┌─ Escherichia coli (7-161/166) TA271   
                       ┌┴─ Escherichia coli (7-161/166) MS 124-1 (1)  
                 ┌─────┴─ Escherichia coli (7-161/166) MS 182-1   
┌────────────────┴────┬─────────────────────────────────────────────── Escherichia coli (17-172/174) 536 (20)  
┤                     └───────── Escherichia coli (24-181/183) ABU 83972 (1) [2] 
│                                                       ┌─ Escherichia coli S88   
└───────────────────────────────────────────────────────┤┌─ Escherichia coli B171 (8)  
                                                        └┤  ┌─ Escherichia coli O157:H7 str. EC4024 (9)  
                                                         │ ┌┴─ Escherichia coli MS 116-1 (1)  
                                                         └┬┴─ Escherichia coli O157:H7 EDL933 (1)  
                                                          └┬─ Escherichia coli 101-1   
                                                           └┬─ Escherichia coli K12 (99)  
                                                            └┬─ Escherichia coli M605 (1)  
                                                             └─ Escherichia coli MS 124-1   
  

  
Transcription repressor
 (9)
  
putative regulator PapX protein
 (4)
  
HTH-type transcriptional regulator papX
 (1)