title: Heat-stable and density mutants of phages T1, T3 and T7.
mesh_terms: D002499:Centrifugation, Density Gradient; D002586:Cesium; D002712:Chlorides; D003090:Coliphages / Q000032:analysis / Q000254:growth & development / Q000302:isolation & purification; D004279:DNA, Viral / Q000032:analysis; D004926:Escherichia coli; D005827:Genetics, Microbial; D006358:Hot Temperature; D009154:Mutation; D010710:Phosphates; D010759:Phosphorus Isotopes; D013395:Sucrose; D013936:Thymidine; D014316:Tritium
chemical_list: D002712:Chlorides; D004279:DNA, Viral; D010710:Phosphates; D010759:Phosphorus Isotopes; D014316:Tritium; D002586:Cesium; D013395:Sucrose; D013936:Thymidine