MATEdb2 is a repository of high-quality proteomes of animals made available to speed up phylogenomic studies. In the image, we depict this repository as a library, with books being the animal proteomes of the different animal phyla and outgroups. The stained glass window displays a simplified version of part of the animal tree of life, which we hope our database can help illuminate in future research https://doi.org/10.1093/gbe/evae235