Fig. 9

Relative proportion of COG functional categories for the 2094 genomes as well as MetaCHIP predicted recent (with genetic divergence ≤ 1%) and non-recent (with genetic divergence > 1%) HGTs. The boxes in the plot are bound by the 25% to 75% quartile proportions with the thick line being the median value. Q1, Q3 and IQR refer to the 25%, 75% and interquartile range, respectively. The upper whisker refers to the largest observation less than or equal to upper Q3 + 1.5 × IQR, while the lower whisker refers to the smallest observation greater than or equal to Q1 − 1.5 × IQR. The letters on the x-axis indicate COG categories: C (energy production and conversion), D (cell cycle control, cell division and chromosome partitioning), E (amino acid transport and metabolism), F (nucleotide transport and metabolism), G (carbohydrate transport and metabolism), H (coenzyme transport and metabolism), I (lipid transport and metabolism), J (translation, ribosomal structure and biogenesis), K (transcription), L (replication, recombination and repair), M (cell wall/membrane/envelope biogenesis), N (cell motility), O (posttranslational modification, protein turnover and chaperones), P (inorganic ion transport and metabolism), Q (secondary metabolites biosynthesis, transport and catabolism), R (general function prediction only), S (function unknown), T (signal transduction mechanisms), U (intracellular trafficking, secretion and vesicular transport) and V (defence mechanisms)