This domain is found on transcriptional regulators. It forms interactions with histone deacetylases [1].

1: Alp13, an MRG family protein, is a component of fission yeast Clr6 histone deacetylase required for genomic integrity. Nakayama J, Xiao G, Noma K, Malikzay A, Bjerling P, Ekwall K, Kobayashi R, Grewal SI; EMBO J 2003;22:2776-2787. PMID:12773392

2: Repression by Ume6 involves recruitment of a complex containing Sin3 corepressor and Rpd3 histone deacetylase to target promoters. Kadosh D, Struhl K; Cell. 1997;89:365-371. PMID:9150136