Correction to: Nature Structural & Molecular Biology https://doi.org/10.1038/s41594-022-00746-2. Published online 28 March 2022.

In the version of this article initially published, in the ‘Library preparation’ subsection of Methods, the sentence beginning “For each binding experiment…” omitted 0.2 mg ml−1 of yeast tRNA from the recipe for high salt buffer. The error has been corrected in the HTML and PDF versions of the article.