Phylogenetic analyses of ProQ/FinO domain-containing proteins (related to Fig. 5 and Dataset S1). (A) Taxonomic repartition of the 2,775 complete prokaryotic proteomes available at NCBI regarding the ProQ/FinO domain-containing proteins. (B) Number of ProQ/FinO domain-containing proteins per proteome in the 2,775 complete prokaryotic proteomes available at NCBI. (C) Distribution according to the encoding gene location. ProQ/FinO domain-containing proteins are colored in black, orange, or purple when their coding gene is located on the chromosome, a plasmid, or a secondary chromosome, respectively. (D) Architecture of the different ProQ/FinO domain-containing proteins. For each cluster (numbers on the tree), multiple members were aligned using BlastP, and conserved domains are shown. The C-terminal part of the proteins (after the ProQ/FinO domain) was aligned to extract the possible region of high similarity.