title: Isolation of closed-circular duplex DNA by chromatography on hydroxyapatite in the presence of ethidium bromide.
mesh_terms: D002499:Centrifugation, Density Gradient; D002845:Chromatography / Q000379:methods; D004269:DNA, Bacterial / Q000302:isolation & purification / Q000378:metabolism; D004270:DNA, Circular / Q000302:isolation & purification* / Q000378:metabolism; D004926:Escherichia coli / Q000032:analysis*; D004996:Ethidium / Q000378:metabolism; D006882:Hydroxyapatites; D010957:Plasmids; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular; D006882:Hydroxyapatites; D004996:Ethidium