Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Involved in several processes, including epidermal cell fate specification; negative regulation of transcription by RNA polymerase II; and nematode male tail tip morphogenesis. Located in nucleus. Expressed in several structures, including E lineage cell; embryonic cell; intestine;
mc3V; and pharyngeal cell. Is an ortholog of human HES5 (hes family bHLH transcription factor 5).