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Electron density recovered for the SFX LCP structure of RC vir . Diffraction data were recorded and processed to 2.25 Å resolution. Electron density recovered for the mobile ubiquinone (QB) was of similar quality to that recovered for other cofactors. 2F obs − F calc electron-density maps (blue) are contoured at 1σ, where σ represents the root-mean-square electron density of the map. The A-branch leading to QA is on the right, whereas the M-branch leading to QB is on the left.
