Cells as in (A) were incubated with or without 1 µg/ml dox overnight to induce Rab39a expression. 1x106 cells were fed at 4 beads/cell of biotinylated-Ova-magnetic-beads for 4 hours. Phagosomes were isolated and stained for Ova and Open H2-Ld. Representative of 3 independent experiments. 