Microscopy on the DOX+ MUC1-ΔCT cells incubated with E. coli inv showed that cells expressing the MUC1-ΔCT were rarely infected with E. coli, whereas the subset of cells that lacked expression of MUC1-ΔCT showed a high percentage of infection (Fig. 3A and B). Here, MUC1 is linked to infection.