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Adenine-dependent global tertiary structural changes of the full-length add Asw analyzed by smFRET. FRET histograms of the L2/L3-labeled, the L2/P5-labeled and the L3/P5-labeled add Asw in absence and presence of 100 μM adenine at 2 mM Mg2+. A schematic representation of each FRET construct in the apo conformations is depicted above. For the FRET histograms of the L2/L3-labeled construct, the fractional population of the docked state D is indicated in percent.
