Figure 4 - full size

 

Figure 4.
Figure 4 Transition of the WPD-loop between open (light brown) and closed (green) states. The ligand (sulfamic acid, yellow) is shown in ball-and-stick representation and relevant protein residues are shown as sticks colored according to the loop state. The catalytically important water molecule is shown as a red sphere.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2006, 62, 1435-1445) copyright 2006.