title: Interrelation between tryptophan and nicotinic acid in human viral hepatitis.
mesh_terms: D006505:Hepatitis; D006506:Hepatitis A / Q000378:metabolism*; D009525:Niacin / Q000378:metabolism*; D009539:Nicotinic Acids; D014364:Tryptophan / Q000378:metabolism*; D014765:Viral Vaccines
chemical_list: D009539:Nicotinic Acids; D014765:Viral Vaccines; D009525:Niacin; D014364:Tryptophan
keywords: HEPATITIS, INFECTIONS/metabolism; NICOTINIC ACID/metabolism; TRYPTOPHAN/metabolism