TFIIF is a general transcription initiation factor that binds to RNA polymerase II and helps to recruit it to the initiation complex in collaboration with TFIIB. It promotes transcription elongation (By similarity). Component of the fcp1/TFIIF/polII complex via interaction of tfg3 with both tfg1/TFIIF-alpha and tfg2/TFIIF-beta subunits. Belongs to the TFIIF beta subunit family.