We identified a few highly significant genes that were selected for mutagenesis, which are differentially expressed in the presence of sulfapyridine or the 1:1 sulfapyridine:5-aminosalycilate mixture, but not in the presence of sulfasalazine ( Fig. 2 and 3B ).
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The McbR transcription factor links the intracellular folate pool to virulence in enterohemorrhagic <i>Escherichia coli</i>.
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