Role of tryptophan in the biosynthesis of nicotinamide.
D009525:Niacin; D009536:Niacinamide; D009539:Nicotinic Acids; D014364:Tryptophan
D009539:Nicotinic Acids; D009536:Niacinamide; D009525:Niacin; D014364:Tryptophan
NICOTINIC ACID; TRYPTOPHAN