┌─ Escherichia coli (2-280/280) K12 (14)  
┌─────────────────┴─────────────────────────── Escherichia coli B str. REL606 (3)  
┤          ┌─ Escherichia coli (2-280/280) 042 (71)  
│         ┌┴─────────────────────────── Escherichia coli IAI39 (3)  
└────────┬┴─────────────────────────── Escherichia coli (2-280/280) E22 (1)  
         └┬─────────────────────────── Escherichia coli (2-280/280) E24377A (1)  
          └──────────────────────────┬─────────────────────────── Escherichia coli NC101   
                                     └┬─────────────────────────── Escherichia coli M718   
                                      └┬─────────────────────────── Escherichia coli (2-280/280) E2348/69 (1)  
                                       └┬─────────────────────────── Escherichia coli (2-280/280) APEC O1 (6)  
                                        └─ Escherichia coli (2-280/280) CFT073 (18)  
  

  
Chitobiose-specific regulator ChbR, AraC family
 (11)