Synonyms:CTG repeat protein 26, CTG26, N CoR2, NCOR2, Nuclear receptor corepressor 2, SMAP270, SMRT, SMRTE, SMRTE tau, T3 receptor associating factor, TNRC14, TRAC, TRAC 1, TRAC1 Background:Transcriptional corepressor. Mediates the transcriptional repression activity of some nuclear receptors by promoting chromatin condensation, thus preventing access of the basal transcription. Isoform 1 and isoform 5 have different affinities for different nuclear receptors. Involved in the regulation BCL6-dependent of the germinal center(GC) reactions, mainly through the control of the GC B-cells proliferation and survival.