title: Order of injection of T7 bacteriophage DNA.
abstract: The deoxyribonucleic acid (DNA) corresponding to the left-hand end of the genetic map is injected first in T7 phage infection. The order was deduced by use of marker rescue experiments to see which genes are still injected after the double-stranded DNA chain is broken by X rays. The treatment causes a selective loss of genes located on the right side of the map. Presumably, this corresponds to the tail end of normally injected DNA, and X rays cut off this end.
mesh_terms: D002874:Chromosome Mapping; D003090:Coliphages / Q000528:radiation effects; D004267:DNA Viruses / Q000528:radiation effects; D004279:DNA, Viral / Q000528:radiation effects; D004926:Escherichia coli; D005796:Genes; D009154:Mutation; D010759:Phosphorus Isotopes; D011830:Radiation Effects; D011995:Recombination, Genetic / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D004279:DNA, Viral; D010759:Phosphorus Isotopes