┬─────────────────────────────────────────────────────── Escherichia coli (175-210/212) 1044A (7)  
└───────────────────────┬─ Escherichia coli (20-55/57) B7A (5)  
                        └─────────────┬─ Escherichia coli (73-108/110) O26:H11 str. 11368   
                                      └───┬─ Escherichia coli (73-108/110) MS 21-1   
                                          └───────────────────────── Escherichia coli (73-110/110) MS 84-1 (15)  
  

  
Nickel ABC transporter, periplasmic nickel-binding protein NikA (TC 3.A.1.5.3)
 (3)
  
NikA protein
 (1)
  
hypothetical protein
 (1)