title: The topological trapping of circular DNAs on agarose: unexpected restrictions on DNA rotation.
mesh_terms: D002847:Chromatography, Agarose / Q000379:methods; D003090:Coliphages; D004264:DNA Topoisomerases, Type I / Q000378:metabolism; D004270:DNA, Circular; D004278:DNA, Superhelical; D004279:DNA, Viral; D004996:Ethidium; D005782:Gels; D009690:Nucleic Acid Conformation
chemical_list: D004270:DNA, Circular; D004278:DNA, Superhelical; D004279:DNA, Viral; D005782:Gels; D004264:DNA Topoisomerases, Type I; D004996:Ethidium