. . . . "5-phospho-α-D-ribose 1-diphosphate + nicotinamide + H+ → diphosphate + nicotinamide mononucleotide"^^ . "NMN pyrophosphorylase"^^ . "NMN diphosphorylase"^^ . "5-phospho-α-D-ribose 1-diphosphate + nicotinamide + H⁺ → diphosphate + nicotinamide mononucleotide"^^ . "2.4.2.12"^^ . . . . . . . . . . . "5-phospho-α-D-ribose 1-diphosphate + nicotinamide + H+ → diphosphate + nicotinamide mononucleotide"^^ .