┌─ Escherichia coli (12-168/185) 1044A (23)  
                                                      ┌┴─ Escherichia coli (1-157/174) O157:H7 str. EC4024 (1)  
┌─────────────────────────────────────────────────────┴─ Escherichia coli (12-168/185) K12 (77)  
│                                                ┌─────────────────── Escherichia coli (2-175/175) O157:H7 str. EC4024   
┤                                                │   ┌─ Escherichia coli MS 21-1   
│                                                │   │    ┌─ Escherichia coli H299   
└────────────────────────────────────────────────┤   │   ┌┴─ Escherichia coli B185   
                                                 │   │  ┌┴┬─ Escherichia coli B354   
                                                 │   │ ┌┤ └─ Escherichia coli MS 69-1 (1)  
                                                 └───┤ │└┬─ Escherichia coli NC101   
                                                     │┌┤ └─ Escherichia coli 042 (1)  
                                                     ││└─ Escherichia coli 53638 (3)  
                                                     ││     ┌─ Escherichia coli 2362-75 (1)  
                                                     ││    ┌┴─ Escherichia coli ED1a (1)  
                                                     └┤   ┌┴─ Escherichia coli 536 (12)  
                                                      │  ┌┴─ Escherichia coli SE15   
                                                      │ ┌┴─ Escherichia coli APEC O1 (6)  
                                                      │┌┴─ Escherichia coli FVEC1302 (4)  
                                                      └┤┌─ Escherichia coli MS 115-1   
                                                       └┤┌─ Escherichia coli 1044A (25)  
                                                        └┤┌─ Escherichia coli IAI1 (3)  
                                                         └┤ ┌─ fig|1040638.4.peg.4175 O104:H4 str. LB226692 (6)  
                                                          │┌┴─ Escherichia coli E22 (2)  
                                                          └┤┌─ Escherichia coli SMS-3-5   
                                                           └┤ ┌─ Escherichia coli ETEC H10407   
                                                            └┬┴── Escherichia coli MS 107-1   
                                                             └┬─ Escherichia coli SE11   
                                                              └─ Escherichia coli K12 (36)  
  
Transcriptional regulator yidN, Cro/CI family (24)
Putrescine utilization regulator (3)
Others (1)