Synthesis of nicotinic acid from tryptophan by the developing chick embryo.
D000818:Animals; D002642:Chick Embryo; D047108:Embryonic Development; D009525:Niacin; D009539:Nicotinic Acids; D014364:Tryptophan
D009539:Nicotinic Acids; D009525:Niacin; D014364:Tryptophan