Glucosidic bonds are chemical linkages formed between two monosaccharides or polysaccharides. They form through the hydrolysis of the anomeric carbon's hydroxyl group in a heterocycle and another hydroxyl group of the conjoined saccharide. H20 is removed from the molecules and they become joined by an oxygen atom. Glucosidic bonds are important to the formation of complex polysaccharides. In chemical formulas they are usually noted by a parenthesis and the numbers of the two carbons being joined. For example, a bond between the first carbon of one saccharide's heterocycle and the fourth carbon of another's would give (1->4). In a formular, it would look like β-D-glucopyranosyl-(1->4)-β-D-glucopyranose (cellobiose is this molecule's much less cumbersome name).

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