┌─ Escherichia coli (59-741/771) B354   
┌─────────────────────────────────────────────────────────────────┴─ Escherichia coli (59-741/771) MS 145-7   
┤                                                                ┌─ Escherichia coli 101-1   
└────────────────────────────────────────────────────────────────┤┌─ Escherichia coli 53638 (13)  
                                                                 ││┌─ Escherichia coli MS 175-1   
                                                                 └┤│ ┌─ Escherichia coli K12 (7)  
                                                                  ││┌┴─ Escherichia coli MS 187-1   
                                                                  └┤│┌─ Escherichia coli B185   
                                                                   │││        ┌─ fig|1040638.4.peg.3084 O104:H4 str. LB226692 (4)  
                                                                   │││       ┌┴─ Escherichia coli IAI1 (2)  
                                                                   └┤│      ┌┴─ Escherichia coli B088 (2)  
                                                                    ││     ┌┴─ Escherichia coli EC4100B   
                                                                    ││    ┌┴┬─ Escherichia coli B7A (2)  
                                                                    ││    │ └┬─ Escherichia coli O26:H11 str. 11368   
                                                                    └┤   ┌┤  └─ Escherichia coli O111:H- str. 11128   
                                                                     │   │└┬─ Escherichia coli E22 (4)  
                                                                     │  ┌┤ └┬─ Escherichia coli E24377A (1)  
                                                                     │  ││  └─ Escherichia coli B171 (1)  
                                                                     │ ┌┤└─ Escherichia coli TA271   
                                                                     │┌┤└─ Escherichia coli KO11 (2)  
                                                                     ││└┬─ Escherichia coli MS 115-1   
                                                                     ││ └─ Escherichia coli MS 124-1 (1)  
                                                                     └┤ ┌─ Escherichia coli 1044A (22)  
                                                                      │┌┴─ Escherichia coli O157:H7 str. FRIK2000 (1)  
                                                                      ││┌─ Escherichia coli M718   
                                                                      └┤│ ┌─ Escherichia coli TA143   
                                                                       ││┌┴─ Escherichia coli TA280   
                                                                       └┤│     ┌─ Escherichia coli FVEC1302 (3)  
                                                                        ││    ┌┴─ Escherichia coli 042 (1)  
                                                                        ││   ┌┴─ Escherichia coli MS 69-1   
                                                                        └┤  ┌┴─ Escherichia coli B354   
                                                                         │ ┌┴─ Escherichia coli H299   
                                                                         │┌┴─ Escherichia coli 83972 (5)  
                                                                         ││  ┌─ Escherichia coli 2362-75 (9)  
                                                                         └┤ ┌┴─ Escherichia coli O83:H1 str. NRG 857C   
                                                                          │┌┴─ Escherichia coli NC101   
                                                                          └┤ ┌─ Escherichia coli SMS-3-5   
                                                                           │┌┴─ Escherichia coli MS 21-1   
                                                                           └┤ ┌─ Escherichia coli IAI39 (1)  
                                                                            └┬┴─ Escherichia coli TA206   
                                                                             └┬─ Escherichia coli M605   
                                                                              └┬─ Escherichia coli SE15   
                                                                               └┬─ Escherichia coli ED1a (1)  
                                                                                └┬─ Escherichia coli 536 (1)  
                                                                                 └─ Escherichia coli F11 (2)  
  
Ribonucleotide reductase of class Ib (aerobic), alpha subunit (EC 1.17.4.1) (42)
Ribonucleotide reductase of class Ia (aerobic), alpha subunit (EC 1.17.4.1) (2)
Others (1)