┌─ Escherichia coli (19-263/281) O83:H1 str. NRG 857C (1)  
                                           ┌┴─ Escherichia coli (19-263/281) M718   
                                          ┌┴─ Escherichia coli (19-268/281) MS 21-1   
                                         ┌┴┬─ Escherichia coli (33-277/295) O157:H7 str. EC4486 (24)  
                                        ┌┤ └─ Escherichia coli (19-263/281) MS 107-1   
                                       ┌┤└─ Escherichia coli (19-263/281) EC4100B   
                                       │└─ Escherichia coli (19-263/281) K12 (72)  
                                      ┌┤ ┌─ Escherichia coli (33-277/295) E2348/69 (19)  
                                      │└┬┴─ Escherichia coli (19-263/281) TA143   
         ┌────────────────────────────┤ └┬─ Escherichia coli (19-263/281) FVEC1302 (3)  
         │                            │  └─ Escherichia coli (19-263/281) B str. REL606 (2)  
┌────────┤                            └─ Escherichia coli (19-263/281) WV_060327   
┤        └─────────────────────────────────────────────────────────── Escherichia coli (22-260/272) MS 146-1   
│                                      ┌─ Escherichia coli M605   
└──────────────────────────────────────┤┌─ Escherichia coli H299   
                                       ││┌─ Escherichia coli 83972 (3)  
                                       └┤│   ┌─ Escherichia coli WV_060327   
                                        ││  ┌┴─ Escherichia coli TA206   
                                        └┤ ┌┴┬─ Escherichia coli ED1a (3)  
                                         │┌┤ └─ Escherichia coli APEC O1 (7)  
                                         ││└┬─ Escherichia coli SMS-3-5   
                                         └┤ └─ Escherichia coli 042 (5)  
                                          │  ┌─ Escherichia coli E24377A (7)  
                                          │ ┌┴─ Escherichia coli ATCC 8739 (1)  
                                          └┬┴─ Escherichia coli K12 (36)  
                                           └┬─ Escherichia coli TA280   
                                            └┬─ Escherichia coli M718   
                                             └┬─ Escherichia coli O157:H7 EDL933   
                                              └┬─ Escherichia coli 1125A (12)  
                                               └┬─ fig|1040638.4.peg.4185 O104:H4 str. LB226692 (28)  
                                                └┬─ Escherichia coli (1-253/272) O55:H7 str. CB9615   
                                                 └┬─ Escherichia coli E22 (1)  
                                                  └┬─ Escherichia coli O103:H2 str. 12009   
                                                   └─ Escherichia coli MS 124-1 (1)  
  
Spermidine Putrescine ABC transporter permease component potC (TC_3.A.1.11.1) (20)
Putrescine transport system permease protein PotI (TC 3.A.1.11.2) (12)
ABC-type transporter, permease component: POPT family (1)
Others (1)