┌─ Escherichia coli (10-428/469) E2348/69 (8)  
                                                     ┌┴─ Escherichia coli (1-402/443) O127:H6 str. E2348/69   
                                                    ┌┴┬─ Escherichia coli (1-419/460) MS 21-1   
                                                   ┌┤ └─ Escherichia coli (1-419/460) K12 (61)  
                                                   │└┬─ Escherichia coli (1-419/460) H299   
                                                  ┌┤ └┬─ Escherichia coli (1-419/460) ED1a (1)  
                                                  ││  └─ Escherichia coli (1-419/460) MS 69-1   
                                                  │└┬─ fig|1040638.4.peg.3652 O104:H4 str. LB226692  [2] 
                                                 ┌┤ └┬─ Escherichia coli (1-419/460) O55:H7 str. CB9615   
                                                 ││  └─ Escherichia coli (1-419/460) 1044A (24)  
                          ┌──────────────────────┤└─ Escherichia coli (1-419/460) TA143 (2)  
┌─────────────────────────┤                      └─ Escherichia coli (1-419/460) APEC O1 (6)  
│                         └───────────────────────┬────────────────── Escherichia coli (11-442/489) APEC O1 (6)  
┤                                                 └──────────────┬─ Escherichia coli (19-452/499) MS 21-1   
│                                                                └─ Escherichia coli (19-452/499) APEC O1 (7)  
│                                                 ┌─ Escherichia coli (8-418/437) O157:H7 str. EC4206   
└─────────────────────────────────────────────────┤┌─ Escherichia coli (8-417/439) 1044A (24)  
                                                  └┤┌─ Escherichia coli (8-417/439) M718   
                                                   └┤┌─ Escherichia coli (8-417/439) K12 (67)  
                                                    └┤┌─ Escherichia coli (8-417/439) 55989 (1)  
                                                     └┤ ┌─ Escherichia coli (8-417/439) MS 45-1   
                                                      │┌┴─ Escherichia coli (8-417/439) E24377A (1)  
                                                      └┤┌─ Escherichia coli (8-417/439) B088   
                                                       └┤  ┌─ Escherichia coli (8-417/439) APEC O1 (1)  
                                                        │ ┌┴─ Escherichia coli (8-417/439) ED1a (8)  
                                                        └┬┴─ Escherichia coli (8-417/439) O83:H1 str. NRG 857C   
                                                         └┬─ Escherichia coli (8-417/439) SMS-3-5   
                                                          └┬─ Escherichia coli (8-417/439) IAI39 (1)  
                                                           └┬─ Escherichia coli (8-417/439) MS 21-1   
                                                            └─ Escherichia coli (8-417/439) H299   
  
Putrescine/proton symporter, putrescine/ornithine antiporter PotE (15)
Arginine/ornithine antiporter ArcD (14)
Others (1)