For this report , we determined the maps of genome - wide RNAP location in time - course experiments after salt shock and compared these data to global gene expression . Our study not only confirmed a massive dissociation of RNAP from the genomic DNA at the early phase of the osmotic stress response , but also identified a hyperdensity of 70 promoter - like sites at the intergenic regions of salt shock response genes , contributing to RNAP redistribution and transcription of salt - responsive genes during osmotic stress response .