┌─────────────── Escherichia coli (14-223/436) 1827-70   
┌──────┴─ Escherichia coli (1-201/414) O127:H6 str. E2348/69 (1)  
┤                                    ┌─ Escherichia coli (1-211/424) EC4100B   
└───────┬────────────────────────────┴───────────────────────────── Escherichia coli (1-211/424) MS 115-1   
        └┬─ fig|1040638.4.peg.2939 O104:H4 str. LB226692   
         └┬─ Escherichia coli (1-211/424) K12 (123)  
          └┬────────────────────────────────────────────────────────── Escherichia coli (1-211/424) B088 (2)  
           └───────────────────────────── Escherichia coli (1-211/424) M718   
  

  
Histidyl-tRNA synthetase (EC 6.1.1.21)
 (7)
  
 Others 
(1)