Correction to: Nature Structural & Molecular Biology https://doi.org/10.1038/s41594-023-01065-w, published online 21 August 2023.

In the version of the article originally published, the y axis in Fig. 4d, now reading “Normalized intensity” and “Normalized 3D length”, incorrectly included the units “(a.u.)” and “(μm)”. This has been corrected in the HTML and PDF versions of the article.