Reaction catalyzed by nicotinamide phosphoribosyltransferase (2.4.2.12)
+
+
ATP
+
H2O
=
+
+
ADP
+
nicotinamide
+
alpha-D-5-phosphoribosyl 1-diphosphate
+
ATP
+
H2O
=
nicotinamide mononucleotide
+
diphosphate
+
ADP
+
phosphate
