- Inhibitors of transcription such as 5,6-dichloro-1-beta-D-ribofuranosylbenzimidazole and isoquinoline sulfonamide derivatives (H-8 and H-7) promote dephosphorylation of the carboxyl-terminal domain of RNA polymerase II largest subunit. Dubois, M.F., Nguyen, V.T., Bellier, S., Bensaude, O. J. Biol. Chem. (1994)