Nat. Biotechnol. 28, 311–314 (2010); published online 8 April 2010; corrected after print 15 April 2010

In the version of the article originally published, Michael Tolentino was misquoted to the effect that bevasiranib had been shown to persist indefinitely in post-mitotic cells. Tolentino actually stated that the RNA-induced signaling complex persists. The error has been corrected in the HMTL and PDF versions of the article.