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. 2017 Apr 19;7:943. doi: 10.1038/s41598-017-01176-7

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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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Diffusion agar-plate assay to detect AHL degradation using the biosensors Chromobacterium violaceum CV026, C. violaceum VIR07 and Agrobacterium tumefaciens NTL4 (pZLR4). Cell-free LB medium (1), E. coli S17 λ pir (2) and E. coli S17 λ pir harbouring the fosmid f10/17.1H (3) were supplemented with the same quantities of C₄-HSL, C₆-HSL, 3-O-C₆-HSL, C₈-HSL, 3-O-C₈-HSL, C₁₀-HSL, 3-OH-C₁₀-HSL, C₁₂-HSL, 3-O-C₁₂-HSL and C₁₄-HSL.