Cells taken from stationary phase cultures often have larger lysosomes which contain additional paracrystalline layers. These lysosomes may be on their way to becoming the crystals which appear in lar...

A DV-III contains a thick continuous glycocalyx (polysaccharide coat) on the luminal side of its membrane as well as paracrystalline material, both provided by the fused lysosomes. The latex beads ind...

11 micrographs are views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 3 food vacuoles (of a total of about 15 in the cell...

The collapsed cytopharyngeal membrane extends from the open cytopharynx into the cytosol. This membrane is associated with many docked acidosomes, vesicles that contain V-type proton translocating ATP...

A nascent digestive vacuole with several acidosome-like vesicles docked at its cytosolic surface. The presence of the microtubules from the oral ribs signifies that this vacuole is still attached to t...

Higher magnification of a QF-DE image of an acidosome with a large inward indentation of its membrane. The fractured P-face of the indentation shows many large IMPs. The acidosome lumen is honeycombed...

In more extreme cases microfilamentous material builds up into a thick layer surrounding the DV-I membrane as well as the fusion sites between the acidosomes and the DV-I. A similar thick meshwork was...

Secondary lysosomes dock only with phagoacidosome membrane at a distance of 40nm. As during acidosome fusion with phagosomes, fusion of the many lysosomes with the phagoacidosome occurs at nearly the ...

Phagoacidosomes are heavily labeled for L1 antigen in 5-8 to 15-18 minute-old DVs. However, only some DVs at 15-18 min still had L1 label. Only occasionally did we see tubules with label arising from ...

11 micrographs of views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 4 food vacuoles. The helically contracted stalk is se...