal_title：Journal of inorganic biochemistry

authors： Herve M,Garnier-Suillerot A,Tosi L,Steinbuch M

更新日期：1985-10-01 00:00:00

abstract：:The results are reported of a potentiometric and spectrophotometric study of the proton and copper(II) complexes of methionine enkephalin and four related pentapeptides which all show greater biological activity than their parent enkephalin. Measurements were carried out at 25 degrees C and I = 0.10 mol dm-3 (KNO3). A...

journal_title：Journal of inorganic biochemistry

authors： Formicka-Kozlowska G,Pettit LD,Steel I,Livera CE,Kupryszewski G,Rolka K

更新日期：1985-08-01 00:00:00

abstract：:The effects of cadmium on production of cyclic AMP by partially purified chick renal plasma membrane preparations and binding of 125I-parathyrin to the membranes have been investigated. At certain concentrations Cd2+ ions (and Mn2+ ions) markedly stimulated the production of cyclic AMP by the tissue. It was found that...

journal_title：Journal of inorganic biochemistry

authors： Cook DB,Dewar JH,Ershadi SS

更新日期：1985-07-01 00:00:00

abstract：:The importance of electrostatic interactions between buried charges in determining the properties of membrane proteins is considered. It is demonstrated that in some cases altered properties may result from the extraction of a membrane protein into an aqueous medium even when the protein conformation is unperturbed. ...

journal_title：Journal of inorganic biochemistry

authors： Moore GR,Rogers NK

更新日期：1985-03-01 00:00:00

abstract：:When pulsed cytochrome c oxidase is exposed to carbon monoxide in the absence of oxygen the enzyme is converted quickly to its CO-associated mixed valence state. The half-time for this reaction at 0 degree C is about 4 min. This is about 100 times faster than a similar reaction which begins with the resting form of th...

journal_title：Journal of inorganic biochemistry

authors： Morgan JE,Blair DF,Chan SI

更新日期：1985-03-01 00:00:00

abstract：:The transient kinetics of proton pumping and the electron transfer properties of cytochrome oxidase inserted into small unilamellar vesicles have been investigated by stopped-flow spectrophotometry. In the presence of valinomycin, proton pumping and cytochrome c oxidation by cytochrome oxidase are synchronous up to ra...

journal_title：Journal of inorganic biochemistry

authors： Brunori M,Antonini G,Colosimo A,Malatesta F,Sarti P,Jones MG,Wilson MT

更新日期：1985-03-01 00:00:00

abstract：:The resonance Raman spectra of native stellacyanin and its Ni(II) derivative has been investigated. Raman intensity as a function of the exciting frequency shows minima at about 440--460 nm. Moreover, the resonance Raman spectra of the Ni(II) derivative indicate similar symmetry and nature of ligands, namely, one cyst...

journal_title：Journal of inorganic biochemistry

authors： Musci G,Desideri A,Morpurgo L,Tosi L

更新日期：1985-02-01 00:00:00

abstract：:Effect of dietary selenium as sodium selenite on in vivo hematological parameters of Sprague-Dawley rats was examined over a 7-month period. Dietary selenium did not alter total hemoglobin, hematocrits, erythrocyte counts, or the osmotic fragility pattern of rat blood. Selenium-excessive (1.0 ppm) rats showed slightly...

journal_title：Journal of inorganic biochemistry

authors： Hu ML,Chung C,Spallholz JE

更新日期：1984-11-01 00:00:00

abstract：:Extended x-ray absorption fine structure (EXAFS) spectra have been recorded at the Cu edge and Zn edge in native yeast superoxide dismutase and at the Cu edge and Cd edge in the yeast superoxide dismutase derivative, where Zn has been substituted with Cd. Two different metal ligand distances in the range 1.9-2.0 A and...

journal_title：Journal of inorganic biochemistry

authors： Phillips JC,Bauer R,Dunbar J,Johansen JT

更新日期：1984-11-01 00:00:00

abstract：:Cultured rat hepatoma cells (HTC-cells) were used to study the transfer of copper from a well-defined medium to and across the cell membrane and particularly the role of albumin in this process. HTC-cells, maintained in a minimal salt-glucose medium, accumulated far more copper than when maintained in the same medium,...

journal_title：Journal of inorganic biochemistry

authors： van den Berg GJ,van den Hamer CJ

更新日期：1984-10-01 00:00:00

abstract：:A comparative study of the Cu2+ effects, binding and reduction, has been performed on rat liver mitochondria. In the first minutes, Cu2+ (less than or equal to 50 micron) is massively bound and reduced to the extent of 70%-80% while a simultaneous activation of respiration takes place. Then the remaining 20% or so of ...

journal_title：Journal of inorganic biochemistry

authors： Leblondel G,Allain P

更新日期：1984-07-01 00:00:00