title: Electron microscopical and cultural features of Neisseria meningitidis competence variants.
mesh_terms: D002876:Chromosomes, Bacterial; D003470:Culture Media; D004269:DNA, Bacterial; D008854:Microscopy, Electron; D009154:Mutation; D009345:Neisseria meningitidis / Q000166:cytology* / Q000254:growth & development / Q000302:isolation & purification; D013194:Staining and Labeling; D014170:Transformation, Genetic
chemical_list: D003470:Culture Media; D004269:DNA, Bacterial