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Electron density maps and local conformational changes. (A) Electron density map for D778Y. (B) Electron density map for D779Y. (C) Electron density map for D779W. (D) Superposition of BjPutA (gray), D778Y (gold), D779Y (cyan), and D779W (magenta). The cages in panels A–C represent simulated annealing σA-weighted F0 - Fc omit maps contoured at 2.5σ.
