Search results
Results from the WOW.Com Content Network
Xylose isomerase has a structure that is based on eight alpha/beta barrels that create an active site holding two divalent magnesium ions. Xylose isomerase enzymes exhibit a TIM barrel fold with the active site in the centre of the barrel and a tetrameric quaternary structure. [15] PDB structures are available in the links in the infobox to the ...
In this pathway the enzyme xylose isomerase converts D-xylose directly into D-xylulose. D-xylulose is then phosphorylated to D-xylulose-5-phosphate as in the oxido-reductase pathway. At equilibrium, the isomerase reaction results in a mixture of 83% D-xylose and 17% D-xylulose because the conversion of xylose to xylulose is energetically ...
Glucose isomerase (also known as xylose isomerase) catalyzes the conversion of D-xylose and D-glucose to D-xylulose and D-fructose. Like most sugar isomerases, glucose isomerase catalyzes the interconversion of aldoses and ketoses. [24] The conversion of glucose to fructose is a key component of high-fructose corn syrup production.
Foods containing artificial sweeteners like sorbitol (present in some diet drinks and foods and occurring naturally in some stone fruits), xylitol (present in some berries) and other polyols (sugar alcohols, such as erythritol, mannitol and other ingredients that end with -tol, commonly added as in commercial foods).
Xylose (cf. Ancient Greek: ξύλον, xylon, "wood") is a sugar first isolated from wood, and named for it. Xylose is classified as a monosaccharide of the aldopentose type, which means that it contains five carbon atoms and includes an aldehyde functional group. It is derived from hemicellulose, one of the main constituents of biomass. Like ...
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
The TIM barrel (triose-phosphate isomerase), also known as an alpha/beta barrel, [1]: 252 is a conserved protein fold consisting of eight alpha helices (α-helices) and eight parallel beta strands (β-strands) that alternate along the peptide backbone. [2] The structure is named after triose-phosphate isomerase, a conserved metabolic enzyme. [3]
A xyloside is a type of glycoside derived from the sugar xylose. Proteoglycan (PG) synthesis is initiated by the transfer of D-xylose from UDP-xylose to a serine residue in core proteins. This natural primer acts as a template for the assembly of heparin sulfate, heparin, chondroitin sulfate, and dermatan sulfate side