Nat. Chem. Biol. 9, 307–312 (2013); published online 17 March 2013; corrected after print 19 April 2013

In the version of this article initially published, the authors wrote, “we first treated BT474 human breast cancer cells with the clinically approved ATP-competitive tyrosine kinase inhibitor lapatinib and found that this resulted in the displacement of Cdc37 and Hsp90 from the target kinase ErbB2,” which implied that lapatinib promoted dissociation of ErbB2 from both Cdc37 and Hsp90, but the data for ErbB2 showed complete displacement of Cdc37 but not Hsp90. The error has been corrected in the HTML and PDF versions of the article.