Fig. 2
From: Genome sequences of two closely related strains of Escherichia coli K-12 GM4792
Graphical circular map of the chromosome of Escherichia coli K-12 GM4792 Lac+. The circles from outside to the inside represent: genes on forward strand (colored by COG categories), genes on reverse strand (colored by COG categories), RNA genes (tRNAs red and rRNAs purple), G + C content (peaks out/inside the circle indicate values higher or lower than the average G + C content, respectively), GC skew (calculated as (G-C)/(G + C), green/purple peaks out/inside the circle indicates values higher or lower than 1, respectively)