┌──────────────────── Escherichia coli 536 (4)  
┤                ┌────────────────── Escherichia coli IAI39 (1)  
└────────────────┤┌─ Escherichia coli K12 (112)  
                 └┤ ┌─────────────────── Escherichia coli O157:H7 str. EC869 (2)  
                  └┬┴─────────────────── Escherichia coli TA143   
                   └┬─────────────────── Escherichia coli M605   
                    └──────────────────┬─ Escherichia coli 101-1 (3)  
                                       └──────────┬─────────────────── Escherichia coli OP50   
                                                  └─────── Escherichia coli MS 187-1   
  

  
Uncharacterized protein YrbK clustered with lipopolysaccharide transporters
 (9)