The history of research on photosynthetic reaction centers is outlined, starting with the implication of their existence through the discovery of the photosynthetic unit, as reported by R. Emerson and W. Arnold in 1932, and culminating in the crystallization and X-ray analysis of the anoxygenic bacterial reaction centers, reported by J. Deisenhofer, H. Michel, and coworkers, over the period 198...

The asymmetric unit of the title compound, [Cu(C(26)H(22)N(2)O(2))]·C(2)H(5)OH, comprises a Schiff base complex and an ethanol mol-ecule of crystallization. The Cu(II) atom shows a distorted square-planar geometry. The dihedral angle between the two aromatic rings is 48.16 (13)°. The crystal structure is stabilized by inter-molecular O-H⋯O and C-H⋯O hydrogen bonds and inter-molecular π-π inter-...

The title hydrated salt, 2C(5)H(8)N(3) (+)·C(8)H(5)O(4) (-)·NO(3) (-)·H(2)O, was obtained fortuitously from the reaction between 2,6-diamino-pyridine, phthalic acid and Co(NO(3))(2)·6H(2)O at 343 K. The asymmetric unit consists of two crystallographically independent 2,6-diamino-pyridinium cations, a hydrogen phthalate anion, a nitrate ion and a water mol-ecule of crystallization which in the c...

A lectin from Canavalia maritima seeds (ConM) was purified and submitted to crystallization experiments. The best crystals were obtained using the vapour-diffusion method at a constant temperature of 293 K and grew in 7 d. A complete structural data set was collected to 2.1 A resolution using a synchrotron-radiation source. The ConM crystal belongs to the orthorhombic space group P2(1)2(1)2, wi...

THE ASYMMETRIC UNIT OF THE TITLE COMPOUND [SYSTEMATIC NAME: benzamidinium 3,3',5,5'-tetra-hydr-oxy-1,1'-spirobi[2,4,6-trioxa-1,3,5-triboracyclo-hexa-ne](1-) sesquihydrate], C(7)H(9)N(2) (+)·B(5)H(4)O(10) (-)·1.5H(2)O, is composed of two protonated benzamidinium cations, two tetra-hydro-penta-borate anions and three water mol-ecules of crystallization. The ions and water molecules are associated...

This paper reports a new packing type of α-cyclodextrin inclusion complexes, obtained here with succinic acid under low-temperature crystallization conditions. The structure of the 1:1 complex is characterized by heavy disorder of the guest, the solvent, and part of the host. The crystal packing belongs to the known channel-type structure; the basic structural unit is composed of cyclodextrin t...

The asymmetric unit of the title compound, C(9)H(9)NO(2)·2H(2)O, comprises two independent organic mol-ecules and four water mol-ecules of crystallization. The heterocyclic rings are not planar: in one mol-ecule, the C atom bearing the O atom and the adjacent methyl-ene C atom are displaced by 0.320 (3) and 0.677 (3) Å, respectively, from the other eight atoms of the fused ring system. Equivale...

Alpha-L-Arabinofuranosidase (EC 3.2.1.55) is one of the hemicellulases that cleave the glycosidic bonds between L-arabinofuranoside side chains and various oligosaccharides. In this study, the first crystallization and preliminary X-ray analysis of alpha-L-arabinofuranosidase B from Aspergillus kawachii IFO4308 (AkAbfB), a family 54 glycoside hydrolase, is described. Recombinant AkAbfB was expr...

The plant hormones cytokinins play a central role in regulating cell division and developmental events. Cytokinin oxidase regulates the levels of these plant hormones by catalyzing their irreversible oxidation, which contributes to the regulation of various morpho-physiological processes controlled by cytokinins. In this study, the crystallization and preliminary X-ray diffraction analysis of t...

Herein, single crystals of compounds In2S3, AgIn5S8 and solid solutions (In2S3)x·(AgIn5S8)1–x were grown by directional crystallization. The composition the obtained was determined microprobe X-ray spectral analysis. It is found that content components in satisfactory agreement with specified initial charge. structure materials method. shown both based on them crystallized cubic spinel. unit ce...