Circular genome map of S. periodonticum CRC221.

Circular genome map of S. periodonticum CRC221. From outer to inner rings: (1) GC skew (purple/green); (2) GC content (black); (3) protein-coding genes on the forward strand (colored by COG categories); (4) protein-coding genes on the reverse strand (colored by COG categories); (5) rRNA genes (red); (6) tRNA genes (green). The map illustrates the overall genomic architecture and key features.