title: Tryptophan requirement of growing chicks as affected by dietary protein level.
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002645:Chickens / Q000254:growth & development*; D004044:Dietary Proteins / Q000032:analysis; D005503:Food Additives; D009751:Nutritional Requirements; D014364:Tryptophan / Q000008:administration & dosage* / Q000032:analysis
chemical_list: D004044:Dietary Proteins; D005503:Food Additives; D014364:Tryptophan