Descibe glycogen's structure.
It is composed of mutiple glucose monomers, that have been connected with alpha - 1,4 glycosidic bonds or alpha - 1,6 glycosidic bonds. alpha 1,4 bonds create linear polymer chains and alpha 1,6 bonds create a branch point.
It also has a linear structure that can be reduced by Cu2+. A glycogen chain has two ends, a reducing end (typically at C1) and a reducing end (typically at C4).
In the Beta glycogen particle there are several "tiers" of glycogen chains (12-14 residues long). From the initial primer chain, branching points create secondary chains and so on. Beyond the fourth tier are out chains that don't experience branch points. The branching affect allows easier harvesting of glucose molecules when they are needed and maximizes the amount of glucose that can be stored as glycogen. As each tier is harvisted, subsiquent tiers become harder to harvest.