Enables transcription corepressor activity. Involved in several processes, including negative regulation of neuron apoptotic process; response to electrical stimulus; and response to peptide hormone. Acts upstream of or within negative regulation of apoptotic process; negative regulation of transcription by RNA polymerase II; and neuron differentiation. Predicted to be active in cytoplasm and nucleus. Biomarker of acute necrotizing pancreatitis and brain ischemia. Orthologous to human BTG2 (BTG anti-proliferation factor 2). [provided by Alliance of Genome Resources, Apr 2022]