EPCAM and infection: As with Ad-CMV-GFP, Ad-CMV-Cre showed infection of a majority CD45+ (54%) cells and 39% EPCAM cells, but by contrast, ∼27% of the tomato+ cells in Ad-SPC-Cre-infected mice were EPCAM+, while only 37% were CD45+, with fewer cells expressing tomato overall (Figure 2B).