Nat. Genet. 40, 1065–1067 (2008); published online 10 August 2008; corrected after print 29 October 2008

In the version of this article initially published, there was an error in the text on page 1066. The protein interacting with CASK is the CASK interacting nucleosome assembly protein (CINAP/TSPYL2) and not the TATA-binding protein associated factor TAF9. This error has been corrected in the HTML and PDF versions of the article.