Sulfide oxidation is catalyzed by ancient membrane-bound sulfide:quinone oxidoreductases (SQR) which are classified into six different types. For catalysis of sulfide oxidation, all SQRs require FAD cofactor and a redox-active centre in the active site, usually formed between conserved essential cysteines. types have variation number position cysteines, highlighting potential for diverse cataly...

A single-sheeted double many-body expansion potential energy surface is reported for the lowest doublet state of HN2 by fitting additional multireference configuration interaction energies in the N...NH channel. A stratified analysis of the root-mean-squared error indicates an accuracy superior to that achieved for the previously reported form. Detailed dynamical tests are also performed for th...

The contribution deals with preparation of C60 fullerene derivatives (oxo derivative, bromo derivative, hydrolyzed bromo derivative, bromo-ch loro derivative), their identification and pilot testing of their biological effects on unicellu lar organisms. The contribution describes effects of C60 fullerene derivatives, both on prokaryotic organisms (bacteria, cyanobacteria) and eukaryotic organis...

A new staining procedure for glucose oxidase at both the light and the electron microscopic level has been developed. The procedure was equally effective for the detection of galactose oxidase. It appears that the method can be applied to all oxidoreductases which catalyze the production of hydrogen peroxide. Aspergillus niger glucose oxidase and Dactylium dendroides galactose oxidase were used...

This review provides an overview of the biochemistry of thiol redox couples and the significance of thiol redox homeostasis in neurodegenerative disease. The discussion is centred on cysteine/cystine redox balance, the significance of the xc(-) cystine-glutamate exchanger and the association between protein thiol redox balance and neurodegeneration, with particular reference to Alzheimer's dise...