LactaseIntestine, SmallLactose IntoleranceIntestinesLactase-Phlorizin HydrolaseLactose Tolerance TestJejunumDisaccharidasesSucraseIntestine, LargeGalactosidasesIntestinal MucosaLactoseDown SyndromeIntestinal AbsorptionDNA Breaks, Double-Strandedbeta-GalactosidaseMilkIleumLactose SynthaseMicrovilliDuodenumMolecular Sequence DataModels, BiologicalNuclear EnvelopeTime FactorsKineticsEscherichia coliSymportersLactose FactorsSucrase-Isomaltase ComplexBreath TestsMicroscopy, ElectronIntestinal NeoplasmsColonYogurtCattlealpha-GlucosidasesAmino Acid SequenceThiogalactosidesHydrogen-Ion ConcentrationMutationHydrogenSwineDigestive SystemDigestionDNA RepairDNA Breaks, Single-StrandedBiological EvolutionEnterocytesMitosisDNA DamageIntestinal DiseasesMembrane Transport ProteinsMonosaccharide Transport ProteinsRNA, MessengerSpecies SpecificityNitrophenylgalactosidesCecumGastrointestinal MotilityCaco-2 CellsBacteriaWeaningTemperatureMicrotubulesMalabsorption SyndromesGalactosidesAnimals, NewbornDairy ProductsRats, Inbred StrainsSprue, TropicalCells, CulturedBacterial ProteinsDisaccharidesDNAProtein BindingPaneth CellsDietary CarbohydratesMethylgalactosidesGastrointestinal TransitStomachComputer SimulationGerm-Free LifeCalciumSodium-Glucose Transporter 1GlucoseBiological TransportDietModels, TheoreticalCell NucleusSignal TransductionEscherichia coli ProteinsOocytesBase SequenceLiverOligo-1,6-GlucosidaseStarchPhlorhizinEpitheliumJejunal Neoplasms