┌─ Escherichia coli (10-665/665) BL21 (7)  
                                                                      ┌┴─ Escherichia coli (12-667/667) 2362-75   
                                                                     ┌┴─ Escherichia coli (12-667/667) E24377A (1)  
                                                                    ┌┴─ Escherichia coli (10-665/665) 042 (11)  
                                                                   ┌┴─ Escherichia coli (12-667/667) MS 175-1   
┌──────────────────────────────────────────────────────────────────┴─ Escherichia coli (7-667/667) MS 107-1 (1)  
│                                                                     ┌─ Escherichia coli 536 (4)  
┤                                                                    ┌┴─ Escherichia coli MS 21-1   
│                                                                   ┌┴─ Escherichia coli IAI39 (1)  
│                                                                  ┌┴┬─ Escherichia coli 2362-75 (9)  
└──────────────────────────────────────────────────────────────────┤ └─ Escherichia coli 83972 (11)  
                                                                   │┌─ Escherichia coli MS 145-7   
                                                                   └┤┌─ Escherichia coli MS 115-1   
                                                                    └┤┌─ Escherichia coli SMS-3-5   
                                                                     └┤ ┌─ Escherichia coli EC4100B   
                                                                      │┌┴─ Escherichia coli TA143   
                                                                      └┤ ┌─ Escherichia coli 1827-70   
                                                                       └┬┴─ fig|6666666.5357.peg.3724 TY-2482 strain   
                                                                        └┬─ Escherichia coli ETEC H10407   
                                                                         └┬─ Escherichia coli B7A (1)  
                                                                          └─ Escherichia coli K12 (76)  
  
High-affinity choline uptake protein BetT (14)
Secondary glycine betaine transporter BetU (6)
Others (1)