┬── Escherichia coli (42-219/219) 53638 (1)  
└┬─ Escherichia coli (42-219/219) K12 (128)  
 └─────────────────────────────────────────────────────────────────── Escherichia coli (42-219/219) 536 (1)  
  

  
Ribose 5-phosphate isomerase A (EC 5.3.1.6)
 (3)