┌─ Escherichia coli (332-425/445) 042 (3)  
┬──────────────────────────────────────────────────────────────────┴─ Escherichia coli (332-425/445) K12 (108)  
└───────────────────────────────┬─────────────────────── Escherichia coli (353-446/454) F11 (4)  
                                └───────────────────────────────────┬─ Escherichia coli (334-444/444) M718   
                                                                    └─ Escherichia coli (334-444/444) K12 (130)  
  
Lysine/cadaverine antiporter membrane protein CadB (3)
Arginine/agmatine antiporter (2)