┌─ Escherichia coli MS 115-1   
                 ┌────┴─────── Escherichia coli 101-1   
                ┌┴─ Escherichia coli K12 (27)  
               ┌┴─ Escherichia coli (5-112/112) OP50   
   ┌───────────┴────── Escherichia coli (5-118/118) MS 187-1   
┌──┴────── Escherichia coli MS 21-1   
│  ┌──────────── Escherichia coli B185   
┤  │        ┌────── fig|1040638.4.peg.1697 O104:H4 str. LB226692 (18)  
│  │  ┌─────┴─ Escherichia coli (5-118/118) B088 (10)  
└──┤ ┌┴────────────────── Escherichia coli TA280   
   │┌┴─ Escherichia coli (5-118/118) O157:H7 str. EC4486 (26)  
   ││                                                     ┌─ Escherichia coli (5-118/118) SMS-3-5   
   ││                                   ┌─────────────────┴──────────── Escherichia coli B354   
   └┤                  ┌────────────────┴─ Escherichia coli (5-118/118) FVEC1302 (4)  
    │      ┌───────────┴─ Escherichia coli (5-118/118) 042 (2)  
    │┌─────┴─────┬────── Escherichia coli WV_060327   
    ││           └─ Escherichia coli H299   
    └┤                 ┌─ Escherichia coli TA206   
     │           ┌─────┴────────────────── Escherichia coli O83:H1 str. NRG 857C   
     │     ┌─────┴──────────── Escherichia coli (5-118/118) E2348/69 (2)  
     └─────┤       ┌────── Escherichia coli 536 (4)  
           │      ┌┴──────────── Escherichia coli NC101   
           └─────┬┴─ Escherichia coli ED1a (1)  
                 └─────┬────── Escherichia coli (5-118/118) CFT073 (1)  
                       └┬─ Escherichia coli 83972 (3)  
                        └─────┬────── Escherichia coli UM146   
                              └─ Escherichia coli APEC O1 (3)  
  

  
Threonine catabolic operon transcriptional activator TdcR
 (26)
  
 Others 
(1)