Ketohexose A ketose SUGAR with six carbon atoms, e.g. fructose. 一种六碳的酮糖。例如果糖。
Glucose cyclizes to form asix- membered pyranose ring whilst five –carbon surgars and six-carbon ketose sugars (ketohexoses) such as fructnose rings. 环状结构 四碳糖和更大的糖能环化,醛基或酮基与糖的另一碳原子上的羟基反应。
A ketose is a monosaccharide containing one ketone group per molecule.
With three carbon atoms, dihydroxyacetone is the simplest of all ketoses and is the only one having no optical activity. Ketoses can isomerize into an aldose when the carbonyl group is located at the end of the molecule. Such ketoses are reducing sugars.