title: Molecular recombination in the ligase negative T4 amber mutant.
mesh_terms: D002499:Centrifugation, Density Gradient; D002701:Chloramphenicol / Q000494:pharmacology*; D003090:Coliphages / Q000378:metabolism; D004261:DNA Replication / Q000187:drug effects*; D004279:DNA, Viral / Q000096:biosynthesis / Q000378:metabolism*; D003851:Deoxyribonucleases / Q000378:metabolism; D004926:Escherichia coli / Q000378:metabolism*; D005827:Genetics, Microbial; D008025:Ligases / Q000378:metabolism; D008854:Microscopy, Electron; D009154:Mutation; D010759:Phosphorus Isotopes; D011995:Recombination, Genetic / Q000187:drug effects*; D014316:Tritium
chemical_list: D004279:DNA, Viral; D010759:Phosphorus Isotopes; D014316:Tritium; D002701:Chloramphenicol; D003851:Deoxyribonucleases; D008025:Ligases