Correction to: Nature https://doi.org/10.1038/s41586-018-0080-8, published online 02 May 2018.

In Fig. 4a of this Letter, the ‘Open chromatin’ label should have been centred above the first three columns, and the black horizontal line underneath the label should have been removed. In addition, there should have been a vertical black line between the last two sets of panels for consistency. This figure has been corrected online, and the original Fig. 4 is shown as Supplementary Information to this Amendment, for transparency. In addition, in Fig. 1b, the promoter arrows and genes should have been aligned, and in Fig. 1d the transcription factors shown on the right of the panel should have been coloured as shown on the left, instead of in black font. Finally, in the legend to Fig. 3, the text ‘3 × peak lengths’ and ‘2 × peak lengths’ should have been reversed. These errors have all been corrected online.

Supplementary Information is available for this paper at https://doi.org/10.1038/s41586-018-0267-z.