Component of the RPD3 histone deacetylase complex RPD3C(L) responsible for the deacetylation of lysine residues on the N-terminal part of the core histones (H2A, H2B, H3 and H4). Histone deacetylation gives a tag for epigenetic repression and plays an important role in transcriptional regulation, cell cycle progression and developmental events. TOD6 binds to sequences containing the core CGATG, which resembles the PAC (Polymerase A and C) motif. Component of the RPD3C(L) complex composed of at least ASH1, CTI6, DEP1, DOT6, PHO23, RPD3, RXT2, RXT3, SAP30, SDS3, SIN3, TOD6; UME1 and UME6. Present with 830 molecules/cell in log phase SD medium. Belongs to the DOT6 family.