- Novel bacterial molybdenum and tungsten enzymes: three-dimensional structure, spectroscopy, and reaction mechanism.
Novel bacterial molybdenum and tungsten enzymes: three-dimensional structure, spectroscopy, and reaction mechanism.
Biological chemistry (2005-10-13)
Matthias Boll, Bernhard Schink, Albrecht Messerschmidt, Peter M H Kroneck
PMID16218872
ABSTRACT
The molybdenum enzymes 4-hydroxybenzoyl-CoA reductase and pyrogallol-phloroglucinol transhydroxylase and the tungsten enzyme acetylene hydratase catalyze reductive dehydroxylation reactions, i.e., transhydroxylation between phenolic residues and the addition of water to a triple bond. Such activities are unusual for this class of enzymes, which carry either a mononuclear Mo or W center. Crystallization and subsequent structural analysis by high-resolution X-ray crystallography has helped to resolve the reaction centers of these enzymes to a degree that allows us to understand the interaction of the enzyme and the respective substrate(s) in detail, and to develop a concept for the respective reaction mechanism, at least in two cases.
MATERIALS
Product Number
Brand
Product Description
Tungsten, foil, 0.2m coil, thickness 0.05mm, coil width .51mm, as rolled, 99.95%
Tungsten, foil, 0.2m coil, thickness 0.02mm, coil width .1mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.016mm, coil width .36mm, as rolled, 99.95%
Tungsten, foil, 100x100mm, thickness 0.1mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.05mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, foil, 0.5m coil, thickness 0.08mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 0.2m coil, thickness 0.10mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.035mm, coil width .75mm, as rolled, 99.95%
Tungsten, foil, 0.2m coil, thickness 0.1mm, coil width .6mm, as rolled, 99.95%
Tungsten, foil, 1m coil, thickness 0.1mm, coil width .6mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.035mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, foil, 1m coil, thickness 0.025mm, coil width 1mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.08mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 1m coil, thickness 0.08mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 0.5m coil, thickness 0.1mm, coil width .6mm, as rolled, 99.95%
Tungsten, foil, 0.2m coil, thickness 0.1mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.6mm, coil width 1mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.02mm, coil width .1mm, as rolled, 99.95%
Tungsten, foil, 0.5m coil, thickness 0.035mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, foil, 2m coil, thickness 0.10mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 0.5m coil, thickness 0.1mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, foil, 0.5m coil, thickness 0.04mm, coil width 0.7mm, as rolled, 99.95%
Tungsten, foil, 5m coil, thickness 0.10mm, coil width .9mm, as rolled, 99.95%
Tungsten, foil, 1m coil, thickness 0.035mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, foil, 0.5m coil, thickness 0.6mm, coil width 1mm, as rolled, 99.95%
Tungsten, foil, 5m coil, thickness 0.1mm, coil width 1.5mm, as rolled, 99.95%
Tungsten, mesh, 50x50mm, nominal aperture 0.2mm, wire diameter 0.05mm, 100 wires/inch, open area 64%, plain weave mesh, 99.95%
Tungsten, insulated wire, 20m, conductor diameter 0.075mm, insulation thickness 0.02mm, PTFE (polytetrafluoroethylene) insulation, 99.9%
Tungsten, foil, not light tested, 50x50mm, thickness 0.005mm, 99.95%
Tungsten, insulated wire, 0.5m, conductor diameter 0.015mm, insulation thickness 0.002mm, polyimide insulation, 99.9%