Nat. Biotechnol. 27, 581–582 (2009); published online 8 July 2009; corrected after print 8 October 2009

In the version of this article initially published, the writer incorrectly states that “BiPar was spun out of Genentech to develop small-molecule inhibitors....” The text should have read “BiPar was set up to develop small-molecule inhibitors....” The error has been corrected in the HTML and PDF versions of the article.