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107 citations found for Lee, Y
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The crystal structure of EcoMinCNTD dimerized via domain swapping was solved at 2.3 Å resolution. The present study suggests that EcoMinC dimerizes through both EcoMinCNTD and EcoMinCCTD.
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Structures of C. difficile alanine racemase in complex with the PLP cofactor and cycloserine are presented.
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L-Arabinose isomerase from G. kaustophilus was overexpressed, purified and crystallized, and a preliminary X-ray diffraction data set was obtained.
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A detailed analysis of multiple diffraction data collected by the stereoscopic multibeam imaging technique from a tetragonal lysozyme crystal is reported. The proposed procedures provide a practical way of reconstructing diffraction profiles for experimental phase determination for macromolecular crystals.
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A discharge flow-photoionization mass spectrometric system coupled to a synchrotron is employed to study intermediates and products of sulfur radical reactions related to atmospheric chemistry. Sulfur radicals are generated from reactions of oxygen or chlorine atoms with sulfur compounds in a flow tube. The gaseous reaction products are sampled into the ionization region via a three-stage differential pumping scheme. Photoionization spectra and ionization energies are measured by dispersing synchrotron radiation to ionize the samples. Using this technique, photoionization spectra and ionization energies of HSO, CH3SO, C2H5SO, HSCl, and some secondary reaction products, SSCl, HSSCl, HSSSH, CH3SOH and CH3SS(O)CH3, were measured for the first time.
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In the title compound, [HgCl2(C15H26N2)], the chiral alkaloid (6R,7S,8S,14S)-(−)-L-sparteine acts as a bidentate ligand, with two Cl− ligands occupying the remaining coordination sites, producing a distorted tetrahedron. The N—Hg—N plane is twisted by 81.1 (2)° from the Cl—Hg—Cl plane. The mid-point of the N
N line does not lie exactly on the Cl—Hg—Cl plane but is tilted towards one of the N atoms by 0.346 Å. Similarly, the mid-point of the Cl
Cl line is tilted toward one of the Cl atoms by 0.163 Å. The packing structure shows that the complex is stabilized by two interatomic Cl
H contacts involving both Cl atoms and the methylene or methine H atoms of the (−)-sparteine ligand.
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The structure of the title compound, (C10H16N2)[CuCl4], comprises two crystallographically non-equivalent tetrahedral [CuCl4]2- anions, each of which is linked to two doubly protonated nicotinium cations via hydrogen bonds. There are two different types of hydrogen-bonding interactions present, namely (i) the protonated pyridinium groups exclusively form bifurcated hydrogen bonds to two cis-Cl atoms of both [CuCl4]2- units and (ii) the protonated pyrrolidinium groups exclusively form a two-center hydrogen bond with a chloride of both [CuCl4]2- units.
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The first observation of X-ray multiple-wave interaction in an incommensurate charge-density-wave (CDW) modulated structure at low temperatures is reported for an example of a quasi-two-dimensional material, NbSe2-2H.
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The title compound, C24H20Br2N2O4, is an 18-membered tricycle including two isoxazole rings. The asymmetric unit contains one half of the formula unit; a centre of inversion is located at the centroid of the compound. The dihedral angle between adjacent isoxazole and benzene rings is 84.0 (2)°. The compound displays intra- and intermolecular π–π stacking interactions between the isoxazole rings, the shortest centroid–centroid distances being 3.837 (3) and 3.634 (3) Å, respectively. The molecules are stacked in columns along the a axis with short Br
Br contacts [3.508 (1) Å].
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In the title amide, C16H15F2NO3, the dihedral angle between the benzene rings is 53.7 (1)°. Molecules are linked in the crystal structure by an intermolecular N—H
O hydrogen bond involving N—H and C=O functionalities of the amide group. A one-dimensional network is thus formed along the [001] direction. No significant interchain contacts are observed.
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