┌─ Escherichia coli (17-444/461) 042   
                                                              ┌┴─ Escherichia coli (17-444/461) FVEC1302 (3)  
                                                             ┌┴─ Escherichia coli (17-444/461) TA143   
                                                            ┌┴┬─ Escherichia coli (17-444/461) MS 69-1   
                                                           ┌┤ └─ Escherichia coli (17-447/461) H299   
                                                           │└┬─ Escherichia coli (17-447/461) 2362-75 (6)  
                                                          ┌┤ └┬─ Escherichia coli (31-455/469) MS 200-1   
                                                          ││  └─ Escherichia coli (17-447/461) 536 (20)  
┌─────────────────────────────────────────────────────────┤└┬─ Escherichia coli (17-444/461) K12   
│                                                         │ └─ Escherichia coli (17-444/461) 101-1 (83)  
│                                                         └─ Escherichia coli (17-444/461) MS 187-1   
│                                                     ┌─ Escherichia coli (13-464/499) MS 21-1   
│      ┌──────────────────────────────────────────────┴─ Escherichia coli (13-464/499) APEC O1 (7)  
│      │                                                                  ┌─ Escherichia coli (2-428/437) O157:H7 str. EC4206   
┤      │                                                                 ┌┴─ Escherichia coli (2-427/439) 1044A (24)  
│      │                                                                ┌┴─ Escherichia coli (2-427/439) B088   
│      │                                                               ┌┴┬─ Escherichia coli (2-427/439) M718   
│      │                                                              ┌┤ └─ Escherichia coli (2-427/439) E24377A (1)  
│      │                                                             ┌┤└─ Escherichia coli (2-427/439) K12 (67)  
│      │                                                             │└┬─ Escherichia coli (2-427/439) MS 45-1   
└──────┤                                                            ┌┤ └─ Escherichia coli (2-427/439) 55989 (1)  
       │                                                            │└┬─ Escherichia coli (2-427/439) O83:H1 str. NRG 857C   
       │                                                           ┌┤ └┬─ Escherichia coli (2-427/439) APEC O1 (1)  
       │                                                           ││  └─ Escherichia coli (2-427/439) ED1a (8)  
       │                                                           │└┬─ Escherichia coli (2-427/439) IAI39 (1)  
       │                ┌──────────────────────────────────────────┤ └┬─ Escherichia coli (2-427/439) MS 21-1   
       │                │                                          │  └─ Escherichia coli (2-427/439) H299   
       │                │                                          └─ Escherichia coli (2-427/439) SMS-3-5   
       │                │                                         ┌─ Escherichia coli (2-424/444) MS 196-1   
       └────────────────┤                                        ┌┴─ Escherichia coli (2-424/444) IAI39 (1)  
                        │                                       ┌┴─ Escherichia coli (2-424/444) K12 (119)  
                        │                                      ┌┴─ Escherichia coli (2-424/444) O157:H7 EDL933 (1)  
                        │                             ┌────────┴─ Escherichia coli (2-424/444) ED1a (1)  
                        │   ┌─────────────────────────┴───────── Escherichia coli (24-453/454) F11 (4)  
                        └───┤                 ┌─ Escherichia coli O26:H11 str. 11368   
                            └─────────────────┤┌─ Escherichia coli HS (4)  
                                              └┤ ┌─ Escherichia coli TA280   
                                               │┌┴─ Escherichia coli B str. REL606   
                                               └┤┌─ Escherichia coli K12 (105)  
                                                └┤ ┌─ Escherichia coli 1125A (1)  
                                                 └┬┴─ Escherichia coli 042 (2)  
                                                  └┬─ Escherichia coli 536 (1)  
                                                   └─ Escherichia coli E2348/69   
  
Putrescine/proton symporter, putrescine/ornithine antiporter PotE (15)
Probable transport protein yifK (11)
Arginine/agmatine antiporter (9)
Lysine/cadaverine antiporter membrane protein CadB (6)
Arginine/ornithine antiporter ArcD (2)