┌─ Escherichia coli APEC O1 (5)  
                                          ┌┴──── Escherichia coli UM146   
                                      ┌───┴──── Escherichia coli 536 (4)  
                                  ┌───┴┬──── Escherichia coli WV_060327   
                                 ┌┤    └─ Escherichia coli 83972 (6)  
                                ┌┤└──── Escherichia coli 2362-75   
                               ┌┤└─ Escherichia coli E2348/69 (1)  
                               │└─────────────┬─ Escherichia coli SE15   
┌──────────────────────────────┤              └┬──── Escherichia coli SMS-3-5   
│                              │               └─────────────────────── Escherichia coli M605   
┤                              └────────────────── Escherichia coli NC101 (1)  
│                 ┌───────────── Escherichia coli MS 21-1   
│        ┌────────┴────────────────── Escherichia coli IAI39 (1)  
└────────┤                  ┌─ Escherichia coli FVEC1302 (3)  
         │┌─────────────────┴──── Escherichia coli 042 (1)  
         └┤┌───────── Escherichia coli B354   
          └┤   ┌─ Escherichia coli TA143   
           └───┤┌───────── Escherichia coli TA280   
               ││             ┌───────── Escherichia coli H299   
               └┤            ┌┴─ Escherichia coli E22 (1)  
                │   ┌────────┴──── Escherichia coli B171   
                └───┤┌────────────────── Escherichia coli MS 69-1   
                    └┤                      ┌─ Escherichia coli 53638 (15)  
                     │        ┌─────────────┴──── Escherichia coli 101-1 (7)  
                     └────────┤        ┌─ Escherichia coli MS 107-1   
                              │        │     ┌──── Escherichia coli B185   
                              └────────┤    ┌┴──── Escherichia coli 1044A (23)  
                                       │┌───┴──── Escherichia coli M718   
                                       └┤            ┌─ Escherichia coli E110019 (2)  
                                        │   ┌────────┴───── Escherichia coli MS 124-1 (1)  
                                        └───┤ ┌──── fig|6666666.5357.peg.1811 TY-2482 strain   
                                            └┬┴─ Escherichia coli (1-395/405) O26:H11 str. 11368   
                                             └┬──── Escherichia coli EC4100B   
                                              └─ fig|1040638.4.peg.5275 O104:H4 str. LB226692 (16)  
  
Enterobactin esterase (30)
Enterochelin esterase (2)
Others (2)