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Molybdenum and tungsten enzymes: the xanthine oxidase family.

Molybdenum and tungsten enzymes: the xanthine oxidase family.

Current opinion in chemical biology (2006-02-17)

Carlos D Brondino, Maria João Romão, Isabel Moura, José J G Moura

ABSTRACT

Mononuclear molybdenum and tungsten are found in the active site of a diverse group of enzymes that, in general, catalyze oxygen atom transfer reactions. Enzymes of the xanthine oxidase family are the best-characterized mononuclear Mo-containing enzymes. Several 3D structures of diverse members of this family are known. Recently, the structures of substrate-bound and arsenite-inhibited forms of two members of this family have also been reported. In addition, spectroscopic studies have been utilized to elucidate fine details that complement the structural information. Altogether, these studies have provided an important amount of information on the characteristics of the active site and the electron transfer pathways.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Tungsten, foil, thickness 0.25 mm, ≥99.9% trace metals basis

Sigma-Aldrich

Tungsten, powder, 12 μm, 99.9% trace metals basis

Tungsten, foil, 0.1m coil, thickness 0.076mm, coil width 2mm, as rolled, 99.95%

Tungsten, wire reel, 5m, diameter 1.0mm, clean, 99.95%

Tungsten, wire reel, 5m, diameter 0.05mm, gold plated, 99.95%

Tungsten, wire, straight, 300mm, diameter 0.115mm, 99.9+%

Tungsten, wire, straight, 150mm, diameter 0.38mm, 99.9+%

Tungsten, wire reel, 5m, diameter 0.25mm, clean, 99.95%

Tungsten, wire, straight, 300mm, diameter 0.125mm, 99.9+%

Tungsten, wire reel, 5m, diameter 0.2mm, clean, 99.95%

Tungsten, wire, straight, 450mm, diameter 0.38mm, 99.9+%

Tungsten, wire, straight, 300mm, diameter 1.0mm, 99.9+%

Tungsten, wire, straight, 300mm, diameter 0.15mm, 99.9+%

Tungsten, wire, straight, 19.6mm, diameter 0.5mm, 99.9+%

Tungsten, wire reel, 5m, diameter 0.38mm, clean, 99.95%

Tungsten, wire, straight, 300mm, diameter 0.5mm, 99.9+%

Tungsten, foil, 150x150mm, thickness 1.0mm, as rolled, 99.95%

Tungsten, foil, 0.2m coil, thickness 0.05mm, coil width .51mm, as rolled, 99.95%

Tungsten, foil, 100x100mm, thickness 0.2mm, as rolled, 99.95%

Tungsten, foil, 150x150mm, thickness 0.5mm, as rolled, 99.95%

Tungsten, foil, 2m coil, thickness 0.02mm, coil width .5mm, as rolled, 99.95%

Tungsten, foil, 0.2m coil, thickness 0.04mm, coil width 0.7mm, as rolled, 99.95%

Tungsten, foil, 200x200mm, thickness 0.15mm, as rolled, 99.95%

Tungsten, foil, 50x50mm, thickness 0.3mm, as rolled, 99.95%

Tungsten, foil, 0.2m coil, thickness 0.05mm, coil width 1.5mm, as rolled, 99.95%

Tungsten, foil, 1m coil, thickness 0.1mm, coil width .6mm, as rolled, 99.95%

Tungsten, foil, 0.5m coil, thickness 0.6mm, coil width 1mm, as rolled, 99.95%

Tungsten, foil, 100x100mm, thickness 0.5mm, as rolled, 99.95%

Tungsten, foil, 0.5m coil, thickness 0.025mm, coil width .7mm, as rolled, 99.95%

Tungsten, foil, 1m coil, thickness 0.035mm, coil width 1.5mm, as rolled, 99.95%