RAB11A and infection: Confocal imaging revealed that the basolaterally internalized Tfn clustered at apical infection sites in a T3SS dependent manner and that the Tfn apical clusters partially co-localized with Rab11a (Fig 1A) and with the full-length (FL) GFP-Myo5b (Myo5b-FL) motor that moves Rab11a-positive vesicles along actin filaments (Fig 1B).