ThreonineSerineAmino Acid SequencePhosphorylationPhosphothreonineMolecular Sequence DataMutagenesis, Site-DirectedPhosphoserineThreonine DehydrataseBinding SitesProtein-Serine-Threonine KinasesSerine EndopeptidasesSequence Homology, Amino AcidSubstrate SpecificityBase SequenceMutationProtein KinasesProtein Structure, TertiaryKineticsModels, MolecularPeptide MappingProtein BindingRecombinant ProteinsAmino AcidsCell LineAmino Acid SubstitutionPhosphopeptidesCloning, MolecularProtein ConformationAcetylglucosaminePhosphoprotein PhosphatasesProtein Processing, Post-TranslationalPeptide FragmentsGlycosylationPhosphoamino AcidsEnzyme ActivationStructure-Activity RelationshipSerine ProteasesSerine Proteinase InhibitorsSequence AlignmentEscherichia coliRecombinant Fusion ProteinsPhosphoproteinsProtein Structure, SecondaryElectrophoresis, Polyacrylamide GelN-AcetylgalactosaminyltransferasesTyrosineSignal TransductionPeptidesTransfectionAlanineCatalytic DomainAmino Acid MotifsCatalysisTrypsinConserved SequenceProtein Kinase CCasein Kinase IIProtein Phosphatase 2COS CellsMolecular WeightPoint MutationOkadaic AcidBacterial ProteinsCalcium-Calmodulin-Dependent Protein KinasesCysteineProtein Phosphatase 1Mass SpectrometryCattleCrystallography, X-RayDNA PrimersProteinsChromatography, High Pressure LiquidMembrane ProteinsHeLa CellsDNA, ComplementaryMutagenesisN-AcetylglucosaminyltransferasesCell MembraneLysineCricetinaeDNACells, CulturedProtein-Tyrosine KinasesPrecipitin TestsCasein KinasesEnzyme InhibitorsIsoenzymesPhosphorus RadioisotopesBlotting, WesternPlasmidsCHO CellsCarrier ProteinsSaccharomyces cerevisiaeHydrogen-Ion ConcentrationChromatography, GelIsoleucinePhosphotyrosineDNA-Binding ProteinsHydrolysis