title: A genetic switch in a bacterial virus.
mesh_terms: D010582:Bacteriophage lambda / Q000235:genetics*; D002352:Carrier Proteins / Q000378:metabolism; D004268:DNA-Binding Proteins; D005786:Gene Expression Regulation; D005814:Genes, Viral; D008242:Lysogeny; D009690:Nucleic Acid Conformation; D009876:Operon; D011487:Protein Conformation; D012097:Repressor Proteins / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics*
chemical_list: D002352:Carrier Proteins; D004268:DNA-Binding Proteins; D012097:Repressor Proteins; D014157:Transcription Factors