Coverage of the genes belonging to different COG classes. (a) Coverage distribution (mean values) of the genes belonging to each COG class in the DB110 (parental strain) at 28 MPa. Genes belonging to COG classes “J”, “D”, “O”, “M”, “F”, “S” have a significantly higher expression than the global gene expression value (p value < 0.0001), while COG classes “H”, “L”, and the genes coding proteins that do not belong to a COG class (unk) have a lower gene expression. Values determined for all the genes taken together are reported in the first column (all). We obtained similar results at 0.1 MPa and on TW30 strain (data not shown). (b) Comparison between the mean expression values on chr. 1 (1) and chr. 2 (2). It is evident that each COG class has on average a lower expression on chr. 2 (numeric values are reported on Additional file 1: Table S1). Horizontal lines indicate the median value for all the genes of the chrs 1 and 2.
Campanaro et al. BMC Genomics 2012 13:567 doi:10.1186/1471-2164-13-567