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. 2011 Aug 3;6(8):e22781. doi: 10.1371/journal.pone.0022781

Figure 1. Metabolic pathways of the salvage NAD synthesis.

Figure 1

NaAD, NA adenine dinucleotide; NMNAT, NMN adenylyltransferase; NaMNAT, NaMN adenylyltransferase; NADsyn, NAD synthetase. Broken arrows indicate the possible extracellular pathway in NAD biosynthesis [14].