Figure 4 - full size

Figure 4.
FIGURE 4. Superposition of the active sites of the sulfate bound (yellow) and unbound rCSO (gray). Only the Moco of the sulfate free structure is shown. The molybdenum is shown in green, and the water/hydroxo ligand is shown as a red sphere. Hydrogen bonds between the sulfate and Arg-450 are shown with dashed lines.