Acetyl mimetic RIP140 associates with repressive cofactors on promoter ChIP monitoring proteins associated with acetyl mimetic RIP140 CP (K158/287Q) and acetyl negative RIP140 CN (K158/287A) mutants transfected in undifferentiated 3T3-L1 cells, and detection of various epigenetic markers on GC box region. CP, Constitutive positive; CN, constititive negative; Cyc C, Cyclin C; CMV, cytomegalovirus.