<P> Schematic 2 - D cross-sectional view of glycogen . A core protein of glycogenin is surrounded by branches of glucose units . The entire globular granule may contain approximately 30,000 glucose units . </P> <Li> <P> A view of the atomic structure of a single branched strand of glucose units in a glycogen molecule . </P> </Li> <P> A view of the atomic structure of a single branched strand of glucose units in a glycogen molecule . </P> <P> Arabinoxylans are found in both the primary and secondary cell walls of plants and are the copolymers of two sugars: arabinose and xylose . </P>

Where is the energy stored in a polysaccharide