Figure 2 Genes flux analysis and functional classification of
niche specifying genes. A. Loss and gain of gene families (blue, gain;
red, loss) in gene content since the last common ancestor (numbers in
black). The size of the pie chart reflects the amplitude of total gene
flux (gain + loss). B. COG functional classification of genes lost in
the Apibacter genome. See Dataset S2 for complete list of gene
families with annotations and COG category abbreviations. C. Venn
diagram shows gene family distribution among the three major groups:Apibacter group, Clade C and Clade E.