Predicted to enable RNA polymerase II-specific DNA-binding transcription factor binding activity; transcription regulator inhibitor activity; and transmembrane transporter binding activity. Involved in several processes, including cellular response to follicle-stimulating hormone stimulus; negative regulation of macromolecule metabolic process; and positive regulation of cell population proliferation. Located in chromatin; cytosol; and nucleus. Orthologous to human ID2 (inhibitor of DNA binding 2). [provided by Alliance of Genome Resources, Apr 2022]