Table 2 COG functional classification of genes at the unique node connections of the six main clades

[S] Function unknown

[R] General function prediction only

[G] Carbohydrate transport and metabolism

[L] Replication, recombination and repair

[J] Translation, ribosomal structure and biogenesis

[M] Cell wall/membrane/envelope biogenesis

[K] Transcription

[E] Amino acid transport and metabolism

[H] Coenzyme transport and metabolism

[P] Inorganic ion transport and metabolism

[F] Nucleotide transport and metabolism

[O] Posttranslational modification, protein turnover, chaperones

[U] Intracellular trafficking, secretion, and vesicular transport

[V] Defense mechanisms

[D] Cell cycle control, cell division, chromosome partitioning

[T] Signal transduction mechanisms

[C] Energy production and conversion

[I] Lipid transport and metabolism

[Q] Secondary metabolites biosynthesis, transport and catabolism

[N] Cell motility

total