Nat. Chem. Biol. 11, 634–635 (2015); published online 18 August 2015; corrected after print 23 September 2015

In the version of this article originally published, the protein ERRα was mislabeled as BRD4 in Figure 1 and its legend, and the citation of the figure in the text was misplaced. These errors have been corrected in the HTML and PDF versions of the article.