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. 2017 Aug 31;7:10281. doi: 10.1038/s41598-017-09926-3

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© The Author(s) 2017

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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PAK/pJN-FcsR is impaired for biofilm formation. (a) Pellicle formation assays. The figure shows the pellicles associated to the glass tubes stained with crystal violet after removal of the liquid culture. This assay was performed for PAK, PAK/pJN-FcsR and PAK/pJN-FcsRE₆₀A. The concentrations of L-arabinose used as inducer are indicated. (b) Biofilm formation assays. Biofilm formation on solid surface was evaluated using microtiter dish binding assay for PAK, PAK/pJN-FcsR and PAK/pJN-FcsRE₆₀A. L-arabinose concentrations used are indicated. Crystal violet staining retained on the biofilms was measured spectrophotometrically at 570 nm for quantification. *Indicates statistically significant difference determined by ANOVA and Tukey’s post hoc test (p < 0.05).