Currently, selenium is the most widely used phasing vehicle for experimental phasing, either by single anomalous scattering or multiple-wavelength anomalous dispersion (MAD) procedures. The use of the single isomorphous replacement anomalous scattering (SIRAS) phasing procedure with selenomethionine containing proteins is not so commonly used, as it requires isomorphous native data. Here it is ...

Hybrid halide perovskites have made significant progress in achievably high photoconversion efficiencies (>25%) and stability as a function of their chemical engineering realized by isomorphous substitution at all three sites AMX3 composition. Whereas the focus current research lies on planar (2D) devices, this work brings forth an innovative structural concept based direct electrospinning majo...

Zeolite LTA was synthesized in the laboratory and loaded with silver ions by isomorphous substitution technique. The silverloaded zeolite A (Ag-LTA) was characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and Fourier transformed infrared (FTIR) spectroscopy. XRD and SEM analysis showed little or no changes in the phase purity of a...

The crystal structure of the extracellular domain of the LDL receptor (LDL-R) was determined in a MAD experiment using 12-tungstophosphate clusters as anomalous scatterers. While useful for phasing, the tungsten clusters rendered the crystals radiation-sensitive and non-isomorphous and profoundly altered the diffraction data, causing complications. The work is presented as a case study for phas...

Results: Molecular replacement studies using cryo-EM reconstructions provided feasible packing schemes for crystals of ribosomes and their two subunits from Thermus thermophilus, and of the large subunits from Haloarcula marismortui. For the large subunits, these studies also confirmed the major heavy-atom sites obtained by single isomorphous replacement combined with anomalous diffraction (SIR...

The synthesis, crystallographic and spectroscopic properties of four divalent isomorphous metal complexes of tetraphenylazadipyrromethene are described.

The four isomers 2,4-, (I), 2,5-, (II), 3,4-, (III), and 3,5-difluoro-N-(3-pyridyl)benzamide, (IV), all with formula C(12)H(8)F(2)N(2)O, display molecular similarity, with interplanar angles between the C(6)/C(5)N rings ranging from 2.94 (11) degrees in (IV) to 4.48 (18) degrees in (I), although the amide group is twisted from either plane by 18.0 (2)-27.3 (3) degrees. Compounds (I) and (II) ar...

These two compounds are isomorphous but show different spin-state behaviour on cooling. This may be influenced by the packing of alkyl vs. alkynyl chains in solid state.

The formation of three types supramolecular coordination cages is described. Tetrasulfonylcalixarene, combined with metallic salts (Ni, Co and Zn) the flexible succinate ligand, led to cages. H bonded induced chirality was observed for both isomorphous