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Dihydroxyacetone (/ ˌ d aɪ h aɪ ˌ d r ɒ k s i ˈ æ s ɪ t oʊ n / ⓘ; DHA), also known as glycerone, is a simple saccharide (a triose) with formula C 3 H 6 O 3. DHA is primarily used as an ingredient in sunless tanning products. It is often derived from plant sources such as sugar beets and sugar cane, and by the fermentation of glycerin.
English: Chemical structure of dihydroxyacetone. Français : Structure de la dihydroxyacétone. Galego: Fórmula esquelética da dihidroxiacetona.
Dihydroxyacetone phosphate (DHAP, also glycerone phosphate in older texts) is the anion with the formula HOCH 2 C(O)CH 2 OPO 3 2-. This anion is involved in many metabolic pathways, including the Calvin cycle in plants and glycolysis. [1] [2] It is the phosphate ester of dihydroxyacetone.
Glycerol-3-phosphate dehydrogenase (GPDH) is an enzyme that catalyzes the reversible redox conversion of dihydroxyacetone phosphate (a.k.a. glycerone phosphate, outdated) to sn-glycerol 3-phosphate. [2] Glycerol-3-phosphate dehydrogenase serves as a major link between carbohydrate metabolism and lipid metabolism.
D-Glyceraldehyde is an aldotriose because the carbonyl group is at the end of the chain Dihydroxyacetone is a ketotriose because the carbonyl group is the center of the chain.. A triose is a monosaccharide, or simple sugar, containing three carbon atoms.
[1] [2] The simplest ketose is dihydroxyacetone ((CH 2 OH) 2 C=O), which has only three carbon atoms. It is the only ketose with no optical activity . All monosaccharide ketoses are reducing sugars , because they can tautomerize into aldoses via an enediol intermediate, and the resulting aldehyde group can be oxidised , for example in the ...
The interconversion of the phosphates of glyceraldehyde (glyceraldehyde 3-phosphate) and dihydroxyacetone (dihydroxyacetone phosphate), catalyzed by the enzyme triosephosphate isomerase, is an intermediate step in glycolysis.
The structure of TPI facilitates the conversion between dihydroxyacetone phosphate (DHAP) and glyceraldehyde 3-phosphate (GAP). The nucleophilic glutamate 165 residue of TPI deprotonates the substrate, [4] and the electrophilic histidine 95 residue donates a proton to form the enediol intermediate.