Correction to: Nature Structural & Molecular Biology https://doi.org/10.1038/s41594-025-01486-9, published online 11 February 2025.

In the version of the article initially published, the iMac II data (purple) in Fig. 3d were incorrect and have now been amended, as seen in Fig. 1. Additionally, the units shown for TT-Seq were “(0–292)” and have been corrected to “(0–400)”. The iMac I data (yellow) in Fig. 3d has been reformatted with thicker lines to promote visibility. These corrections have been made to the HTML and PDF versions of the article.

Fig. 1
figure 1

Original and corrected Fig. 3d.