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(A) Linear map of 6.4 kb of genomic DNA flanking S. gordonii luxS. Predicted ORFs and their orientations are shown. A predicted stem-loop structure between ORF2 and luxS is indicated. (B) Schematic representations of the chromosomal regions encompassing the ermAM-disrupted gene of the S. gordonii luxS mutant and the tandem disrupted and intact gene copies of the complemented luxS mutant. The image is not drawn to scale.
