Abstract The transcriptional antisilencer VirB acts as a master regulator of virulence gene expression in the human pathogen Shigella flexneri. It binds DNA sequences (virS) upstream of VirB-dependent promoters and counteracts their silencing by the nucleoid-organizing protein H-NS. However. its precise mode of action remains unclear. https://www.markbroyard.com/flash-pick-weleda-skin-food-75ml-online-sale-flash-save/