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© IUBMB 2008
Alternative pathway to NAD+
5-phospho-α-D-ribose 1-diphosphate biosynthesis
EC 184.108.40.206 nicotinamide phosphoribosyltransferase
EC 220.127.116.11 NAD+ kinase
EC 18.104.22.168 nicotinamide-nucleotide adenylyltransferase