Correction to Nature Cell Biology https://doi.org/10.1038/s41556-019-0457-4, published online 3 February 2020

In the version of this article originally published, there was a typographical error in the legend for Fig. 8a. In “for-dual strand clusters, blue represents Walston strand mapping reads and red represents Crick strand mapping reads,” ‘Walston’ should be ‘Watson’. The error has been corrected in the HTML and PDF versions of the paper.