title: Breakage prior to entry of donor DNA in Pneumococcus transformation.
mesh_terms: D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000378:metabolism*; D003851:Deoxyribonucleases / Q000494:pharmacology; D006146:Guanidines / Q000494:pharmacology; D007700:Kinetics; D012972:Sodium Hydroxide / Q000494:pharmacology; D013296:Streptococcus pneumoniae / Q000187:drug effects / Q000378:metabolism*; D014170:Transformation, Genetic; D014316:Tritium
chemical_list: D004269:DNA, Bacterial; D006146:Guanidines; D014316:Tritium; D012972:Sodium Hydroxide; D003851:Deoxyribonucleases