OligopeptidesDipeptidesMembrane Transport ProteinsSymportersCephalexinGlycylglycineCefadroxilAmino Acid SequenceCarrier ProteinsMolecular Sequence DataBacterial ProteinsBiological TransportLactococcus lactisPeptidesStreptococcus thermophilusPeptoidsLipoproteinsAdministration, MucosalSubstrate SpecificityCarnosineMicrocystisPeptide Termination FactorsKineticsEnkephalin, Leucine-2-AlanineApiaceaeXenorhabdusMycoplasma hominisNetropsinEscherichia coliGene Expression Regulation, BacterialRepetitive Sequences, Amino AcidOperonCaco-2 CellsCloning, MolecularBase SequenceBiological Transport, ActiveAmino AcidsHydrogen-Ion ConcentrationMicrovilliIntestinal AbsorptionPheromonesPlasmidsEndopeptidasesMutationSelectinsProtein BindingStructure-Activity RelationshipProtein ConformationHydrolysisPeptide FragmentsReceptors, Formyl PeptideBinding, CompetitiveSequence AlignmentATP-Binding Cassette TransportersMilkGenetic Complementation TestGenes, BacterialFungal ProteinsSequence Homology, Amino AcidBinding SitesProtonsMolecular WeightIntestinesBacillus subtilisRecombinant ProteinsGene DeletionPrionsSalmonella typhimuriumCaseinsValineAnti-Bacterial AgentsHistidinePeptide HydrolasesAlanineSaccharomyces cerevisiaeEscherichia coli ProteinsRabbitsRecombinant Fusion ProteinsLeucinePeptide LibraryProtein EngineeringPeptides, CyclicProtein TransportModels, MolecularProtein Structure, TertiaryCircular DichroismRNA, MessengerIntestine, SmallMembrane ProteinsN-Formylmethionine Leucyl-PhenylalanineStereoisomerismSpores, BacterialMetalloendopeptidasesMultigene FamilySerine EndopeptidasesXenopus laevisSaccharomyces cerevisiae ProteinsSequence Analysis, DNAElectrophoresis, Polyacrylamide Gelbeta-Galactosidase