DirectStimulatoryModificationKinasePhosphataseCaspaseReceptorCyclin,pro-apoptoticEnzymepro-survivalGAP/GEFGTPaseG-protein,ribosomalsubunitTranscriptionFactorTranscriptionalStimulationTranscriptionalInhibitionTranslocationSeparationofSubunitsorCleavageProductsJoiningofSubunitsDirectInhibitoryModificationMultistepStimulatoryModificationMultistepInhibitoryModificationTentativeStimulatoryModificationTentativeInhibitoryModificationSignalingPathwaysKeywww.cellsignal.com©2003-2010CellSignalingTechnology,Inc.AcetylaseDeacetylase