In the mouse uterus dataset of ~3700 cells from the Mouse Cell Atlas (Figure 2—figure supplement 16A), Ace2 was uniformly absent from all recovered populations (Figure 2—figure supplement 16B). Anpep is robustly detected in ~60% of glandular epithelial cells along with a smaller fraction (~10%) of stromal cells (Figure 2—figure supplement 16B). Dpp4 expression is detected in ~17% of dendritic cells (n = 23 of 131) along with ~5% of glandular epithelial cells, and Tmprss2 is expressed in a similarly small fraction of the epithelial population (Figure 2—figure supplement 16B).