Circular plot of the chromosome of strain B8. From outside to inside the circles show (a) coding sequences on the forward strand, colored according to the COG category whose code and meaning is given in the table below the plot, (b) coding sequences on the reverse strand, colored according to the COG category, (c) average GC content, calculated for a window of 3,000 bp shifted by 1,000 bp over the genome sequence in each step, (d) GC-skew ((G- C/ G+ C)), calculated for a window of 500 bp, shifted by 200 bp over the genome sequence in each step. For better readability (c) and (d) are scaled up. For each COG category the number of genes belonging to it is shown in brackets in the left legend. For each COG category, the bottom legend shows the letter code, the meaning, and the color of the categories used in the circle plot. The cag-PAI and the plasticity zone are marked by an ellipse on the second inner circle. The plot was created by the software GenDB.