A unique conformation of deoxynucleoside triphosphate substrates bound to Escherichia coli DNA polymerase I has been determined by nuclear magnetic resonance techniques. The effects of Mn(I1) bound at the active site of the enzyme on the longitudinal (Ti,‘) and transverse (T;;,‘) relaxation rates of the 01, /3, and y phosphorus atoms and 5 protons of enzyme-bound thymidine 5’.triphosphate (dTTP...

A unique conformation of deoxynucleoside triphosphate substrates bound to Escherichia coli DNA polymerase I has been determined by nuclear magnetic resonance techniques. The effects of Mn(II) bound at the active site of the enzyme on the longitudinal (T1p-1) and transverse (T2p-1) relaxation rates of the alpha, beta, and gamma phosphorus atoms and 5 protons of enzyme-bound thymidine 5'-triphosp...

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An ion storage technique, based on the capture of metastable multiply charged ions from an external ion source into a Kingdon ion trap, has been used to measure the lifetimes of eight metastable levels of Mn ions with 3s3p configurations, k51 – 4. Although several lifetime calculations exist, some of the transition wavelengths have not been previously observed in any source. The lifetimes range...

This paper presents aspects of the coordination chemistry of mono- and divalent manganese complexes supported by the anionic tris(phosphino)borate ligand, [PhBP(i)(Pr)3] (where [PhBP(i)(Pr)3] = [PhB(CH(2)P(i)Pr2)3]-). The Mn(II) halide complexes, [PhBP(i)(Pr)3]MnCl (1) and [PhBP(i)(Pr)3]MnI (2), have been characterized by X-ray diffraction, SQUID magnetometry, and EPR spectroscopy. Compound 2 s...

Abstract The crystal and molecular structures of the fluorocymantrenes [(C 5 H 4 F)Mn(CO) 3 ] 5−n F n )Mn (CO) 2 (PPh )] (n = 1–3) have been studied. influence phosphine for carbonyl substitution on bond parameters is larger than increasing fluorine content. In most cases Mn → P vector in a transoid position relative to substituents, therefore conformational PPh propeller are these very similar...

The effects of Mn on electrical and mechanical activities in the circular muscle of the guinea-pig stomach were investigated. A low concentration of Mn (0.1 mM) in Krebs solution caused a prolongation of the first component, resulting in an increase in frequency of the second component. However, a high concentration of Mn (more than 1 mM) had a similar effect on the electrical activities in the...

The title compound, disodium dimanganese(II) tris-[ortho-molybdate(VI)], was prepared by solid-state reactions. The structure can be described as being composed of Mn2Mo2O14 double-chains that are inter-connected by corner-sharing with MoO4 tetra-hedra, leading to a three-dimensional framework with channels propagating in [100] and [001] in which the Na(+) counter-cations are located. One of th...