┌─────────────────── Escherichia coli (13-256/256) 042 (1)  
┌──────────────┴─ Escherichia coli TA143   
│    ┌─ Escherichia coli FVEC1302 (4)  
┤    │ ┌─ Escherichia coli B354 (4)  
│    │┌┴─ Escherichia coli APEC O1 (5)  
└────┤│                        ┌─ Escherichia coli O157:H7 EDL933   
     ││                       ┌┴─────────────────────────────────────── Escherichia coli O55:H7 str. CB9615   
     ││                      ┌┴─ Escherichia coli 1125A (13)  
     └┤                     ┌┴──────────────────── Escherichia coli (1-234/251) O157:H7 str. EC4206   
      │  ┌──────────────────┴┬─ Escherichia coli O157:H7 EDL933   
      │ ┌┤                   └─ Escherichia coli O157:H7 str. EC4024 (4)  
      │┌┤└─────────────────── Escherichia coli NC101 (1)  
      ││└─ Escherichia coli (13-255/255) APEC O1 (20)  
      └┤ ┌──────────────────── Escherichia coli B7A (3) [2] 
       │┌┴──────────────────── Escherichia coli KO11 (2)  
       ││ ┌─────────────────── Escherichia coli M718   
       └┤┌┴─────────────────── Escherichia coli B185   
        ││                   ┌─ Escherichia coli (13-257/257) E2348/69 (1)  
        └┤┌──────────────────┴─ Escherichia coli 2362-75   
         ││                   ┌─ Escherichia coli (13-256/256) ATCC 8739 (2)  
         └┤┌──────────────────┴─ Escherichia coli 101-1 (9)  
          ││                                       ┌─ Escherichia coli B171 (6)  
          └┤                                      ┌┴──────────────────── Escherichia coli H591   
           │                   ┌──────────────────┴─ fig|1040638.4.peg.4572 O104:H4 str. LB226692 (9)  
           └──────────────────┬┴──────────────────── Escherichia coli TA271   
                              └──────────────────┬─ Escherichia coli BW2952 (6)  
                                                 └┬─ Escherichia coli MS 115-1   
                                                  └┬──────────────────── Escherichia coli MS 196-1   
                                                   └─ Escherichia coli K12 (2)  
  
Ferric siderophore transport system, periplasmic binding protein TonB (27)
Ferric siderophore transporter, periplasmic energy transduction protein TonB (1)
Others (1)