Enables chromatin binding activity and enzyme binding activity. Involved in erythrocyte differentiation; negative regulation of gene expression; and positive regulation of megakaryocyte differentiation. Predicted to be located in nucleoplasm. Predicted to be part of DNA repair complex; histone deacetylase complex; and transcription repressor complex. Is expressed in brain; early embryo; extraembryonic component; and nose. Orthologous to human RCOR1 (REST corepressor 1). [provided by Alliance of Genome Resources, Apr 2022]