Figure 4 - full size

 

Figure 4.
Figure 4 OMIT electron-density map around Val424-Arg428 from the subsequent low-occupancy 18NA dimer. The electron-density map was calculated using molecular-replacement solutions of the original high-occupancy dimer and contoured at 1.0 (green mesh). The model fits the electron density well, even before it was included in structural refinement.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2008, 64, 843-850) copyright 2008.