┌─ Escherichia coli MS 115-1   
                                                                      ┌┴─ Escherichia coli 2362-75   
                                                                     ┌┴─ Escherichia coli M718   
                                                                    ┌┴┬─ Escherichia coli K12 (102)  
                                                                   ┌┤ └─ Escherichia coli O157:H7 EDL933   
                                                                   │└┬─ Escherichia coli 536 (1)  
                                                                  ┌┤ └─ Escherichia coli MS 78-1   
                                                                  │└┬─ Escherichia coli ETEC H10407   
                                                                  │ └┬─ Escherichia coli O55:H7 str. CB9615   
                                                                  │  └┬─ Escherichia coli MS 124-1 (1)  
┌─────────────────────────────────────────────────────────────────┤   └┬─ Escherichia coli CFT073 (1)  
│                                                                 │    └┬─ Escherichia coli MS 200-1   
│                                                                 │     └─ Escherichia coli 83972 (11)  
┤                                                                 └─ Escherichia coli 1827-70 (2)  
│                                                                   ┌─ Escherichia coli (17-596/597) APEC O1 (9)  
│                                                                  ┌┴─ Escherichia coli (17-596/597) NC101 (1)  
│                                                                 ┌┴─ Escherichia coli (17-596/597) M605 (1)  
└─────────────────────────────────────────────────────────────────┤ ┌─ Escherichia coli (17-596/597) 83972 (5)  
                                                                  │┌┴─ Escherichia coli (17-596/597) 536 (5)  
                                                                  └┤ ┌─ Escherichia coli (17-596/597) B171 (4)  
                                                                   │┌┴─ Escherichia coli (17-596/597) H591   
                                                                   └┤┌─ Escherichia coli (17-596/597) 2362-75 (4)  
                                                                    └┤ ┌─ Escherichia coli (17-596/597) K12 (53)  
                                                                     └┬┴─ Escherichia coli (17-596/597) E110019 (1)  
                                                                      └┬─ Escherichia coli (17-596/597) MS 124-1 (1)  
                                                                       └┬─ Escherichia coli (17-596/597) 042 (5)  
                                                                        └┬─ Escherichia coli (17-596/597) MS 69-1   
                                                                         └┬─ Escherichia coli (17-596/597) O157:H7 str. EC4206   
                                                                          └┬─ Escherichia coli (17-596/597) 1044A (26)  
                                                                           └─ Escherichia coli (17-596/597) B185   
  
Uptake hydrogenase large subunit (EC 1.12.99.6) (29)
Hydrogenase-2 large chain precursor( EC:1.18.99.1 ) (1)