title: Variations in sedimentation patterns among deoxyribonucleic acids synthesized after infection of Escherichia coli by different amber mutants of bacteriophage T7.
mesh_terms: D002499:Centrifugation, Density Gradient; D003090:Coliphages; D004261:DNA Replication; D004279:DNA, Viral / Q000096:biosynthesis; D004926:Escherichia coli / Q000378:metabolism; D009154:Mutation; D014779:Virus Replication
chemical_list: D004279:DNA, Viral