Ampicillin ResistanceAmpicillinRepressor ProteinsPenicillin ResistanceR FactorsEscherichia coliPlasmidsHaemophilus influenzaeDNA, BacterialEnterococcus faeciumDrug Resistance, MicrobialAnti-Bacterial AgentsMicrobial Sensitivity Testsbeta-LactamasesDrug Resistance, BacterialConjugation, GeneticTetracyclineBase SequencePenicillinaseOperator Regions, GeneticGenes, BacterialBacterial ProteinsMolecular Sequence DataMutationPenicillinsDNA Transposable ElementsChloramphenicol ResistancePenicillin-Binding ProteinsExtrachromosomal InheritanceGenes, RegulatorDrug ResistanceDrug Resistance, Multiple, BacterialShigella sonneiHaemophilus ducreyiTransformation, BacterialTransformation, GeneticCloning, MolecularHaemophilus InfectionsTranscription FactorsTrimethoprimOperonLysogenyDNA Restriction EnzymesGenesEnterobacteriaceaeTetracycline ResistanceMuramoylpentapeptide CarboxypeptidasePenicillin GSulbactamPeptidyl TransferasesGene Expression Regulation, BacterialStreptomycinPromoter Regions, GeneticAmino Acid SequenceHexosyltransferasesGram-Positive Bacterial InfectionsSerine-Type D-Ala-D-Ala CarboxypeptidaseTranscription, GeneticViral Regulatory and Accessory ProteinsTibial NeuropathyChromosomes, BacterialDrug Resistance, NeoplasmDrug Resistance, MultiplePivampicillinDNA-Binding ProteinsFecesLac RepressorsRecombination, GeneticDNA, CircularColiphagesCulture MediaDisease ResistanceBacteriophage lambdaVascular ResistanceSequence Analysis, DNABacteriophagesNucleic Acid HybridizationPolymerase Chain ReactionDrug Resistance, ViralDNA, RecombinantChloramphenicolGene Expression RegulationGentamicinsRestriction MappingGenes, ViralEnterococcus faecalisbeta-Lactam ResistanceGenetic VectorsSulfamethoxazoleDNA, Viralbeta-LactamsCephalosporinsPenicillanic AcidPhenotypeCloxacillinProtein BindingPlant DiseasesBinding SitesDysentery, BacillaryAmoxicillin