Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Biosynthesis of NAD and NADP. NAD is synthesized de novo from the tryptophan metabolite quinolinic acid or from the preformed precursors nicotinic acid, nicotinic acid riboside, nicotinamide, or nicotinamide riboside. The nicotinamide functional group permits the reversible electron transfer reactions that allow these pyridine dinucleotides to function as electron carriers in a variety of metabolic pathways (inset).
