title: Mutants of satellite virus P4 that cannot derepress their bacteriophage P2 helper.
mesh_terms: D003090:Coliphages / Q000235:genetics*; D003433:Crosses, Genetic; D004261:DNA Replication; D004279:DNA, Viral / Q000096:biosynthesis; D004591:Electrophoresis, Polyacrylamide Gel; D005816:Genetic Complementation Test; D006378:Helper Viruses / Q000235:genetics*; D008242:Lysogeny; D009154:Mutation; D012526:Satellite Viruses / Q000235:genetics*; D014158:Transcription, Genetic; D014764:Viral Proteins / Q000096:biosynthesis; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D014764:Viral Proteins