Fig. 3.

In vivo M cell targeting by anti-Siglec-F antibody. Alexa647-labelled anti-Siglec-F (Black) or isotype control (Grey) antibody was injected into the small intestine of Balb/c mice. After 15 min of inoculation, PPs were harvested, and the cells were stained as in Fig. 2. Data are representative of two independent experiments with similar results.