Enables several functions, including DNA binding activity; Krueppel-associated box domain binding activity; and transcription corepressor binding activity. Involved in several processes, including animal organ development; histone deacetylation; and regulation of gene expression. Acts upstream of or within several processes, including histone modification; nervous system development; and regulation of signal transduction. Located in heterochromatin; nucleus; and replication fork. Part of RNA polymerase II transcription repressor complex. Is expressed in several structures, including alimentary system; brain; early conceptus; genitourinary system; and sensory organ. Human ortholog(s) of this gene implicated in stomach cancer. Orthologous to human HDAC2 (histone deacetylase 2). [provided by Alliance of Genome Resources, Apr 2022]