title: Gene-controlled change in mutational stability of a tryptophaneless mutant of E. coli WP2.
mesh_terms: D000225:Adenine / Q000378:metabolism; D004926:Escherichia coli; D005796:Genes / Q000502:physiology*; D009154:Mutation / Q000528:radiation effects; D011831:Radiation Genetics; D014364:Tryptophan / Q000378:metabolism; D014466:Ultraviolet Rays
chemical_list: D014364:Tryptophan; D000225:Adenine