Nature Reviews Molecular Cell Biology 14, 445–453 (2013)

On page 443 of this article, the incorrect references were cited at the end of the following sentence: “Four years ago, macrodomains were shown to be able to bind PAR that has been synthesized in response to DNA damage18–20.” The authors meant to refer to references 20, 25 and 26 at the end of this sentence. This has been corrected online. The authors apologize to the authors of references 25 and 26 for this mistake and for any confusion caused to readers.