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. 2011 Jan 11;6(1):e15876. doi: 10.1371/journal.pone.0015876

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Plummer et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A: SDS-PAGE gel of recombinant LuxS proteins from 81116AI2- and 81116AI2+ Lane 1: rLuxS- (expected MW = 18.1 kD), the recombinant 81116AI2- 6HIS-tagged LuxS Protein, Lane 2: rLuxS+ (expected MW = 18.1 kD), the 81116AI2+ 6HIS-tagged LuxS Protein, Molecular weight markers as shown. B: Enzymatic activity of recombinant LuxS protein measured by Vibrio harveyi bioluminescence assay. SRH alone with no enzyme provides a negative control. BB152 is cell-free supernatent of V. harveyi BB152 as a positive control.