Reaction catalyzed by purine-nucleoside phosphorylase (2.4.2.1)
+
=
+
+
2,6-diamino-8-azapurine
+
alpha-D-ribose 1-phosphate
=
N8-ribosyl-2,6-diamino-8-azapurine
+
N7-ribosyl-2,6-diamino-8-azapurine
+
phosphate
