The crystallization process in Se100–xZnx glassy system is investigated using differential scanning calorimeters (DSC). The samples are prepared by conventional melt-quenching technique in the composition range 2 ≤ x ≤ 20 (at%). Nonisothermal measurements are carried out for different heating rates .The value of the glass transition temperature Tg the crystallization temperature Tc and the crys...

External polysaccharide capsules provide a physical barrier that is employed by many species of bacteria for the purposes of host evasion and persistence. Wzi is a 53 kDa outer membrane β-barrel protein that is thought to play a role in the attachment of group 1 capsular polysaccharides to the cell surface. The purification and crystallization of an Escherichia coli homologue of Wzi is reported...

The synthesis and characterization of a series of RM(DBPh2)2(H2O) complexes (M = Co and Rh) and the X-ray structure of the dinuclear n-PrRh(DH)(DBPh2) 2 (1) obtained by recrystallization of nPrRh(DBPh2)2(H2O) in non coordinating solvent are reported. The crystals of (1) are built up by neutral centrosymmetric dinuclear n-PrRh(DH)(DBPh2) 2 units and CH2Cl2 crystallization molecules in the ratio ...

A second metastable form of the title compound, C12H13N3 (systematic name: 4,6-dimethyl-N-phenyl-pyrimidin-2-amine), was isolated from an attempted co-crystallization experiment with meso-erythriol in dimethyl sulfoxide (DMSO). The crystals of form 2 at 120 K are monoclinic, space group P21/n with Z' = 4 compared to the previously reported triclinic form with Z' = 2 [Sun et al. (2011 ▸). Acta C...

In Escherichia coli and Salmonella enterica, bis-(3'-5')-cyclic dimeric guanosine monophosphate (c-di-GMP), a ubiquitous bacterial second-messenger molecule that participates in many cellular processes, can regulate flagellar motor speed and reduce cell swimming velocity by binding to the PilZ-containing protein YcgR. Here, the crystallization and preliminary X-ray crystallographic analysis of ...

The N-terminal domain of the nucleocapsid protein from Middle East respiratory syndrome coronavirus (MERS-CoV NP-NTD) contains many positively charged residues and has been identified to be responsible for RNA binding during ribonucleocapsid formation by the virus. In this study, the crystallization and crystallographic analysis of MERS-CoV NP-NTD (amino acids 39-165), with a molecular weight o...

Conjugative plasmid transfer is the most important route for the spread of resistance and virulence genes among bacteria. Consequently, bacteria carrying conjugative plasmids are a substantial threat to human health, especially hospitalized patients. Whilst detailed information about the process has been obtained for Gram-negative type-4 secretion systems, little is known about the correspondin...

Crystals of the RSB-66 protein have been grown at 291 K using NaCl as precipitant. In the refinement of the crystallization this protein, the crystallographic PCR method was used and was found to help in obtaining the best crystals more quickly and easily. The diffraction pattern of the crystal extends to 2.7 A resolution in-house. A full set of X-ray diffraction data were collected to 2.7 A fr...

Self-pillared pentasil (SPP) zeolite is a hierarchically-structured zeolite comprised of single-unit cell thick MFI nanosheets arranged in a ‘‘house of cards’’ structure. The nucleation and growth of SPP proceeds through three phases involving the evolution of precursor amorphous nanoparticles to MFI nanosheets and then rotational intergrowth of sheets to produce the SPP morphology. This paper ...

The unique doublecortin-like tandem of two homologous domains is found in certain microtubule-associated proteins such as doublecortin (DCX) and doublecortin-like kinase (DCLK). It is responsible for interactions with tubulin/microtubules and regulates microtubule dynamics. Here, the expression and purification of the tandem from human DCLK (residues 49-280) and of the isolated domains (residue...