┬──────────────────────────────────────────────────────────────────── Escherichia coli (48-283/288) MS 196-1   
└───────────────────────────────────────────────────────────────────┬─ Escherichia coli (35-294/294) MS 84-1   
                                                                    └┬─ Escherichia coli (35-294/294) 101-1 (7)  
                                                                     └─ Escherichia coli B171 (1)  
  
Permease of the drug/metabolite transporter (DMT) superfamily (4)