Jun dimerization protein 2 （JDP2） is a component of the AP-1 transcription factor which inhibits transactivation mediated by the Jun family of proteins. JDP2 is involved in various transcriptional responses associated with AP-1 such as UV-induced apoptosis， cell differentiation， tumorigenesis and antitumogeneris. In addition， JDP2 can act as a repressor by recruiting histone deacetylase 3/HDAC3 to the promoter region of JUN. JDP2 controls transcription via direct regulation of the modification of histones and the assembly of chromatin.
