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. 2020 Aug 13;10:13697. doi: 10.1038/s41598-020-70763-y

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Two components involved in the binding of p53 to DNA. (A) Typical kymographs of p53 obtained at the time resolution of 500 μs and at different salt concentrations. (B) Residence time distributions of p53 bound to DNA in the presence of different salt concentrations. Solid curves represent the best-fitted curves using the sum of two exponentials. (C) Salt-concentration dependence of the time constants obtained by the two exponential fitting. The τ₂ values obtained in the presence of 140, 145, and 150 mM KCl were statistically different from that in 50 mM KCl based on the two-tailed t test (p < 0.05). (D) Salt-concentration dependence of the amplitudes obtained by the two exponential fitting. The errors in panels (C,D) denote the standard errors calculated from the results of at least three measurements.