Figure 4

Species-specific enrichment in intergenic SLSs. The regional enrichment of higher stability SLSs (dG < -10 KCal/mole) completely located within coding (sense and anti-sense) and intergenic regions has been monitored in the 40 bacterial genomes listed in Table 1. Enrichment is expressed as the ratio of the SLS frequencies within each region to average SLS frequencies in the total genome. Letters a to e signal enrichments in intergenic SLSs observed in specific genomes (see Results).