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 Tollens' test or Benedict's test. (wikipedia.org)
Ketoses that are bound into glycosides, for example in the case of the fructose moiety of sucrose, are nonreducing sugars. (wikipedia.org)
Chemical tanning is based on the formation of melanin-mimetic cutaneous pigments ('melanoidins') from spontaneous amino-carbonyl ('glycation') reactions between epidermal amino acid/protein components and reactive sugars including the glycolytic ketose dihydroxyacetone (DHA). (cdc.gov)
A striking difference was found between aldose and ketose sugars as suggested by the modeling results: not the ketoses themselves but only their reaction products were found to be reactive in the Maillard reaction. (nih.gov)
Ketone group2
A ketose is a monosaccharide containing one ketone group per molecule. (wikipedia.org)
Ketoses are monosaccharides containing a ketone group at the end of the chain. (answers.com)
Aldoses6
Ketoses and aldoses can be chemically differentiated through Seliwanoff's test, where the sample is heated with acid and resorcinol. (wikipedia.org)
The test relies on the dehydration reaction which occurs more quickly in ketoses, so that while aldoses react slowly, producing a light pink color, ketoses react more quickly and strongly to produce a dark red color. (wikipedia.org)
Ketoses can isomerize to aldoses through the Lobry-de Bruyn-van Ekenstein transformation. (wikipedia.org)
Aldoses and ketoses are two types of sugar molecules. (answers.com)
Aldoses and ketoses are essential components of biological systems and play a key role in energy storage metabolism and other metabolic processes. (answers.com)
It does not reduce common aldoses and ketoses, or non-sugar aldehydes and ketones [1]. (enzyme-database.org)
Dihydroxyacetone2
The simplest ketose is dihydroxyacetone, which has only three carbon atoms. (wikipedia.org)
All ketoses listed here are 2-ketoses, in other words, the carbonyl group is on the second carbon atom from the end: Trioses: dihydroxyacetone Tetroses: erythrulose Pentoses: ribulose, xylulose Hexoses: fructose, psicose, sorbose, tagatose Heptoses: sedoheptulose Octoses: D-manno-octulose (the basis for KDO) Nonoses: D-glycero-D-galacto-nonulose (the basis for neuraminic acid) Lindhorst, Thisbe K. (2007). (wikipedia.org)
Glycolytic1
The second enzyme in the glycolytic pathway, phosphoglucose isomerase (PGI), catalyses an intracellular aldose-ketose isomerization. (nih.gov)
Protein3
In keratinocytes, DHA-exposure performed at low millimolar concentrations did not impair viability while causing a pronounced cellular stress response as obvious from rapid activation of phospho-protein signal transduction [p-p38, p-Hsp27(S15/S78), p-eIF2a] and gene expression changes (HSPA6, HMOX1, CRYAB, CCL3), not observable upon exposure to the non-ketose, tanning-inactive DHA-control glycerol. (cdc.gov)
Kan for mye protein slå meg ut av ketose? (keto-mojo.com)
Kan for meget protein sparke mig ud af ketose? (keto-mojo.com)