Immunogen sequence: PSAEGGSTSS TLRAAASKLE QGKRVSEMPA AKRLRLDTGP QSLSGKSTPQ PPSGKTTPNS GDVQVTEDAV RRYLTRKPMT TKDLLKKFQT KKTGLSSEQT VNVLAQILKR LNPERKMIND KMHFSLKE. TFIIF is a general transcription initiation factor that binds to RNA polymerase II and helps