┌─ Escherichia coli 83972 (9)  
                                    ┌──────────────┴─────────────── Escherichia coli O83:H1 str. NRG 857C   
                     ┌──────────────┴─ Escherichia coli 2362-75 (23)  
                    ┌┴─────────────── Escherichia coli O157:H7 str. EC508   
                   ┌┴─ Escherichia coli 1044A (24)  
    ┌──────────────┴─ Escherichia coli O157:H7 EDL933 (1)  
   ┌┴─ Escherichia coli K12 (32)  
┌──┴──────────────┬─────────────── Escherichia coli KO11 (2)  
┤                 └─ Escherichia coli B171 (15)  
└───────────┬─────────────────────────────── Escherichia coli B354   
            └┬─────────────── Escherichia coli H591   
             └┬─ Escherichia coli 042 (7)  
              └┬─────────────── Escherichia coli E24377A (1)  
               └─────────────── Escherichia coli FVEC1302 (3)  
  

  
Transcriptional repressor protein TyrR
 (11)
  
Transcriptional repressor protein TyrR # regulates the aroA I (aroF)-tyrA, aroA I (aroL and aroG) and aroP operons.
 (3)