title: More on mutants with altered DNA's.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001407:Bacillus / Q000302:isolation & purification; D001419:Bacteria / Q000302:isolation & purification; D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000032:analysis*; D003854:Deoxyribonucleotides / Q000032:analysis; D004352:Drug Resistance, Microbial; D008854:Microscopy, Electron; D009154:Mutation
chemical_list: D000900:Anti-Bacterial Agents; D004269:DNA, Bacterial; D003854:Deoxyribonucleotides