┌─ Escherichia coli (15-140/142) B str. REL606 (3)  
                                                          ┌┴─ Escherichia coli (15-140/142) B354   
                                                         ┌┴─ Escherichia coli (15-140/142) K12 (116)  
                                                        ┌┴─ Escherichia coli (15-140/142) HS (1)  
┬───────────────────────────────────────────────────────┴─ Escherichia coli (15-140/142) MS 115-1   
└───────────────────────────────────────────────────────┬──────────── Escherichia coli O157:H7 str. EC4024   
                                                        └┬─ Escherichia coli TA206   
                                                         └┬─ Escherichia coli K12 (128)  
                                                          └┬─ Escherichia coli 042 (1)  
                                                           └─ Escherichia coli MS 78-1   
  

  
Tol biopolymer transport system, TolR protein
 (5)
  
Biopolymer transport protein ExbD/TolR
 (5)