You'd Prefer An Argonaute

B2 RNA and Alu RNA repress transcription by disrupting contacts between RNA polymerase II and promoter DNA within assembled complexes

Petro Yakovchuk, James A. Goodrich, and Jennifer F. Kugel

PNAS 106 (14): 5569-74, April 2009.
doi: 10.1073/pnas.0810738106