title: Tryptophan metabolism in patients with pellagra: problem of vitamin B 6 enzyme activity and feedback control of tryptophan pyrrolase enzyme.
mesh_terms: D001741:Black or African American; D044383:Black People; D005246:Feedback / Q000187:drug effects; D005260:Female; D006801:Humans; D007737:Kynurenine / Q000494:pharmacology / Q000652:urine; D008297:Male; D009536:Niacinamide / Q000652:urine; D009539:Nicotinic Acids / Q000494:pharmacology*; D010383:Pellagra / Q000201:enzymology / Q000378:metabolism*; D011725:Pyridines / Q000652:urine; D011728:Pyridones / Q000652:urine; D011736:Pyridoxine / Q000494:pharmacology*; D013019:South Africa; D014364:Tryptophan / Q000378:metabolism* / Q000494:pharmacology; D014366:Tryptophan Oxygenase / Q000378:metabolism*; D014481:United States; D044465:White People; D014977:Xanthurenates / Q000652:urine
chemical_list: D009539:Nicotinic Acids; D011725:Pyridines; D011728:Pyridones; D014977:Xanthurenates; D009536:Niacinamide; D007737:Kynurenine; D014364:Tryptophan; D014366:Tryptophan Oxygenase; D011736:Pyridoxine