Comparison of gene contents of “ Ca . S. mobilis” and its relatives based on functional categories. Percentages of genes for each COG category in the genomes are calculated for “Ca. S. mobilis” and its relatives based on COG assignment of genes provided by Integrated Microbial Genomes . Averages and standard deviations of the percentages for the eight Comamonadaceae organisms listed in Figure 2 legend are shown.