Define glycogen , Biology

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A glycogen molecule having entirely of glucose units, many of that are linked in long chains through α1-4 bonds.  Furthermore,  every  10  units  or  so,  the  chain  is branched  by the Formation  of an α1-6  glycosidic  bond. Every straight- chain segment of glycogen establish an open helix conformation that enhances its accessibility to the enzymes of glycogen metabolism.  Each chain terminates in a nonreducing end, which is, an end with a free 4′ OH group.

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