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Pulling experiments. (A) A few pulling cycles for the RNA hairpin showing the unfolding (red) and folding (blue) trajectories. (B) Experimental distribution for the unfolding first rupture forces at 1.8 pN/s (red filled squares) and 12.5 pN/s (blue filled circles), and for the folding first rupture forces at 1.8 pN/s (red empty squares) and 12.5 pN/s (blue empty circles).
