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It can be classified as either a methyl-pentose or a 6-deoxy-hexose. Rhamnose predominantly occurs in nature in its L-form as L-rhamnose (6-deoxy-L-mannose). This is unusual, since most of the naturally occurring sugars are in D-form. Exceptions are the methyl pentoses L-fucose and L-rhamnose and the pentose L-arabinose.
Mannose (D-mannose) is used as a dietary supplement to prevent recurrent urinary tract infections (UTIs). [ 9 ] [ 10 ] As of 2022 [update] , one review found that taking mannose was as effective as antibiotics to prevent UTIs, [ 9 ] while another review found that clinical trial quality was too low to allow any conclusion about using D ...
In enzymology, a mannose-6-phosphate 6-reductase (EC 1.1.1.224) is an enzyme that catalyzes the chemical reaction. D-mannitol 1-phosphate + NADP + D-mannose 6-phosphate + NADPH + H + Thus, the two substrates of this enzyme are D-mannitol 1-phosphate and NADP +, whereas its 3 products are D-mannose 6-phosphate, NADPH, and H +.
This page was last edited on 4 October 2008, at 13:37 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
The enzyme GDP-Mannose 4, 6-Dehydratase is in the lyase family of enzymes, specifically the hydro-lyases. Other names in use include guanosine 5'-diphosphate-D-mannose oxidoreductase, guanosine diphosphomannose oxidoreductase, guanosine diphosphomannose 4,6-dehydratase, GDP-D-mannose dehydratase, GDP-D-mannose 4,6-dehydratase, GMD, and GDP-mannose 4,6-hydro-lyase.
In enzymology, a phosphomannomutase (EC 5.4.2.8) is an enzyme that catalyzes the chemical reaction. alpha-D-mannose 1-phosphate D-mannose 6-phosphate. Hence, this enzyme has one substrate, alpha-D-mannose 1-phosphate, and one product, D-mannose 6-phosphate.
GDP-mannose is produced from GTP and mannose-6-phosphate by the enzyme mannose-1-phosphate guanylyltransferase. The degradation of mannans (and many related forms of hemicellulose) has been well studied. The hydrolysis of the main mannan backbone is catalyzed by various enzymes including β-mannosidase, β-glucosidase, and β-mannase.
Hydrolysis of terminal, non-reducing β-D-mannose residues in β-D-mannosides This gene encodes a member of the glycosyl hydrolase 2 family . The encoded protein localizes to the lysosome where it is the final exoglycosidase in the pathway for N -linked glycoprotein oligosaccharide catabolism.
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