┌─ fig|1040638.4.peg.142 O104:H4 str. LB226692   
                                                                    ├─ Escherichia coli 042   
┌───────────────────────────────────────────────────────────────────┼─ Escherichia coli B171   
┤                                                                   └─ fig|6666666.5357.peg.3086 TY-2482 strain   
└──────────────────────────────────────────────────────────────────── Escherichia coli MS 182-1   
  
Mercuric ion reductase (EC 1.16.1.1) (3)
Others (2)