A, Chromosome (CI); B , Plasmid (PI). Circles range from 1 (outer circle) to 6 (inner circle) for CI and I (outer circle) to IV (inner circle) for PI. Circles 1/I and 2/II, genes and forward and reverse strand; circle 3, tRNA genes; circle 4, rRNA genes, circle 5/III, GC bias/skew ((G-C)/(G+C); red indicates values >0; green indicates values <0); circles 6/IV, A+T percentage content. All genes are color-coded according to Cluster of Orthologous Group (COG) functions: violet for translation, ribosomal structure and biogenesis; plum for RNA processing and modification; pink for transcription; deep pink for DNA replication, recombination and repair; hot pink for chromatin structure and dynamics; wheat for cell division and chromosome partitioning; light salmon for nuclear structure; yellow for defence mechanisms; gold for signal transduction mechanisms; pale green for cell envelope biogenesis, outer membrane; spring green for cell motility and secretion; lawn green for cytoskeleton; yellow green for extracellular structures; aquamarine for intracellular trafficking, secretion, and vesicular transport; medium aquamarine for posttranslational modification, protein turnover, chaperones; cyan for energy production and conversion; deep sky blue for carbohydrate transport and metabolism; sky blue for amino acid transport and metabolism; light slate blue for nucleotide transport and metabolism; orchid for coenzyme metabolism; medium orchid for lipid metabolism; dark orchid for inorganic ion transport and metabolism; blue violet for secondary metabolites biosynthesis, transport and catabolism; slate grey for general function prediction only; grey for function unknown; gray for not in COGS; black for tRNA.