Figure 3 - full size

 

Figure 3.
Figure 3. Stereo-pair diagrams of the active form of ChoK. In (a) the top view and (b) the side view, the two catalytic residues Glu122 and Glu309 are depicted with a ball-and-stick model (blue for the active form and red for the inactive form). (c) The pH-sensitive Glu122 adopts two conformations.

The above figure is reprinted by permission from Elsevier: J Mol Biol (2004, 343, 785-795) copyright 2004.