Enables protein homodimerization activity. Involved in positive regulation of T cell mediated immunity; positive regulation of lymphocyte differentiation; and thymus development. Acts upstream of or within B cell differentiation and T cell differentiation in thymus. Predicted to be located in centrosome; nuclear body; and nuclear membrane. Predicted to be active in nucleoplasm. Is expressed in several structures, including alimentary system; cerebral cortex; female reproductive system; trigeminal ganglion; and urinary system. Orthologous to human ZBTB1 (zinc finger and BTB domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]