Lactococcus lactisLactococcusNisinCheeseBacteriophagesGenes, BacterialMolecular Sequence DataDNA, BacterialBacteriocinsAcetoinPlasmidsBacterial ProteinsBase SequenceLactobacillusCloning, MolecularCultured Milk ProductsFermentationMilkAmino Acid SequenceConjugation, GeneticDiacetylGene Expression Regulation, BacterialFood MicrobiologyLactoseRestriction MappingChromosomes, BacterialOpen Reading FramesSequence Analysis, DNADNA Restriction-Modification EnzymesTransformation, BacterialCaseinsOperonCulture MediaDNA Transposable ElementsAmino Acids, Branched-ChainDeoxyribonucleases, Type II Site-SpecificSiphoviridaeAminopeptidasesLeuconostocSequence Homology, Amino AcidMycobacterium avium subsp. paratuberculosisMutagenesis, InsertionalEscherichia coliGenome, BacterialEndopeptidasesBlotting, SouthernSpecies SpecificityLysogenyCell WallSequence Homology, Nucleic AcidHydrogen-Ion ConcentrationDairy ProductsGenetic Complementation TestMultigene FamilyKluyveromycesRNA, BacterialLactic AcidNucleic Acid HybridizationTranscription, GeneticSequence AlignmentSubstrate SpecificityPolymerase Chain ReactionPhenotypeMutationStreptococcus thermophilusStreptococcusTemperature