Predicted to enable RNA polymerase II-specific DNA-binding transcription factor binding activity; chromatin DNA binding activity; and transcription coactivator activity. Predicted to be involved in positive regulation of transcription by RNA polymerase II. Predicted to be located in nucleoplasm. Predicted to be active in nucleus. Is expressed in brain; notochord; and retina. Orthologous to human TOX2 (TOX high mobility group box family member 2). [provided by Alliance of Genome Resources, Apr 2022]