┌─ Escherichia coli M718   
                                                                     ┌┴─ Escherichia coli ED1a (2)  
                                                                    ┌┴─ Escherichia coli MS 182-1 (1)  
                                                                   ┌┴┬─ Escherichia coli ABU 83972   
                                                                  ┌┤ └─ Escherichia coli K12 (119)  
                                                                  │└┬─ Escherichia coli TA271   
┌─────────────────────────────────────────────────────────────────┤ └┬─ Escherichia coli TA143   
│                                                                 │  └─ Escherichia coli B354 (3)  
┤                                                                 └─ Escherichia coli MS 115-1   
│                                                                 ┌─ Escherichia coli OP50   
└─────────────────────────────────────────────────────────────────┤┌─ Escherichia coli O26:H11 str. 11368   
                                                                  └┤┌─ Escherichia coli ETEC H10407   
                                                                   └┤┌─ Escherichia coli K12 (87)  
                                                                    └┤┌─ Escherichia coli APEC O1 (9)  
                                                                     └┤┌─ Escherichia coli ED1a (1)  
                                                                      └┤ ┌─ Escherichia coli (6-251/251) CFT073   
                                                                       └┬┴─ Escherichia coli 83972 (7)  
                                                                        └┬─ Escherichia coli 536 (7)  
                                                                         └┬─ Escherichia coli (6-250/250) F11   
                                                                          └┬─ Escherichia coli (6-251/251) APEC O1   
                                                                           └─ Escherichia coli (6-250/250) 042 (9)  
  

  
Hypothetical response regulatory protein ypdB
 (12)
  
Hypothetical response regulatory protein yehT
 (9)