Figure 1 - full size

Figure 1.
Figure 1. The cavity in CCP W191G. A transparent surface is displayed showing four ordered water molecules (red) and one potassium ion (green) in the cavity of the apo-structure. Water molecule 308 is conserved in all structures. (This Figure was made using PyMOL (www.pymol.org, as were Figure 4 and Figure 5).)