Gastric AcidPentagastrinGastric JuiceGastrinsMicroscopy, ElectronElectronsGastric MucosaAcid-Base EquilibriumBase PairingElectron TransportBase SequenceMicroscopy, Electron, ScanningGastric Acidity DeterminationHydrogen-Ion ConcentrationParietal Cells, GastricAcid-Base ImbalanceStomachAchlorhydriaBethanechol CompoundsSecretory RateKineticsHistamine H2 AntagonistsPeptonesHistamineDuodenal UlcerCimetidineAnti-Ulcer AgentsVagotomyOmeprazoleCytosineNucleic AcidsGuanineVagotomy, Proximal GastricModels, MolecularMolecular Sequence DataFamotidineBicarbonatesThermodynamicsStomach UlcerH(+)-K(+)-Exchanging ATPaseHydrochloric AcidCarbocysteineVagus NerveHydrogen BondingBinding SitesTetragastrinMicroscopy, Electron, TransmissionCatalysisAntacids2-PyridinylmethylsulfinylbenzimidazolesMetiamideProton Pump InhibitorsAminopyrineGastric FistulaAlkalosisModels, ChemicalDNAElectron Spin Resonance SpectroscopyAcidsAmino Acid SequencePurinesNucleic Acid ConformationAcidosisAdenineZollinger-Ellison SyndromeSomatostatinProtein ConformationAlkaliesBethanecholPepsin ARanitidineSecretinProtein BindingEscherichia coliGastric EmptyingCrystallography, X-RayBase CompositionEnterochromaffin-like CellsAlkalosis, RespiratoryRabeprazoleMagnetic Resonance SpectroscopyOxidation-ReductionDNA, B-FormBenzoxepinsTemperatureDuodenumPyloric AntrumNucleic Acid DenaturationLansoprazoleUracilProtonsXanthopterinFoodSpectrophotometry, UltravioletPylorusEducation, VeterinarySodium BicarbonateGastrin-Secreting CellsSchiff BasesMolecular Conformation