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Subject - Biochemistry

Glycosides belong to a class of compounds in which a non-carbohydrate moiety (so-called aglycon) is covalently linked to one or more sugar molecules. Depending on the atom (O, S, N or C) in the glycosidic bond, they are classified as O-glycosides, S-glycosides, N-glycosides or C-glycosides.

Though the aglycon is the actual carrier of the pharmacological or toxic activity of glycosides, the attached sugar molecules contribute to the activity. Because of the chemically bonded and water soluble sugar molecules, glycosides are more soluble in aqueous liquids, e.g. blood, than the pure aglycon. Therefore, glycosides are better reabsorbed by the organism and increase the physiological effectiveness.