Words similar to narg

Example sentences for: narg

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5 target sites like other Fnr-regulated class II promoters [ 16 ] . By analogy to the CAP transcription regulator [ 17 18 ] , the proposed mechanism for Fnr activation of gene expression involves its ability to promote open complex formation by RNA polymerase [ 13 16 19 ] . As suggested by the appearance of DNase I hypersensitive cleavage sites, a change in the DNA conformation occurs upon Fnr binding at the dmsA promoter [ 7 8 ] . The presence of hypersensitive DNase I cleavage sites at other FNR-regulated promoters as well as DNA bending experiments support this conclusion [ 8 20 ] . Furthermore, recent studies propose the protein-protein interaction of σ 70and Fnr at the narG and dmsA promoters [ 7 21 22 23 ] . Finally, for each of the site-directed mutations of the Fnr binding site in this study, the level of dmsA-lacZ expression was not significantly altered in an fnr deletion strain either aerobically or anaerobically, indicating that the Fnr-independent expression from the dmsA promoter was not affected by the sequence alterations (Figure 1).