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Biology of the molybdenum cofactor.

Biology of the molybdenum cofactor.

Journal of experimental botany (2007-03-14)

Ralf R Mendel

摘要

The transition element molybdenum (Mo) is an essential micronutrient for plants where it is needed as a catalytically active metal during enzyme catalysis. Four plant enzymes depend on molybdenum: nitrate reductase, sulphite oxidase, xanthine dehydrogenase, and aldehyde oxidase. However, in order to gain biological activity and fulfil its function in enzymes, molybdenum has to be complexed by a pterin compound thus forming the molybdenum cofactor. In this article, the path of molybdenum from its uptake into the cell, via formation of the molybdenum cofactor and its storage, to the final modification of the molybdenum cofactor and its insertion into apo-metalloenzymes will be reviewed.

材料

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Sigma-Aldrich

钼, powder, <150 μm, 99.9% trace metals basis

Sigma-Aldrich

钼, foil, thickness 0.025 mm, ≥99.9% trace metals basis

Sigma-Aldrich

钼, powder, <150 μm, 99.99% trace metals basis

Sigma-Aldrich

钼, foil, thickness 0.1 mm, ≥99.9% trace metals basis

Sigma-Aldrich

钼, powder, 10 μm, ≥99.95% trace metals basis

Sigma-Aldrich

钼, nanopowder, <100 nm particle size (TEM), 99.8% trace metals basis

Sigma-Aldrich

钼, wire, diam. 1.0 mm, 99.95% trace metals basis

Sigma-Aldrich

钼, foil, thickness 1.0 mm, ≥99.9% trace metals basis

钼, foil, 15mm disks, thickness 0.005mm, 99.9%

钼, mesh, 100x100mm, nominal aperture 0.44mm, wire diameter 0.07mm, 50 wires/inch, open area 67%, plain weave mesh

钼, wire, straight, 1000mm, diameter 0.5mm, 99.95%

钼, pellets, 200g, max. size 10mm, 99.9%

钼, wire reel, 1000m, diameter 0.125mm, annealed, 99.95%

钼, pellets, 100g, max. size 10mm, 99.9%

钼, rod, 50mm, diameter 5.0mm, 99.98%

钼, pellets, 50g, max. size 10mm, 99.9%

钼, mesh, 150x150mm, nominal aperture 0.44mm, wire diameter 0.07mm, 50 wires/inch, open area 67%, plain weave mesh

钼, foil, 50x50mm, thickness 0.1mm, annealed, 99.9%

钼, foil, 25mm disks, thickness 0.0125mm, 99.9%

钼, wire reel, 1000m, diameter 0.035mm, as drawn, 99.95%

钼, tube, 500mm, outside diameter 2.0mm, inside diameter 1.3mm, wall thickness 0.35mm, 99.9%

钼, wire, straight, 1000mm, diameter 0.25mm, 99.95%

钼, tube, 100mm, outside diameter 1.0mm, inside diameter 0.7mm, wall thickness 0.15mm, 99.9%

钼, foil, 100x100mm, thickness 0.1mm, annealed, 99.9%

钼, foil, 100x100mm, thickness 0.5mm, annealed, 99.9%

钼, foil, 0.5m coil, thickness 0.05mm, annealed, 99.9%

钼, rod, 150mm, diameter 5.0mm, 99.98%

钼, rod, 100mm, diameter 2.0mm, centerless ground, 99.9%

钼, wire reel, 50m, diameter 0.025mm, hard, 99.95%

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