┌─────────────────────────────── Escherichia coli (5-277/287) H299 (2)  
│                                                                    ┌─ Escherichia coli (10-279/281) 2362-75 (16)  
┤                                                                   ┌┴─ Escherichia coli (10-279/281) S88   
│                                                                  ┌┴┬─ Escherichia coli (10-279/281) 83972 (1)  
│   ┌──────────────────────────────────────────────────────────────┤ └─ Escherichia coli (10-279/281) CFT073 (6)  
└───┤                                                              └─ Escherichia coli (10-279/281) M605 (2)  
    └─────────────────┬─ Escherichia coli H299   
                      └┬─ Escherichia coli B088 (1)  
                       └┬─ Escherichia coli 2362-75 (28)  
                        └┬─ Escherichia coli 042 (51)  
                         └┬─ Escherichia coli MS 84-1   
                          └┬─ Escherichia coli E24377A (1)  
                           └┬─ fig|6666666.5357.peg.1969 TY-2482 strain   
                            └─ Escherichia coli K12 (38)  
  

  
Phosphogluconate repressor HexR, RpiR family
 (7)
  
Sialic acid utilization regulator, RpiR family
 (4)
  
Transcriptional regulator, RpiR family
 (2)
  
 Others 
(1)