┌─────────────── Escherichia coli 101-1 (4)  
                  ┌┴──────────────── Escherichia coli O111:H- str. 11128   
  ┌───────────────┴─ Escherichia coli O26:H11 str. 11368   
 ┌┴─────────────── Escherichia coli H299   
┌┴┬─ Escherichia coli MS 21-1   
│ └┬─────────────── Escherichia coli SMS-3-5   
┤  └──────────────┬─────────────── Escherichia coli O55:H7 str. CB9615   
│                 └─────────────── Escherichia coli 1044A (23)  
│┌─────────────── Escherichia coli MS 124-1 (1)  
└┤               ┌──────────────── Escherichia coli 042 (6)  
 │              ┌┴─────────────── Escherichia coli ATCC 8739 (1)  
 └──────────────┤┌─────────────── Escherichia coli 2362-75 (1)  
                ││ ┌─────────────── Escherichia coli UTI89 (1)  
                └┤┌┴─ fig|1040638.4.peg.5083 O104:H4 str. LB226692 (32)  
                 ││                 ┌─ Escherichia coli K12 (12)  
                 ││  ┌──────────────┴─────────────── Escherichia coli ETEC H10407   
                 └┤ ┌┴─────────────── Escherichia coli 53638 (1)  
                  │┌┴┬─────────────── Escherichia coli B185   
                  ││ └──────────────┬─────────────── Escherichia coli MS 200-1   
                  └┤                └─ Escherichia coli 536 (3)  
                   │┌─────────────── Escherichia coli TA280   
                   └┤ ┌──────────────── Escherichia coli APEC O1 (1)  
                    └┬┴─────────────── Escherichia coli NC101   
                     └┬────────────────────────────────────────────── Escherichia coli SE15   
                      └──────────────┬─ Escherichia coli B171 (17)  
                                     └─────────────── Escherichia coli O103:H2 str. 12009   
  

  
Phosphate regulon sensor protein PhoR (SphS) (EC 2.7.13.3)
 (25)
  
 Others 
(1)