Single microtubules extend into the cytoplasm from the tips of the cytoproct ridge. These are thought to come to lie along the surface of the approaching DV-IV and to pull the ridge down against the D...

Sections show the origin of one cytopharyngeal ribbon of 12 microtubules from the nodes and show the tight curve the ribbon follows over the cytostomal cord. These ribbons move discoidal vesicles, aci...

Higher magnification of acidosomes docked at the nascent digestive vacuole membrane. The E-fracture face is relatively IMP free while the P-fracture face has many large IMPs as well as some sizable pi...

The nascent phagosome membrane has a dense coat of acidosomes docked at its cytosolic surface well before the nascent vacuole pinches off the cytopharynx. This micrograph is a quick-freeze deep-etch i...

By 5-8 minutes the membrane of the DV uniformly labels with the mAb to the L1 antigen that is specific for acidosomes and phagoacidosome (DV-II) membrane. An unlabeled lysosome lies next to the DV-II....

Transission electron micrograph of a typical lipid droplet. In places the encapsulating phospholipid monolayer is evident. This image was taken in a sertraline-treated swa2 mutant yeast cell. (31,500X...

Cultured retinal pigment epithelial cells immunofluorescently labeled for adaptor protein-2 (AP2) (green) and nucleus (blue). The cells were fixed in 2% PFA and 0.5% Triton X-100 for 2 minutes follow...

Grazing section through an accumulation of uncoated cupulas in the process of attachment to and fusion with a food vacuole membrane. The small round pores apparently represent early stages of fusion o...

Transmission electron micrograph of exocytosis taken from the rat pancreas. Images such as these indicated that secretory granules closely and selectively approach the apical membrane of the pancreat...

A clump of at least seven small clathrin cages that are probably connected to an early endosome (below the fracture plane). The morphology of these cages shows a tighter packing than the larger clathr...