title: The use of formamide gradients to distinguish between alkali labile regions and single strand breaks in DNA.
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D002850:Chromatography, Gel; D004269:DNA, Bacterial / Q000302:isolation & purification / Q000528:radiation effects; D004926:Escherichia coli; D005559:Formamides; D008466:Mechlorethamine; D009113:Muramidase; D010636:Phenols; D011830:Radiation Effects; D013395:Sucrose; D014466:Ultraviolet Rays
chemical_list: D002247:Carbon Isotopes; D004269:DNA, Bacterial; D005559:Formamides; D010636:Phenols; D008466:Mechlorethamine; D013395:Sucrose; D009113:Muramidase