┌──────────────── Escherichia coli MS 115-1   
                                      ┌┴──────────────── Escherichia coli 1827-70   
                                     ┌┴─ Escherichia coli K12 (68)  
                                    ┌┴┬──────────────── Escherichia coli (10-391/391) 042 (8)  
                                    │ └───────────────┬──────────────── Escherichia coli (10-391/391) ATCC 8739   
                    ┌───────────────┤                 └─ Escherichia coli ETEC H10407 (2)  
                    │               └──────────────┬─ Escherichia coli MS 69-1   
    ┌───────────────┤                              └┬──────────────── Escherichia coli FVEC1302 (2)  
    │               │                               └──────────────── Escherichia coli TA280   
┌───┤               └─ Escherichia coli H299   
┤   └─ Escherichia coli 2362-75   
│           ┌──────────────── Escherichia coli MS 196-1   
└───────────┤┌─ Escherichia coli M718 (1)  
            └┤                ┌──────────────── Escherichia coli (10-391/391) E2348/69   
             └┬───────────────┴─ Escherichia coli (10-391/391) MS 175-1   
              └───────────────┬─ Escherichia coli 536 (5)  
                              └┬──────────────── Escherichia coli 83972 (16)  
                               └───────────────┬─ Escherichia coli (10-391/391) F11   
                                               └──────────────── Escherichia coli (10-391/391) APEC O1 (1)  
  

  
Carbamoyl-phosphate synthase small chain (EC 6.3.5.5)
 (19)