Figure 1.
NAD+ and NADP+ biosynthetic pathways in prokaryotes. (A) De novo and salvage pathways for NAD+ biosynthesis. (B) NADP+ biosynthesis by NAD kinase. Abbreviations: NaMN, nicotinic acid mononucleotide; NaAD, nicotinic acid adenine dinucleotide; NR, nicotinamide riboside; NMN, nicotinamide mononucleotide; NAD, nicotinamide adenine dinucleotide; NADP, nicotinamide adenine dinucleotide phosphate; NADK, NAD kinase.