SerinePhosphoprotein PhosphatasesProtein Phosphatase 2Protein Phosphatase 1Okadaic AcidProtein-Serine-Threonine KinasesPhosphorylationMolecular Sequence DataAmino Acid SequenceSerine EndopeptidasesOxazolesThreonineEthers, CyclicPhosphoserineSequence Homology, Amino AcidProtein KinasesCasein Kinase IIMicrocystinsSubstrate SpecificityPhosphothreonineSerine ProteasesSerine Proteinase InhibitorsEnzyme ActivationBase SequenceCloning, MolecularEnzyme InhibitorsCell LineSignal TransductionRecombinant ProteinsCatalytic DomainCalcium-Calmodulin-Dependent Protein KinasesImmunoprecipitationGlycogen Synthase Kinase 3DNA, ComplementaryMutagenesis, Site-DirectedPhosphoproteinsProtein Kinase CProtein BindingBinding SitesCatalysisTyrosineKineticsSerine C-PalmitoyltransferaseProtein-Tyrosine KinasesCell NucleusTransfectionDown-RegulationCells, CulturedSaccharomyces cerevisiaeTumor Cells, CulturedGene ExpressionRNA, MessengerSerine O-AcetyltransferaseGlycine HydroxymethyltransferaseMutationMannose-Binding Protein-Associated Serine ProteasesSerpinsAmino AcidsL-Serine DehydrataseProtein Structure, TertiaryIsoflurophateProtease InhibitorsPeptide MappingPhenylmethylsulfonyl FluorideTrypsinCathepsin GAmino Acid SubstitutionGlycineEndopeptidasesSequence AlignmentProtein Processing, Post-TranslationalElectrophoresis, Polyacrylamide GelCysteineRacemases and EpimerasesChymotrypsinPhosphoglycerate DehydrogenaseModels, MolecularPhosphopeptidesAlanineEscherichia coliStructure-Activity RelationshipPhosphoamino AcidsPeptide FragmentsProtein ConformationRecombinant Fusion ProteinsCOS CellsSubtilisinsMolecular WeightTrypsin InhibitorsBlotting, WesternHydrolysisPeptide HydrolasesPancreatic ElastaseSubtilisinLeukocyte ElastaseDNA PrimersKallikreinsPeptidesEnzyme PrecursorsHeLa Cells