Fig. 3

Graphical circular map of the genome comparison of E. faecalis S32 with the other five strains. Labeling from the outside to the inside circle: ring 1 and 4 show the protein coding genes on the forward/reverse strand (colored by COG categories); ring 2 and 3 show the denote genes on the forward/reverse strand; ring 5, 6, 7, 8 and 9 show the CDS vs CDS BLAST results of E. faecalis S32 with S1, S18, S12, S19 and S17, respectively; ring 10 shows the G + C content (peaks out/inside the circle indicate values higher or lower than the average G + C content, respectively); ring 11 shows GC skew (calculated as (G - C)/(G + C), peaks out/inside the circle indicates values higher or lower than 1, respectively). Ring 5–9 were arranged based on the CDS BLAST results, with the similarity rank from high to low, that is S1 and S18 were more similar to the reference strain S32 than the other three strains