NAD(+) biosynthesis Biosynthesis of NAD+ (nicotinamide adenine dinucleotide), a coenzyme found in all living cells. NAD+ is a dinucleotide, since it consists of two nucleotides joined through their phosphate groups: with one nucleotide containing an adenosine ring, and the other containing nicotinamide. KEGG:map00910 KEGG:map00760 UPa:UPA00253 pathway nicotinamide adenine dinucleotide biosynthesis PMID:14592712 PMID:16698895 PMID:12496312 KEGG:map01100 GO:0009435 KEGG:map00380 cofactor biosynthesis