Figure 3 - full size

Figure 3.
Figure 3. Stereo view of a modeled structure of the PGA-octagalacturonate complex. The electrostatic potential is drawn at the solvent accessible surface of polygalacturonase from -9kT/e^ - (red) to +9kT/e^ - (blue) and the substrate is represented with a space-filling model. The N terminus is on the top and the C terminus on the bottom. The unbent substrate spans the binding cleft that is formed by the protruding loop regions T1 (left side) and T4 (right side). The Figure was produced with GRASP.[57]