Replication of the DNA of the colicinogenic factor E 1 (Col E 1 ) at the restrictive temperature in a DNA replication mutant thermosensitive for DNA polymerase. 3.

Autoradiography Centrifugation, Density Gradient Chromosomes, Bacterial/analysis DNA Nucleotidyltransferases/metabolism DNA Replication DNA, Bacterial/analysis,isolation & purification Escherichia coli/enzymology Genetics, Microbial Molecular Weight Mutation Phosphorus Isotopes Temperature Thymidine/metabolism Tritium

DNA, Bacterial Phosphorus Isotopes Tritium DNA Nucleotidyltransferases Thymidine