Predicted to enable RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Predicted to be involved in cell differentiation and negative regulation of G1/S transition of mitotic cell cycle. Predicted to act upstream of or within regulation of cell cycle and regulation of transcription by RNA polymerase II. Predicted to be located in nucleus. Predicted to be part of transcription regulator complex. Predicted to be active in chromatin. Orthologous to human RBL1 (RB transcriptional corepressor like 1).