Bacteriophage lambdaViral Regulatory and Accessory ProteinsOperator Regions, GeneticChromatesVesivirusRepressor ProteinsLysogenyChromium CompoundsViral ProteinsChromiumHelix-Turn-Helix MotifsCeftriaxoneGenes, SwitchDNA-Binding ProteinsCrotalusCrocusRho FactorAnimals, ZooColiphagesEscherichia coliBacteriophage P22Molecular Sequence DataLactobacillus caseiBase SequencePotassium Compounds