B4GALNT2 and infection: The difference in binding to organoid-derived monolayers from B4galnt2+/+ and B4galnt2−/− mice was much smaller when the cells were infected with the C. rodentium ∆fimA-H mutant compared to infection with the wild-type bacteria; therefore, we conclude that fimbriae-mannose binding plays an important role for C. rodentium binding to the B4galnt2−/− epithelium.