Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularMutationMolecular Sequence DataBase SequenceAmino Acids, EssentialSequence AlignmentAmino Acid Transport SystemsBinding SitesEscherichia coliKineticsMutagenesis, Site-DirectedProtein BindingDNA, ComplementaryAmino Acid MotifsProtein Structure, TertiaryModels, MolecularRecombinant ProteinsRoleNeutral RedSubstrate SpecificityCell LineDNAAmino Acids, AromaticSequence Homology, Nucleic AcidProtein ConformationPeptide FragmentsLeucineAmino Acids, Branched-ChainRNA, MessengerBacterial ProteinsAmino Acids, SulfurStructure-Activity RelationshipSaccharomyces cerevisiaeMolecular WeightRecombinant Fusion ProteinsSignal TransductionProteinsAmino Acids, NeutralPeptidesDNA PrimersNeutral CeramidaseGene Expression Regulation, DevelopmentalCarrier ProteinsBiological TransportPlasmidsConserved SequenceDNA-Binding ProteinsPhylogenyRestriction MappingAlanineHydrogen-Ion ConcentrationMembrane ProteinsElectrophoresis, Polyacrylamide GelSequence Analysis, DNATranscription FactorsAmino Acid Transport Systems, BasicChromatography, High Pressure LiquidGenes, BacterialPhenotypeProtein Structure, SecondaryMutagenesisTranscription, GeneticSpecies SpecificitySequence DeletionLysineModels, BiologicalCattleTransfectionIsoleucineSaccharomyces cerevisiae ProteinsBlotting, NorthernGene ExpressionFungal ProteinsAmino Acids, BasicCodonPlant ProteinsCells, CulturedIn Situ HybridizationTrypsinCell MembraneAmino Acids, DiaminoGlycineEvolution, MolecularGlutamineCyanogen BromideGenesArginineViral ProteinsAmino Acid Transport System AOpen Reading FramesPhenylalanineValineAspartic AcidMethionineDrosophila ProteinsProtein Biosynthesis