Figure 3 - full size

 

Figure 3.
Figure 3 Monomer structures observed in PhoMPGP crystals. (a) Apo-form open conformation. (b) Apo-form closed conformation. (c) Holo-form closed conformation, with the phosphate and magnesium ions shown as a stick model and as a sphere, respectively.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2008, 64, 1267-1276) copyright 2008.