Fig. 5. After PtNSF gene silencing, docking of slender vesicles of similar appearance is seen on a food vacuole membrane in A and at alveolar sacs in B. The type of vesicles highlighted by arrows, only rarely seen on food vacuoles (fv), has never been observed previously on the inner membrane of alveolar sacs (as) to whose biogenesis it may contribute. er, endoplasmic reticulum; v, vesicle. Bars, 0.1 µm.