┌─────────────────────────────────────────────────────────────────── Escherichia coli K12 (131)  
┤                                                                 ┌─ Escherichia coli (1-123/150) 1827-70   
└─────────────────────────────────────────────────────────────────┤ ┌─ Escherichia coli (42-170/191) O157:H7 EDL933 (1)  
                                                                  └┬┴─ Escherichia coli (79-216/228) APEC O1 (28)  
                                                                   └┬─ Escherichia coli (22-144/171) K12 (100)  
                                                                    └─ Escherichia coli (22-150/171) O55:H7 str. CB9615   
  

  
Zinc uptake regulation protein ZUR
 (5)
  
Ferric uptake regulation protein FUR
 (1)