Efficiency of tryptophan as a niacin precursor in the young chick.
D000596:Amino Acids / Q000378:metabolism; D000818:Animals; D002645:Chickens / Q000378:metabolism*; D004032:Diet; D005260:Female; D008297:Male; D009539:Nicotinic Acids / Q000378:metabolism*; D009751:Nutritional Requirements; D014364:Tryptophan / Q000378:metabolism*
D000596:Amino Acids; D009539:Nicotinic Acids; D014364:Tryptophan