┌─ Escherichia coli (19-442/443) K12 (53)  
                                                                      ┌┴─ Escherichia coli (19-442/443) OP50   
                                                                     ┌┴─ fig|1040638.4.peg.1693 O104:H4 (19-442/443) str. LB226692 (52)  
                                                                    ┌┴─ Escherichia coli (19-442/443) O111:H- str. 11128   
                                                                   ┌┴─ Escherichia coli (19-442/443) 042 (18)  
┌──────────────────────────────────────────────────────────────────┴─ Escherichia coli (19-442/443) S88   
│                                                                        ┌─ Escherichia coli (11-422/425) K12 (57)  
│                                                                       ┌┴─ Escherichia coli (29-440/443) H299   
│                                                                      ┌┴─ Escherichia coli (29-440/443) ATCC 8739 (1)  
│                                                                     ┌┴─ Escherichia coli (29-440/443) E24377A (1)  
│                                                                    ┌┴─ Escherichia coli (29-440/443) HS (1)  
│                                                                   ┌┴┬─ Escherichia coli (29-440/443) O55:H7 str. CB9615   
┤                                                                  ┌┤ └─ Escherichia coli (29-440/443) 1044A (24)  
│                                                                 ┌┤└─ Escherichia coli (29-440/443) 2362-75 (6)  
│                                                                 │└┬─ Escherichia coli (29-440/443) MS 21-1   
│                                  ┌──────────────────────────────┤ └┬─ Escherichia coli (29-440/443) TA280   
│                                  │                              │  └─ Escherichia coli (29-440/443) 042 (24)  
│                                  │                              └─ Escherichia coli (29-440/443) TA143   
│                                  │                                   ┌─ Escherichia coli (22-444/444) CFT073 (10)  
│                                  │                                  ┌┴─ Escherichia coli NC101   
└──────────────────────────────────┤                                 ┌┴─ Escherichia coli ED1a (1)  
                                   │                                ┌┴┬─ Escherichia coli O83:H1 str. NRG 857C   
                                   │                               ┌┤ └─ Escherichia coli (22-444/444) APEC O1 (6)  
                                   │                               │└┬─ Escherichia coli (22-444/444) E2348/69 (2)  
                                   │                              ┌┤ └┬─ Escherichia coli M605 (1)  
                                   │                              ││  └─ Escherichia coli SE15   
                                   └──────────────────────────────┤└─ Escherichia coli TA206   
                                                                  │┌─ Escherichia coli IAI39 (1)  
                                                                  └┤┌─ fig|1040638.4.peg.2182 O104:H4 str. LB226692 (7)  
                                                                   ││  ┌─ Escherichia coli B354   
                                                                   └┤ ┌┴─ Escherichia coli H299   
                                                                    │┌┴─ Escherichia coli TA280   
                                                                    ││    ┌─ Escherichia coli 1125A   
                                                                    └┤   ┌┴─ Escherichia coli 1044A (21)  
                                                                     │  ┌┴─ Escherichia coli O157:H7 EDL933 (1)  
                                                                     │ ┌┴─ Escherichia coli (22-444/444) 042 (2)  
                                                                     └┬┴─ Escherichia coli MS 69-1   
                                                                      └┬─ Escherichia coli B185   
                                                                       └┬─ Escherichia coli M718 (1)  
                                                                        └┬─ Escherichia coli FVEC1412   
                                                                         └┬─ Escherichia coli FVEC1302 (2)  
                                                                          └┬─ Escherichia coli B171 (26)  
                                                                           └┬─ Escherichia coli 53638   
                                                                            └─ Escherichia coli K12 (21)  
  
Serine transporter (37)
L-threonine transporter, anaerobically inducible (5)
Others (2)