TFIIF binds toRNA polymerase II when the enzyme is already unbound to any other transcription factor, thus preventing it from contacting DNA outside thepromoter. Furthermore, TFIIF stabilizes the RNA polymerase II while it's contactingTBP andTFIIB.
^Finkelstein A, Kostrub CF, Li J, Chavez DP, Wang BQ, Fang SM, Greenblatt J, Burton ZF (1992). "A cDNA encoding RAP74, a general initiation factor for transcription by RNA polymerase II".Nature.355 (6359):464–7.Bibcode:1992Natur.355..464F.doi:10.1038/355464a0.PMID1734284.S2CID1241044.
^Heng HH, Xiao H, Shi XM, Greenblatt J, Tsui LC (1994). "Genes encoding general initiation factors for RNA polymerase II transcription are dispersed in the human genome".Hum. Mol. Genet.3 (1):61–4.doi:10.1093/hmg/3.1.61.PMID8162052.
^Purrello M, Di Pietro C, Rapisarda A, Mirabile E, Motta S, Sichel G, Grzeschik KH (1995). "Genetic characterization of general transcription factors TFIIF and TFIIB of Homo sapiens sapiens".Cytogenet. Cell Genet.69 (1–2):75–80.doi:10.1159/000133942.PMID7835093.