title: The intracellular forms of T7 and P22 DNA molecules.
mesh_terms: D002499:Centrifugation, Density Gradient; D002875:Chromosomes; D003090:Coliphages; D004261:DNA Replication; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004279:DNA, Viral / Q000032:analysis / Q000096:biosynthesis*; D008854:Microscopy, Electron; D012483:Salmonella Phages; D012486:Salmonella typhimurium / Q000378:metabolism; D014779:Virus Replication
chemical_list: D004269:DNA, Bacterial; D004279:DNA, Viral