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Electron micrographs (EM) of MreB structures. Electron micrographs of (A and B) GTP-MreB and (C) ATP-MreB filament structures are shown. The inset shows that MreB without nucleotides does not form filaments. The MreB concentration in panels A to C is 0.5 mg/ml. Scale bars, 0.2 μm.
