title: The interaction of closed circular DNA with intercalative dyes. I. The superhelix density of SV40 DNA in the presence and absence of dye.
mesh_terms: D002499:Centrifugation, Density Gradient; D002586:Cesium; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004396:Coloring Agents / Q000494:pharmacology*; D003201:Computers; D004247:DNA; D004279:DNA, Viral; D003720:Densitometry; D008433:Mathematics; D008970:Molecular Weight; D013539:Simian virus 40; D014461:Ultracentrifugation
chemical_list: D004396:Coloring Agents; D004279:DNA, Viral; D002586:Cesium; D004247:DNA