┌─ Escherichia coli K12 (130)  
                                                                 ┌┴─── Escherichia coli (1-374/477) O157:H7 str. TW14588   
┬────────────────────────────────────────────────────────────────┴─ Escherichia coli M605   
└────────────────────────────────────────────────────────────────┬─ Escherichia coli (1-382/383) APEC O1  [2] 
                                                                 └┬─ Escherichia coli (1-364/365) 101-1 (3)  
                                                                  └─ Escherichia coli (1-382/383) CFT073 (2)  
  

  
S-adenosylmethionine synthetase (EC 2.5.1.6)
 (6)