Predicted to enable DNA-binding transcription repressor activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and protein homodimerization activity. Predicted to be involved in cell fate specification and negative regulation of transcription by RNA polymerase II. Predicted to act upstream of or within embryonic cranial skeleton morphogenesis. Predicted to be located in nucleus. Predicted to be part of RNA polymerase II transcription repressor complex. Orthologous to human TBX15 (T-box transcription factor 15). [provided by Alliance of Genome Resources, Apr 2022]