Actin is part of pre-initiation complexes and is necessary for transcription by RNA polymerase II. - Hofmann WA; Stojiljkovic L; Fuchsova B; Vargas GM; Mavrommatis E; Philimonenko V; Kysela K; Goodrich JA; Lessard JL; Hope TJ; Hozak P; de Lanerolle P (Nature cell biology, 2004)