title: Studies on extrachromosomal DNA elements. Replication of the colicinogenic factor Col E1 in two temperature sensitive mutants of Escherichia coli defective in DNA replication.
mesh_terms: D002499:Centrifugation, Density Gradient; D002586:Cesium; D002712:Chlorides; D003087:Colicins / Q000096:biosynthesis*; D004261:DNA Replication; D004926:Escherichia coli / Q000187:drug effects / Q000378:metabolism*; D005111:Extrachromosomal Inheritance; D008937:Mitomycins / Q000494:pharmacology; D009154:Mutation; D010617:Phenanthridines; D013395:Sucrose; D013696:Temperature; D013941:Thymine / Q000378:metabolism; D014316:Tritium
chemical_list: D002712:Chlorides; D003087:Colicins; D008937:Mitomycins; D010617:Phenanthridines; D014316:Tritium; D002586:Cesium; D013395:Sucrose; D013941:Thymine