┬──────────────────────────────────────────────────────────────── Escherichia coli (1-122/126) APEC O1 (4)  
└───────────────────────────────────────────────────────────────┬─ Escherichia coli ED1a (1)  
                                                                └┬─ fig|1040638.4.peg.5320 O104:H4 str. LB226692 (96)  
                                                                 └┬─ Escherichia coli FVEC1302 (3)  
                                                                  └┬─ Escherichia coli IAI39 (1)  
                                                                   └┬─ Escherichia coli ATCC 8739 (3)  
                                                                    └┬─ Escherichia coli H736   
                                                                     └─ Escherichia coli K12 (13)  
  

  
Protein crcB
 (6)
  
CrcB protein
 (1)
  
 Others 
(1)