┌─ Escherichia coli B354   
                                                                        ┌┴─ Escherichia coli TA143   
                                                                       ┌┴─ Escherichia coli MS 69-1   
                                                                      ┌┴┬─ Escherichia coli FVEC1302 (3)  
                                                                      │ └┬─ Escherichia coli 1044A (25)  
                                                                     ┌┤  └─ Escherichia coli 53638 (3)  
                                                                     │└┬─ Escherichia coli TA280   
                                                                    ┌┤ └─ Escherichia coli K12 (37)  
                                                                    │└┬─ Escherichia coli 101-1   
                                                                   ┌┤ └┬─ Escherichia coli B171 (15)  
                                                                   ││  └─ fig|1040638.4.peg.5600 O104:H4 str. LB226692 (3)  
                                                                  ┌┤└─ Escherichia coli E24377A (1)  
                                                                  │└┬─ Escherichia coli MS 21-1   
                                                                 ┌┤ └┬─ Escherichia coli IAI39 (1)  
                                                                 ││  └─ Escherichia coli SMS-3-5   
                                                                ┌┤└─ Escherichia coli 536 (4)  
                                                               ┌┤└─ Escherichia coli SE15   
                                                               │└─ Escherichia coli M605   
┌──────────────────────────────────────────────────────────────┤┌─ Escherichia coli APEC O1 (6)  
│                                                              └┤ ┌─ Escherichia coli ED1a (2)  
│                                                               └┬┴─ Escherichia coli TA206   
│                                                                └┬─ Escherichia coli O83:H1 str. NRG 857C   
│                                                                 └┬─ Escherichia coli 83972 (1)  
┤                                                                  └─ Escherichia coli 2362-75 (5)  
│                                                                 ┌─ Escherichia coli EC4100B (3)  
│                                                                ┌┴─ Escherichia coli K12 (10)  
│                                                               ┌┴─ Escherichia coli 1827-70 (1)  
│                                                              ┌┴─ Escherichia coli H299   
└──────────────────────────────────────────────────────────────┤┌─ Escherichia coli KO11 (2)  
                                                               └┤┌─ Escherichia coli B171 (7)  
                                                                └┤┌─ Escherichia coli MS 84-1   
                                                                 └┤ ┌─ Escherichia coli MS 107-1   
                                                                  │┌┴─ Escherichia coli E110019 (4)  
                                                                  └┤┌─ fig|1040638.4.peg.3758 O104:H4 str. LB226692 (12)  
                                                                   ││   ┌─ Escherichia coli B185   
                                                                   └┤  ┌┴─ Escherichia coli O55:H7 str. CB9615   
                                                                    │ ┌┴─ Escherichia coli 1044A (23)  
                                                                    │┌┴─ Escherichia coli ATCC 8739   
                                                                    └┤ ┌─ Escherichia coli B354 (1)  
                                                                     │┌┴─ Escherichia coli 042 (6)  
                                                                     └┤┌─ Escherichia coli MS 21-1   
                                                                      └┤┌─ Escherichia coli IAI39 (1)  
                                                                       └┤┌─ Escherichia coli WV_060327   
                                                                        └┤┌─ Escherichia coli 536 (4)  
                                                                         └┤ ┌─ Escherichia coli SMS-3-5   
                                                                          │┌┴─ Escherichia coli 2362-75 (1)  
                                                                          └┤┌─ Escherichia coli NC101 (2)  
                                                                           └┤┌─ Escherichia coli ED1a   
                                                                            └┤ ┌─ Escherichia coli 83972 (5)  
                                                                             └┬┴─ Escherichia coli APEC O1 (6)  
                                                                              └┬─ Escherichia coli SE15   
                                                                               └─ Escherichia coli M605   
  

  
Electron transfer flavoprotein, alpha subunit
 (27)
  
Electron transfer flavoprotein, alpha subunit FixB
 (23)
  
 Others 
(2)