┌─ Escherichia coli (1-88/94) K12 (128)  
  ┌────────────────────────────────────────────┴─ Escherichia coli (1-88/94) E2348/69   
┌─┴────────────────────────────────────────────────────────────────── Escherichia coli (3-92/99) K12 (132)  
┤                                         ┌─ Escherichia coli (1-89/90) MS 182-1   
└───────────────────────────────┬─────────┴─ Escherichia coli (1-89/90) MS 145-7   
                                └───────────┬─────── Escherichia coli (1-89/90) K12 (130)  
                                            └─────────────────────┬─ Escherichia coli 042 (1)  
                                                                  └┬─ Escherichia coli K12 (128)  
                                                                   └─ Escherichia coli IAI39 (1)  
  

  
DNA-binding protein HU-alpha
 (3)
  
DNA-binding protein HU-beta
 (3)
  
Integration host factor beta subunit
 (2)
  
Integration host factor alpha subunit
 (1)