┌─────────────────────────────────────────────────────────────────── Escherichia coli (5-226/240) B str. REL606 (1)  
┤                                                                 ┌─ Escherichia coli MS 115-1   
│                                                                 │  ┌─ Escherichia coli K12 (47)  
└─────────────────────────────────────────────────────────────────┤ ┌┴─ Escherichia coli ETEC H10407   
                                                                  │┌┴─ Escherichia coli H591 (2)  
                                                                  └┤┌─ Escherichia coli 101-1 (5)  
                                                                   ││   ┌─ Escherichia coli O55:H7 str. CB9615   
                                                                   └┤  ┌┴─ Escherichia coli 1044A (23)  
                                                                    │ ┌┴─ Escherichia coli 53638 (1)  
                                                                    │┌┴┬─ Escherichia coli SMS-3-5   
                                                                    └┤ └─ Escherichia coli M718   
                                                                     │┌─ Escherichia coli 042 (6)  
                                                                     └┤  ┌─ Escherichia coli 536 (23)  
                                                                      │ ┌┴─ Escherichia coli WV_060327   
                                                                      └┬┴─ Escherichia coli TA206   
                                                                       └┬─ Escherichia coli B354 (2)  
                                                                        └┬─ Escherichia coli IAI39 (2)  
                                                                         └┬─ Escherichia coli H299   
                                                                          └─ Escherichia coli 2362-75 (1)  
  

  
2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase (EC 2.7.7.60)
 (19)