┌─────────────────────────────── Escherichia coli (1-106/108) B354   
┤                   ┌─ Escherichia coli K12 (88)  
└──────────────────┬┴─ Escherichia coli (1-106/108) FVEC1302 (10)  
                   └───────────────────────────────────────────────┬─ Escherichia coli (1-106/108) MS 69-1 (1)  
                                                                   └─ Escherichia coli 2362-75 (26)  
  

  
Transcriptional repressor protein TrpR
 (4)
  
Transcriptional repressor protein TrpR # regulates the trp, aroA I (aroH, aroL) and the mtr operons and auto-regulates TrpR.
 (1)