┌─ Escherichia coli (3-426/445) 536 (1)  
                                             ┌┴─ Escherichia coli (3-426/445) 042 (2)  
                                            ┌┴┬─ Escherichia coli (3-426/445) 1125A (1)  
                                           ┌┤ └─ Escherichia coli (3-426/445) TA280   
                                           │└┬─ Escherichia coli (3-426/445) E2348/69   
               ┌───────────────────────────┤ └┬─ Escherichia coli (3-426/445) K12 (110)  
               │                           │  └─ Escherichia coli (3-426/445) B str. REL606   
┌──────────────┤                           └─ Escherichia coli (3-426/445) O26:H11 str. 11368   
│              └─────────────────────────────────────┬─────────────── Escherichia coli (24-443/454) F11 (4)  
│                                                    └────────────┬─ Escherichia coli (1-424/444) ED1a (1)  
│                                                                 └┬─ Escherichia coli (1-424/444) IAI39 (1)  
┤                                                                  └┬─ Escherichia coli (1-424/444) K12 (119)  
│                                                                   └┬─ Escherichia coli (1-424/444) O157:H7 EDL933 (1)  
│                                                                    └─ Escherichia coli (1-424/444) MS 196-1   
│                                                     ┌─ Escherichia coli SMS-3-5   
│                                                     │  ┌─ Escherichia coli H299   
└─────────────────────────────────────────────────────┤ ┌┴─ Escherichia coli MS 21-1   
                                                      │┌┴─ Escherichia coli IAI39 (1)  
                                                      ││  ┌─ Escherichia coli ED1a (8)  
                                                      └┤ ┌┴─ Escherichia coli APEC O1 (1)  
                                                       │┌┴─ Escherichia coli O83:H1 str. NRG 857C   
                                                       └┤┌─ Escherichia coli MS 45-1   
                                                        └┤  ┌─ Escherichia coli B088   
                                                         │ ┌┴─ Escherichia coli M718   
                                                         └┬┴─ Escherichia coli E24377A (1)  
                                                          └┬─ Escherichia coli K12 (67)  
                                                           └┬─ Escherichia coli 55989 (1)  
                                                            └┬─ Escherichia coli (1-436/437) O157:H7 str. EC4206   
                                                             └─ Escherichia coli 1044A (24)  
  
Putrescine/proton symporter, putrescine/ornithine antiporter PotE (15)
Arginine/agmatine antiporter (8)
Lysine/cadaverine antiporter membrane protein CadB (6)