┌─ Escherichia coli 53638 (1)  
                                                                     ┌┴─ Escherichia coli O111:H- str. 11128   
                                                                    ┌┴─ Escherichia coli MS 196-1   
                                                                   ┌┴┬─ Escherichia coli K12 (116)  
┌──────────────────────────────────────────────────────────────────┤ └─ Escherichia coli MS 115-1   
┤                                                                  └─ Escherichia coli O157:H7 EDL933   
│                                                              ┌── Escherichia coli O157:H7 str. EC4024   
└──────────────────────────────────────────────────────────────┤  ┌─ Escherichia coli (13-165/165) MS 115-1   
                                                               └──┤┌─ Escherichia coli K12 (27)  
                                                                  └┤┌─ Escherichia coli B str. REL606 (3)  
                                                                   └┤┌─ Escherichia coli 2362-75   
                                                                    └┤ ┌─ Escherichia coli (13-170/170) B7A (2)  
                                                                     └┬┴─ Escherichia coli (1-142/158) MS 200-1   
                                                                      └┬─ Escherichia coli (1-157/161) MS 185-1   
                                                                       └┬─ Escherichia coli (13-170/170) 042 (88)  
                                                                        └┬─ Escherichia coli (13-162/162) MS 84-1   
                                                                         └─ Escherichia coli MS 124-1   
  

  
Transcription elongation factor GreB
 (11)
  
Transcription elongation factor GreA
 (6)