Structure
Glycogen is a branched biopolymer consisting of linear chains of glucose residues with further chains branching off every ten glucoses or so. Glucoses are linked together linearly by α(1→4) glycosidic bonds from one glucose to the next. Branches are linked to the chains they are branching off from by α(1→6) glycosidic bonds between the first glucose of the new branch and a glucose on the stem chain.
Due to the way that glycogen is synthesised, every glycogen granule has at its core a glycogenin protein.
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