Differential regulation of Synechocystis genes across multiple perturbations. Differential regulation of genes was assessed by using a statistical significance test. Only 68 data sets generated under various environmental and genetic perturbations had sufficient number of replicates to be considered for the determination of such differential regulation of genes. All but 5 genes present on chromosome (3259/3264) were identified as differentially regulated in at least one experimental data set. The complete data sets with their respective fold changes are provided in the additional file 2.