1,721,192 research outputs found
C-Heteroarylations of Sugars by Indolylbromomagnesium Salts. Synthesis of 3-(Alditol-1-yl)indoles and Their Cyclization to Indole C-Nucleoside Analogues.
No full textProbing Protein Structure by Solvent Perturbation of NMR Spectra. I. A comparison with photo-CIDNP techniques applied to native a-lactalbumin
No full textWe have suggested elsewhere the use of surface mapping by spin label probes (Esposito et al., 1992). According to this approach, soluble nitroxides are added to a protein solution. Resonances of protons that are accessible to the nitroxide are broadened and bleached out of the spectrum, while resonances in the protein interior remain unaffected. This approach is, in principle, complementary to another technique, photochemically induced dynamic nuclear polarization, which maps the position of aromatic protons on the protein surface. A detailed comparison between the two techniques is necessary for a confident use of the more recent suggested nitroxide perturbation approach. In the present study, we show that the results obtained by the two techniques for the native state of bovine alpha-lactalbumin are fully consistent and may therefore be combined for the study of protein surfaces
STRUCTURE OF THE ZR-89 VIA THE HIGH RESOLUTION ZR-91(P,T)ZR-89 REACTION AND SHELL MODEL CALCULATIONS
No full textPhenol-Acetaldehyde Oligomers. 2. One- and Two-Dimensional 13C NMR and Photochemically Induced Dynamic Nuclear Polarization 1H NMR Studies in Dimethyl Sulfoxide.
No full textSYNTHESIS AND CHARACTERIZATION OF ISOTACTIC CIS-1,4-POLY(3-METHYL-1,3-PENTADIENE)
No full text3-Methyl-1,3-pentadiene has been polymerized with the Al(C2H5)2Cl/Nd(OCOC7H15)3/Al[CH2CH(CH3)2]3 system to crystalline polymers consisting essentially of cis-1,4 units (≥80%). NMR examination has shown that the polymers have an isotactic structure. This conclusion was confirmed by X-ray analyses, which further indicated that cis-1,4 isotactic poly(3-methyl-1,3-pentadiene) exists in polymorphic modifications
Monitoring complexation between some proteins and naphtalene dye by electrospray mass spectrometry
No full textComplexation of the hydrophobic fluorescent dye 1-anilinonaphthalene-8-sulphonate with a number of proteins was examined by electrospray ionization mass spectrometry (ESMS). The apparent agreement between the present data and those obtained by fluorescence spectroscopy underlines the role of ESMS in the overall approach to protein folding and unfolding
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