Lactose IntoleranceMembrane Transport ProteinsLactose Tolerance TestSymportersThiogalactosidesMonosaccharide Transport ProteinsLactose SynthaseMelibioseNitrophenylgalactosidesAmino Acid Transport SystemsEscherichia coli ProteinsLactoseNucleobase Transport ProteinsEscherichia coliPhosphoenolpyruvate Sugar Phosphotransferase SystemMethylgalactosidesGalactosidesLactose FactorsLactaseBiological TransportMaltoseGalactosidasesMilkBiological Transport, ActiveMolecular Sequence DataAmino Acid Transport Systems, NeutralBacterial ProteinsAmino Acid Transport Systems, BasicThioglycosidesMutationLac OperonCarbohydrate MetabolismAmino Acid SequenceDisaccharidesHydrogenEthylmaleimideKineticsGlycosidesYogurtGenes, BacterialOperonBreath TestsSaccharomyces cerevisiaeIsopropyl ThiogalactosidePlasmidsBase SequenceGene Expression Regulation, BacterialGlucoseSaccharomyces cerevisiae ProteinsCell MembranePowdersSubstrate SpecificityLactococcus lactisMutagenesis, Site-DirectedDairy ProductsEnzyme InductionCloning, MolecularFlatulenceCulture MediaHydrogen-Ion ConcentrationCellobioseGalactosephosphatesLactalbuminProtein Structure, SecondaryMannitolGenetic Complementation TestCysteineCarrier ProteinsProlineGalactoseKluyveromycesProtein ConformationSucroseEnzyme RepressionTryptophanMembrane ProteinsDNA, BacterialCarbohydratesGenes, FungalLac RepressorsFungal ProteinsAmino AcidsNitrogenSalmonella typhimuriumGene Expression Regulation, FungalStreptococcusRaffinoseLactationModels, StructuralBinding SitesGlucosidesHistidineLactase-Phlorizin HydrolaseFructoseExcipientsStructure-Activity RelationshipProtonsBenzoic AcidMutagenesis, InsertionalPeriplasmic Binding Proteins