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© IUBMB 2008
Alternative pathway to NAD+
5-phospho-α-D-ribose 1-diphosphate biosynthesis
EC 22.214.171.124 nicotinamide phosphoribosyltransferase
EC 126.96.36.199 NAD+ kinase
EC 188.8.131.52 nicotinamide-nucleotide adenylyltransferase