FIGURE 2.

Protein-ligand interactions in the glycogen-binding sites of Gsy2p. a–d, ribbon representation of the secondary structural elements of the glycogen binding in Gsy2p in site-1–4, respectively. The bound polymer is represented in a cyan ball and stick model, and the 4′-hydroxyl group is labeled. The surrounding amino acids are represented in a ball and stick model and labeled. The residues mutated to alanine for the functional studies of the binding sites are shown in green.