title: Study of x-irradiated DNA using formamide gradients.
mesh_terms: D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D004926:Escherichia coli / Q000032:analysis*; D005559:Formamides; D006358:Hot Temperature; D008722:Methods; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D013936:Thymidine; D013997:Time Factors; D014316:Tritium
chemical_list: D004269:DNA, Bacterial; D005559:Formamides; D014316:Tritium; D013936:Thymidine