title: Deletion mutants of bacteriophage lambda. 3. Physical structure of att-phi.
mesh_terms: D002876:Chromosomes, Bacterial; D003090:Coliphages; D004269:DNA, Bacterial; D005559:Formamides; D005827:Genetics, Microbial; D008854:Microscopy, Electron; D008961:Models, Structural; D008967:Molecular Biology; D009154:Mutation; D009691:Nucleic Acid Denaturation
chemical_list: D004269:DNA, Bacterial; D005559:Formamides