┌────────── Escherichia coli TA280   
┤   ┌───────────────────────────── Escherichia coli MS 69-1   
└───┤               ┌─ Escherichia coli ED1a (2)  
    │ ┌─────────────┴────────────── Escherichia coli NC101   
    └┬┴────────────── Escherichia coli (1-76/79) SE15 (3)  
     └┬─ Escherichia coli K12 (87)  
      └┬────────────── Escherichia coli M718   
       └─────────────┬─ fig|1040638.4.peg.4536 O104:H4 str. LB226692 (28)  
                     └─────────────┬─────────────────────────────────── Escherichia coli WV_060327   
                                   └─ Escherichia coli B171 (1)  
  

  
Cation transport regulator chaB
 (9)
  
 Others 
(1)