Number of genes assigned to a functional class (COG) present in the representative plasmid of each lineage. Classes: CO, energy production and conversion, posttranslational modification, protein turnover, chaperones. DJ, cell cycle control, cell division, chromosome partitioning, translation, ribosomal structure and biogenesis. Q, secondary metabolites biosynthesis, transport and catabolism I, Lipid transport and metabolism. GEP, carbohydrate transport and metabolism, amino acid transport and metabolism, inorganic ion transport and metabolism. KT, transcription, signal transduction mechanisms. NU, cell motility, intracellular trafficking, secretion, and vesicular transport. G, carbohydrate transport and metabolism. KL, transcription, replication, recombination and repair. J, translation, ribosomal structure and biogenesis. T, signal transduction mechanisms. E, amino acid transport and metabolism. D, cell cycle control, cell division, chromosome partitioning. H, coenzyme transport and metabolism. F, nucleotide transport and metabolism. C, energy production and conversion. M, cell wall/membrane/envelope biogenesis. U, intracellular trafficking, secretion, and vesicular transport. O, posttranslational modification, protein turnover, chaperones. P, inorganic ion transport and metabolism. V, defense mechanisms. K, transcription. S, function unknown. R, general function prediction only. L, Replication, recombination and repair. NOT IN A COG, COG not defined.