ID #1603

Do glycosidic linkages and condensation always occur no matter which type of monosaccharides you join together? I know glycosidic linkages and condensation occur when two hexose sugars join, but what about when non-hexose (i.e. triose, pentose, etc.) sugars join? I was doubtful because all the examples of monosaccharides joining and forming glycosidic linkages used two hexose sugars.

In theory, any hydroxyl group on a monosaccharide is a substrate (target) for a glycosidic linkage. And yes, all glycosidic linkage formations are condensation reactions. But in reality, no biologically relevant disaccharides that I'm aware of are formed from a hexose and a non-hexose sugar.

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