title: Covalently closed, circular DNA in kappa endosymbionts of Paramecium.
mesh_terms: D000818:Animals; D001419:Bacteria; D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000032:analysis*; D004270:DNA, Circular / Q000032:analysis*; D008854:Microscopy, Electron; D009690:Nucleic Acid Conformation; D010247:Paramecium; D010641:Phenotype; D013559:Symbiosis
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular