Vol. 187 No. 5, November 30, 2009. Pages 637–653.

An error was introduced into the text of this article during in-house copyediting. We apologize to the authors for this oversight. The correct sentence from the introduction appears below.

Phosphorylation of a TSS motif near the INCENP C terminus leads to full kinase activation through a feedback mechanism (Bishop and Schumacher, 2002; Bolton et al., 2002; Honda et al., 2003).

The html and pdf versions of this article have been corrected. The error remains only in the print version.