Also acts on benzimidazole, and the clostridial enzyme acts on adenine to form 7-alpha-D-ribosyladenine 5'-phosphate. The product of the reaction, alpha-ribazole 5'-phosphate, forms part of the corrin-biosynthesis pathway and is a substrate for EC
2.7.8.26, adenosylcobinamide-GDP ribazoletransferase [4]. It can also be dephosphorylated to form alpha-ribazole by the action of EC
3.1.3.73, alpha-ribazole phosphatase.