Hydrogen-Ion ConcentrationAcidsSphagnopsidaHydrochloric AcidCathepsin EUreaseCulture MediaMolecular Sequence DataChromatography, High Pressure LiquidMolecular StructureSodium NitriteCircular DichroismBacterial ProteinsAcidosisGene Expression Regulation, BacterialAmino Acid SequenceSpiro CompoundsDrug StabilityTemperatureMagnetic Resonance SpectroscopyKineticsAlkaliesFerrous CompoundsAluminumSpectrophotometry, UltravioletMicrobial ViabilityOxidation-ReductionLiposomesProtein ConformationFerric CompoundsHydrolysisSpectrometry, FluorescenceEscherichia coliProtein DenaturationSolubilityNitritesModels, MolecularProtein FoldingHistidineRecombinant ProteinsSpectrometry, Mass, Electrospray IonizationFermentationStereoisomerismProtonsCattleProton-Translocating ATPasesChloridesLysosomesStress, PhysiologicalAmmoniaEnzyme StabilityHelicobacter pyloriElectrophoresis, Polyacrylamide GelPhysicochemical PhenomenaMicroscopy, Electron, TransmissionAnti-Bacterial AgentsBuffersEnzyme PrecursorsProtein Structure, SecondaryIndicators and ReagentsStomachModels, ChemicalSubstrate SpecificityCathepsinsMass SpectrometryPhosphatesAmyloidStructure-Activity RelationshipListeria monocytogenesColony Count, MicrobialSolutionsHot TemperatureProtein BindingChromatography, Thin LayerMicroscopy, Electron, ScanningCell LineSolventsMutationGenes, BacterialBase SequenceSequence AlignmentScattering, RadiationProtein Structure, TertiaryProtein Structure, QuaternaryIronAmino AcidsAdaptation, PhysiologicalDimerizationCell MembraneParticle SizeEscherichia coli ProteinsPhospholipidsCatalytic DomainLipid BilayersPeptidesDNA, BacterialMicrobial Sensitivity TestsLactic AcidChromatography, GelThermodynamics