title: Paper strip method for assaying gradient fractions containing radioactive macromolecules.
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D003597:Cytosine Nucleotides / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis; D008722:Methods; D010209:Paper; D011119:Polynucleotides / Q000032:analysis; D011874:Radiometry; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D003597:Cytosine Nucleotides; D004279:DNA, Viral; D011119:Polynucleotides; D014316:Tritium