obsolete 'de novo' NAD biosynthetic process (obsolete GO:0034627)
de novo NAD biosynthetic process
related
OBSOLETE. The chemical reactions and pathways resulting in the formation of nicotinamide adenine dinucleotide (NAD), beginning with the synthesis of tryptophan or aspartate from simpler precursors; biosynthesis may be of either the oxidized form, NAD+, or the reduced form, NADH.