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. 2009 Feb 4;96(3):1169–1177. doi: 10.1016/j.bpj.2008.10.017

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Different timescales of pilus elongation and retraction intervals. (a) Cumulative histogram of pilus retraction intervals (MS11_{pilT ind}, 60 pN; circles). (dashed line) Best fit to a single exponential function and (solid line) best fit to a double exponential function with τ_ret1 = 9 ± 1 ms, τ_ret2 = 118 ± 2 ms. (b) Cumulative histogram of pilus elongation intervals (MS11_{pilT ind}, 60 pN; circles). (dashed line) Best fit to a single exponential function and (solid line) best fit to a double exponential function with τ_ext1 = 11.5 ± 0.5 ms, τ_ext2 = 134 ± 3 ms. (c) Pilus retraction intervals obtained from the double exponential fit of cumulative histogram (MS11_{pilT ind}) of pilus retraction intervals. (d) Pilus elongation intervals obtained from the double exponential fit of cumulative histogram of pilus elongation intervals.