title: X-ray study of competence development in Bacillus subtilis.
mesh_terms: D001412:Bacillus subtilis / Q000528:radiation effects*; D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial; D005827:Genetics, Microbial; D011831:Radiation Genetics
chemical_list: D004269:DNA, Bacterial