Enables transcription corepressor activity. Predicted to be involved in cell differentiation and negative regulation of transcription, DNA-templated. Predicted to act upstream of or within negative regulation of transcription by RNA polymerase II. Predicted to be located in cytoplasmic ribonucleoprotein granule and nucleus. Predicted to be active in nucleoplasm. Is expressed in embryo. Orthologous to human EID1 (EP300 interacting inhibitor of differentiation 1). [provided by Alliance of Genome Resources, Apr 2022]