Determination of actin filament bending persistence lengths.

<p><b>A</b>. Representative fluorescence images of bare actin and cofilactin filaments. Cofilin binding density is >0.9. Scale bars are 5 µm. <b>B</b>. Cosine correlation data of bare actin (filled squares) and cofilactin filaments (filled circles) (N = 300 filaments). Solid lines represent best fits to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0094766#pone.0094766.e002" target="_blank">equation 2</a> (cosine correlation) yielding L_p = 8.8±0.9 µm, L_p = 2.8±0.6 µm, for bare actin filaments and cofilactin filaments, respectively. <b>C</b>. End-to-end analysis data of bare and cofilactin filaments. Solid lines represent best fits to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0094766#pone.0094766.e004" target="_blank">equation 3</a>, L_p = 10.8±1.8 µm, L_p = 3.8±1.2 µm, for bare actin filaments and cofilactin filaments, respectively.