┌─ Escherichia coli MS 196-1   
                                                                     ┌┴─ Escherichia coli 53638 (1)  
                                                                    ┌┴─ Escherichia coli K12 (116)  
                                                                   ┌┴┬─ Escherichia coli O111:H- str. 11128   
┌──────────────────────────────────────────────────────────────────┤ └─ Escherichia coli MS 115-1   
┤                                                                  └─ Escherichia coli O157:H7 EDL933   
│                                                              ┌── Escherichia coli (1-156/157) O157:H7 str. EC4024   
└──────────────────────────────────────────────────────────────┤  ┌─ Escherichia coli (13-162/165) MS 115-1   
                                                               └──┤┌─ Escherichia coli (1-156/158) K12 (27)  
                                                                  └┤┌─ Escherichia coli (1-156/158) B str. REL606 (3)  
                                                                   └┤ ┌─ Escherichia coli (1-156/158) MS 124-1   
                                                                    └┬┴─ Escherichia coli (13-162/162) MS 84-1   
                                                                     └┬─ fig|1040638.4.peg.1981 O104:H4 (1-156/158) str. LB226692 (89)  
                                                                      └┬─ Escherichia coli (1-156/158) 2362-75   
                                                                       └┬─ Escherichia coli (1-142/158) MS 200-1   
                                                                        └─ Escherichia coli (13-168/170) B7A (2)  
  

  
Transcription elongation factor GreB
 (9)
  
Transcription elongation factor GreA
 (6)
  
 Others 
(1)