GEO DataSets

(Submitter supplied) cDNA microarray analysis to identify genes regulated by the RNA chaperone, Hfq. Four experiments were performed: 1/ Hfq+ vs Hfq- strains. 269 significantly differentially regulated genes were identified by SAM (Statistical Analysis of Microarrays), of which 120 changed more than 1.5 fold (48 increased and 72 decreased in hfq-). Amongst other genes, these experiments identified significant regulation of the sigma E and sigma 32 regulons. more...

Organism:

Escherichia coli

Type:

Expression profiling by array

Platforms:

GPL3500 GPL2928 GPL4620

21 Samples

Download data

(Submitter supplied) DNA microarray analysis of genes regulated by the alternative sigma factor, sigma 32 (rpoH). Sigma 32-dependent genes were initially identified by comparing a wild type (wt) E. coli K-12 strain that has a low level of sigma 32, with a strain over-expressing sigma 32 (following induction of rpoH from an inducible promoter by IPTG). We monitored changes in gene expression in 4 separate time-courses. Because sigma 32 is negatively regulated, its activity decreases 10 min after overexpression. more...

Organism:

Escherichia coli

Type:

Expression profiling by array

Dataset:

GDS1804

Platform:

GPL3500

16 Samples

Download data