title: An amber dna mutant of Escherichia coli K12 affecting DNA ligase.
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis; D002250:Carbon Radioisotopes; D004269:DNA, Bacterial / Q000096:biosynthesis; D004926:Escherichia coli / Q000378:metabolism / Q000528:radiation effects; D005796:Genes; D005804:Genes, Lethal; D006358:Hot Temperature; D007930:Leucine / Q000378:metabolism; D009154:Mutation; D009243:NAD; D010641:Phenotype; D011118:Polynucleotide Ligases; D013941:Thymine / Q000378:metabolism; D014161:Transduction, Genetic; D014316:Tritium; D014466:Ultraviolet Rays
chemical_list: D001426:Bacterial Proteins; D002250:Carbon Radioisotopes; D004269:DNA, Bacterial; D009243:NAD; D014316:Tritium; D011118:Polynucleotide Ligases; D007930:Leucine; D013941:Thymine