title: Molecular recombination in a circular genome-phi X174 and S13.
mesh_terms: D000483:Alleles; D002499:Centrifugation, Density Gradient; D002875:Chromosomes / Q000032:analysis*; D003090:Coliphages; D003433:Crosses, Genetic; D004279:DNA, Viral / Q000032:analysis*; D004926:Escherichia coli / Q000032:analysis; D005827:Genetics, Microbial; D008854:Microscopy, Electron; D008954:Models, Biological; D009154:Mutation; D010759:Phosphorus Isotopes; D011995:Recombination, Genetic; D014762:Viral Interference
chemical_list: D004279:DNA, Viral; D010759:Phosphorus Isotopes