┌───────────── Escherichia coli KO11 (2)  
┤        ┌──────────────────── Escherichia coli TA280   
│       ┌┴──────────────────── Escherichia coli B171 (1)  
└──────┬┴─ Escherichia coli K12 (109)  
       └───────────────────┬─ Escherichia coli 2362-75 (2)  
                           └───────────────────┬──────────────────── Escherichia coli SMS-3-5   
                                               └─ Escherichia coli 83972 (12)  
  

  
Believed to be involved in assembly of Fe-S clusters
 (7)