ketosidic

Ketosidic refers to a type of glycosidic bond where the anomeric carbon is part of a ketone functional group. Glycosidic bonds are covalent bonds that link a carbohydrate molecule to another group, which can be another carbohydrate or a different type of molecule. In the case of ketosidic bonds, the linkage occurs at the carbon atom that is double-bonded to oxygen in a ketone. This contrasts with aldrosidic bonds, where the linkage occurs at the anomeric carbon of an aldehyde.

Ketosidic bonds are found in certain carbohydrates, particularly disaccharides and polysaccharides. For example, fructose, a common ketose sugar, can form ketosidic bonds. Sucrose, a disaccharide composed of glucose and fructose, contains a ketosidic linkage between the anomeric carbon of fructose and the anomeric carbon of glucose. The formation and hydrolysis of ketosidic bonds are catalyzed by specific enzymes. These bonds play a role in the structure and function of various biological molecules, including storage polysaccharides and structural components. Understanding the nature of ketosidic bonds is important in carbohydrate chemistry and biochemistry for studying sugar metabolism, energy storage, and the properties of complex carbohydrates.