┌─ Escherichia coli (113-243/273) K12 (127)  
                                                         ┌┴─ Escherichia coli (113-241/241) OP50   
┌────────────────────────────────────────────────────────┴─ Escherichia coli (113-243/273) B185 (3)  
┤                                                     ┌────────────── Escherichia coli B171 (2)  
└─────────────────────────────────────────────────────┤    ┌─ Escherichia coli MS 182-1 (2)  
                                                      │   ┌┴─ Escherichia coli M718   
                                                      └───┤┌─ Escherichia coli O83:H1 str. NRG 857C   
                                                          ││  ┌─ Escherichia coli 536 (14)  
                                                          └┤ ┌┴─ Escherichia coli CFT073 (2)  
                                                           │┌┴┬─ Escherichia coli B354   
                                                           ││ └─ Escherichia coli 042 (1)  
                                                           └┤┌─ Escherichia coli 83972 (2)  
                                                            ││  ┌─ Escherichia coli 2362-75 (1)  
                                                            └┤ ┌┴─ Escherichia coli E22 (2)  
                                                             │┌┴─ Escherichia coli K12 (76)  
                                                             └┤ ┌─ Escherichia coli B7A (3)  
                                                              └┬┴─ Escherichia coli 1827-70   
                                                               └┬─ Escherichia coli WV_060327   
                                                                └─ Escherichia coli O26:H11 str. 11368   
  

  
Colanic acid biosynthesis acetyltransferase WcaB (EC 2.3.1.-)
 (16)
  
Serine acetyltransferase (EC 2.3.1.30)
 (3)