title: Analysis of an apparent case of "gene-controlled mutational stability": the auxotrophic preemption of a specific growth requirement.
mesh_terms: D001412:Bacillus subtilis; D003470:Culture Media; D005796:Genes; D006639:Histidine / Q000378:metabolism; D009154:Mutation; D012641:Selection, Genetic; D013912:Threonine / Q000378:metabolism
chemical_list: D003470:Culture Media; D013912:Threonine; D006639:Histidine