title: Study of microbial evolution through loss of biosynthetic functions: establishment of "defective" mutants.
mesh_terms: D001386:Azides / Q000494:pharmacology; D001412:Bacillus subtilis / Q000254:growth & development*; D005075:Biological Evolution; D003470:Culture Media; D005796:Genes; D006639:Histidine / Q000494:pharmacology; D007211:Indoles / Q000494:pharmacology; D009154:Mutation; D014364:Tryptophan / Q000494:pharmacology
chemical_list: D001386:Azides; D003470:Culture Media; D007211:Indoles; D006639:Histidine; D014364:Tryptophan