Correction to: Nature Methods https://doi.org/10.1038/s41592-020-0915-8, published online 22 July 2020.

In the version of this article initially published, the text gave the impression the Institute for Protein Innovation (IPI) is affiliated with Harvard Institutes of Medicine (HIM). IPI is not an HIM institute; it is an independent organization in the HIM building. The error has been corrected in the PDF and HTML versions of the article.