Predicted to enable RNA polymerase II cis-regulatory region sequence-specific DNA binding activity and protein dimerization activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Is an ortholog of C. elegans efl-1. In C. elegans, efl-1 is involved in several processes, including embryonic digestive tract morphogenesis; negative regulation of Ras protein signal transduction; and negative regulation of vulval development.