title: Tandem genetic duplications in phage lambda. III. The frequency of duplication mutants in two derivatives of phage lambda is independent of known recombination systems.
mesh_terms: D002499:Centrifugation, Density Gradient; D003090:Coliphages; D004279:DNA, Viral; D004926:Escherichia coli; D009154:Mutation; D010641:Phenotype; D011995:Recombination, Genetic; D012641:Selection, Genetic
chemical_list: D004279:DNA, Viral