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A histogram of the unfolding force of the PapA rod for a number of unfoldings for two different elongation speeds: 0.1 and 50 μm/s, respectively. The two elongation speeds gave rise to unfolding forces of 28.1 ± 0.7 pN and 57.4 ±1.1 pN and widths of 0.7 pN and 1.1 pN, respectively.
