Glycogen has a branched structure as well. It is a polymer consisting of D-glucose units. The glucose units in the linear structure are joined by α(1 → 4) glycosidic linkages and branching occurs via α(1 → 6) linkages (Figure 2.13). The branching point occurs at every eight to ten α-D-glucose units. This type of linkage is widely used in determining it quantitatively in the tissues.

Figure 2.13 Structural Representation of Glycogen