Predicted to enable translation initiation factor binding activity. Predicted to be involved in transcription initiation at RNA polymerase II promoter. Predicted to act upstream of or within DNA-templated transcription initiation. Predicted to be located in nucleus. Predicted to be part of RNA polymerase II, core complex. Is expressed in several structures, including blastomere; heart; liver; nervous system; and pleuroperitoneal region. Orthologous to human POLR2D (RNA polymerase II subunit D).