Fig. 2

Distribution of gene functions and orthogroups across the core genomes of 183 species. a Core genome sizes of each species compared to the phylogenetic tree. b Distribution of each species’ core genes to COG functional categories. COG categories with average frequency > 5% are shown, with all others grouped together. c Distribution of each species’ core genes to the most commonly observed functional categories. d Fraction of core genomes with each bacterial ribosomal protein. e Relative positions of the ribosomal proteins appearing in the largest/smallest number of core genomes (structure adapted from PDB:7K00). f Under-characterized orthogroups observed in at least 50% of all core genomes