title: Mechanism of DNA chain growth. I. Possible discontinuity and unusual secondary structure of newly synthesized chains.
mesh_terms: D001412:Bacillus subtilis; D002499:Centrifugation, Density Gradient; D002501:Centrifugation, Zonal; D003090:Coliphages; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004926:Escherichia coli / Q000378:metabolism; D008954:Models, Biological; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
chemical_list: D004269:DNA, Bacterial; D014316:Tritium; D013936:Thymidine