Nature Communications 4: Article number: 1565 (2013); Published: 5 March 2013; Updated: 29 August 2013.

An image in Supplementary Fig. S9b in this Article, reporting αH3K27me3/DAPI immunofluorescence in iPS cells from the ‘dKO’ group, was inadvertently duplicated from the ‘wt’ group. The correct version of the figure appears below.