Figure 13 - full size

 

Figure 13.
Figure 13 A close-up view of the ornithine binding pocket. Ordered water molecules are indicated by the red spheres. The carboxylate group of ornithine interacts with the allosteric domain while the -amino group of the side chain forms hydrogen bonds with amino-acid residues from the carbamoyl phosphate synthetic component.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (1999, 55, 8-0) copyright 1999.