Figure 3.
Examples of electron densities for GltTk and GltPh structures. (A–C) Representation of electron densities for the conserved NMDGT motif (shown as sticks) in the following structures: (A) GltTk OFC (PDB code 5DWY); (B) GltPh iOFC (PDB code 3V8G); and (C) GltPh with asymmetric IFC protomers (PDB code 4X2S). The 2Fo-Fc electron-density maps (shown in blue mesh) are contoured at 1σ.