Transcription factor E2F1 (aa314-327) (E2F1, E2F Transcription factor 1, E2F-1, RBAP1, RBBP3, RBP3, PBR3, PRB-binding protein E2F-1, RBAP-1, RBBP-3, Retinoblastoma-associated protein 1, Retinoblastoma-binding protein 3)