. . . . "NAD+ + H2O → nicotinamide mononucleotide + AMP + 2 H+"^^ . "NAD+ diphosphatase"^^ . "NADH pyrophosphatase"^^ . "NAD⁺ + H₂O → nicotinamide mononucleotide + AMP + 2 H⁺"^^ . "NADP pyrophosphatase"^^ . "3.6.1.22"^^ . . . . . . . . . . . "NAD+ + H2O → nicotinamide mononucleotide + AMP + 2 H+"^^ . . . .