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. 2006 Aug 25;189(4):1441–1450. doi: 10.1128/JB.00832-06

FIG. 4.

FIG. 4.

Dose-response assay for β-Gal activity of the reporter strain, SMC-pYH2, in response to synthetic UA159sp. There was a dose-dependent relationship between the quorum-sensing activity and the UA159sp concentration, and the AC50 was ∼25 nM. The half-maximal activation value was calculated using triplicate samples from two independent experiments.