ACE2, FDR-adjusted p = 7.32E−28; 28% express TMPRSS2, FDR-adjusted p = 2.15E−132; Table S6). We next explicitly gated cells by their TMPRSS2 and ACE2 expression, identifying a rare subset that co-expresses both, the majority of which fall within the “Secretory Cluster 7” cell type (Figures 4E and 4F) (30 cells, ∼0.