title: Genetic investigation of tryptophan-requiring mutants of Aspergillus nidulans.
mesh_terms: D001230:Aspergillus; D005827:Genetics, Microbial; D009154:Mutation; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D014364:Tryptophan / Q000096:biosynthesis
chemical_list: D014364:Tryptophan