to investigate the interaction and adsorption of drug and carbon nanotube on human serum albumin, three anti-cancer drugs ([pd(phen)(r-gly)]no3, r = methyl, propyl and amyl) with different hydrophobic tails and anticancer activities were selected. these drugs have better anti-tumor activity and less side effects than that known cis-platinum drug. human serum albumin is also important for drug d...

Kinetic analyses have indicated that moderate hydrostatic pressures, up to some 700 atmospheres, oppose reversible and irreversible denaturations of certain enzyme systems, apparent at temperatures above the normal optimum of the enzyme reaction, as well as at lower temperatures in the presence of denaturants such as alcohol (14). Qualitative observations have shown that such pressures also ret...

The effect of temperature and calcium ions on the denaturation of a recombinant alpha-amylase from Bacillus halmapalus alpha-amylase (BHA) has been studied using calorimetry. It was found that thermal inactivation of BHA is irreversible and that calcium ions have a significant effect on stability. Thus an apparent denaturation temperature ( T (d)) of 83 degrees C in the presence of excess calci...

The coagulation of isoelectric egg albumin solutions, on exposure to ultraviolet radiation, involves three distinct processes, (1) the light denaturation of the albumin molecule, (2) a reaction between the light denatured molecule and water which may be similar to heat denaturation but occurs at a lower temperature, and (3), the flocculation of the denatured molecules to form a coagulum. The li...

Bile Pigments, Protein Interaction, Conformation, Denaturation The chromophore-protein interactions of C-phycocyanin (C-PC) from Spirulina platensis have been studied by following the partial and complete denaturation with UV-Vis spectroscopy. From comparison with published MO calculations, an elongated conformation of the chromophore is sug­ gested for native C-PC, a cyclic one for denatured C...

The structure of circular pea chloroplast DNA (ctDNA) has been analyzed by denaturation mapping. All of the pea ctDNA molecules that were examined had identical gross base sequences. Denaturation maps were constructed at denaturation levels of 2.5%, 22%, and 44%. These denaturation maps showed that the circular pea ctDNA contained six small AT-rich regions on one-half of the DNA molecule, and t...

Effects of pH and milk constituents (milk ultrafiltrate and ~:-casein) on denaturation of fl-lactoglobulin were investigated by a dynamic method based on differential scanning calorimetry. The apparent reaction order of /Ltactoglobulin denaturation by the dynamic method was 2.0 over the pH range of 4.0 to 9.0, which is in fair agreement with results by other investigators using more classical m...

A simple and effective device for investigating heat-induced denaturation of proteins by electrospray ionization mass spectrometry is described. Results are presented for the denaturation as a function of temperature and solution pH of bovine ubiquitin and bovine cytochrome c. These results are in concert with and extend the earlier results of LeBlanc et al. (Org. Mass Spectrom. 1991, 26, 831)....

Fluorescence spectroscopy was used to study some aspects of thermal denaturation of lactate dehydrogenase (LDH) from rabbit muscle, in the absence and presence of urea and NaCl. Thermal denaturation of LDH seems to be one step and a slightly reversible process. The solution pH has an important influence on the LDH thermal denaturation. The interaction of LDH enzyme with NADH ligand was also inv...