The nuclear envelope of both the macronucleus, seen here, and the micronucleus consists of 2 membranes containing numerous perforations called pores. Proteins are imported through these pores and ribo...

A particularly large accumulation of peroxisomes each surrounded by a single membrane and containing a few short tubules in an otherwise granular matrix. TEM taken on 8/9/65 by R. Allen with RCA EMU3F...

Electric shock causes massive trichocyst discharge and results in a large accumulation of HRP-labeled vesicles at the ectoplasmic/endoplasmic interface (at the level of the internal ends of the undisc...

A micrograph showing the polyploidal macronucleus of Tetrahymena containing many copies of the genome. Chromatin material is found as condensed electron opaque spots as well as in an uncondensed form...

A cross section of the cell (ventral side up) through the buccal cavity showing basal bodies of the 3 membranelles (1, 2 and 3) lying along the indented dorsal wall. A short segment of the oral ribs s...

EM images of chromatin fibers reconstituted from tandem arrays of a strong nucleosome positioning sequence flanked by 'linker' DNA, creating fibers containing 22 nucleosomes and a nucleosome repeat l...

High resolution image of early endosomes in which the membranes are easily seen as a tripartite track. Gold, labeling the C6 antigen, is observed only in the body of the early endosome and not in the ...

High resolution image of the macronucleus which contains microtubules that lie inside a seemingly intact nuclear envelope. Microtubules orient along the axis of macronuclear elongation in the form of ...

Longitudinal section through the buccal cavity of the oral region showing portions of 3 membranelles (1, 2 and 3): each membranelle consists of 3 rows of cilia. The oral ribs are seen on the right sid...

The undulating membrane is composed of two rows of basal bodies but only the outer row is ciliated. Both basal bodies are fully formed but only the ciliated member has an axosome and 9 + 2 axoneme. Th...