Amino Acids, BasicAmino Acid SequenceProteomeMolecular Sequence DataSerineAmino AcidsMutagenesis, Site-DirectedSequence Homology, Amino AcidBase SequenceAmino Acids, DiaminoBinding SitesCloning, MolecularMutationProtein Structure, TertiaryProtein BindingRecombinant ProteinsSubstrate SpecificityKineticsModels, MolecularPeptide FragmentsCell LinePhosphorylationLysineAmino Acid SubstitutionStructure-Activity RelationshipProtein ConformationPeptidesEscherichia coliArginineProtein PrecursorsAmino Acid Transport Systems, BasicProtein Processing, Post-TranslationalSequence AlignmentDNAAmino Acid MotifsPlasmidsCattleRecombinant Fusion ProteinsElectrophoresis, Polyacrylamide GelSerine EndopeptidasesPhosphoserineProtein Structure, SecondaryPeptide MappingMolecular WeightTyrosineDNA, ComplementaryThreonineTransfectionBacterial ProteinsProtein KinasesProteinsPhosphoproteinsConserved SequenceMass SpectrometryHeparinEnzyme ActivationProtein-Serine-Threonine KinasesCOS CellsAlanineTrypsinCarrier ProteinsChromatography, High Pressure LiquidCysteineSequence Homology, Nucleic AcidDNA PrimersProteomicsHistidineMembrane ProteinsPoint MutationMutagenesisCells, CulturedDNA-Binding ProteinsHydrogen-Ion ConcentrationCell MembraneElectrophoresis, Gel, Two-DimensionalBlotting, WesternSaccharomyces cerevisiaeBiological TransportCatalysisHydrolysisRNA, MessengerHeLa CellsRestriction MappingCircular DichroismPhosphopeptidesSignal TransductionCricetinaeCyanogen BromideAmino Acid Transport SystemsTranscription, GeneticSequence DeletionCell NucleusProtein Kinase CEndopeptidasesCrystallography, X-RayRabbitsCatalytic DomainCytoplasmMacromolecular SubstancesNuclear Localization Signals