ERRATUM
Volume 32, no. 9, p. 1592–1603, 2012, https://doi.org/10.1128/MCB.00111-12. Page 1596, : The representative Southern image uploaded for WT + mus81-dd-MMS4 was incorrect. By mistake the image uploaded was the same one used to illustrate the WT + MUS81-MMS4 control. The corrected image of the WT + mus81-dd-MMS4 Southern blot is shown below. We apologize for this unintentional error, which did not impact the results or conclusions of the study.