title: Variation in the rate of DNA chain growth through the S phase in HeLa cells.
mesh_terms: D001345:Autoradiography; D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D004261:DNA Replication; D006367:HeLa Cells / Q000378:metabolism*; D006801:Humans; D008938:Mitosis; D013936:Thymidine; D013997:Time Factors; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D014316:Tritium; D013936:Thymidine