┌─ Escherichia coli K12 (60)  
                                       ┌┴─ fig|6666666.5357.peg.3492 TY-2482 strain (9)  
┌──────────────────────────────────────┴────────────────────────── Escherichia coli B354   
┤                                       ┌─ Escherichia coli 1044A (27)  
└─────────────┬─────────────────────────┴─ Escherichia coli M718   
              └┬─ Escherichia coli IAI39 (3)  
               └─────────────────────────┬─ Escherichia coli NC101   
                                         └┬────────────────────────── Escherichia coli M605 (1)  
                                          └─ Escherichia coli 2362-75 (25)  
  

  
Phosphohistidine phosphatase SixA
 (8)
  
 Others 
(1)