Owing to an error in the advance online publication (AOP) of Gambus et al. (Nature Cell Biol. 2006; DOI: 10.1038/ncb1382), the author contributions were listed incorrectly. The corrected text should read as follows:

AUTHOR CONTRIBUTIONS

A.G. performed all the experiments except for the Mrc1, Tof1 and Csm3 ChIP experiments in Fig. 6c, which were carried out by M.K, and the purification in Supplementary Information, Fig. S1, which were performed by A.S.D. All the mass spectrometry analysis was performed by R.C.J., A.G generated the antibodies against GINS and Ctf4, and F.V.D. made all the other antibodies raised for this study.

Also, in the author affiliations 'FDA/NCTR' was not spelled out in full. This should read as follows:

Food and Drug Administration, National Center for Toxicological Research (FDA/NCTR).

These errors have been corrected online.