title: The presence of DNA molecules with a displacement loop in standard mitochondrial DNA preparations.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D002645:Chickens; D004247:DNA / Q000302:isolation & purification; D005559:Formamides; D008722:Methods; D008854:Microscopy, Electron; D008930:Mitochondria, Liver; D008954:Models, Biological; D008961:Models, Structural; D009690:Nucleic Acid Conformation
chemical_list: D005559:Formamides; D004247:DNA