GO:0009435

NAD biosynthetic process

Details: 
The chemical reactions and pathways resulting in the formation of nicotinamide adenine dinucleotide, a coenzyme present in most living cells and derived from the B vitamin nicotinic acid; biosynthesis may be of either the oxidized form, NAD, or the reduced form, NADH. [GOC:jl, ISBN:0618254153]
Evidence Code: