Robuta

A freeze-fractured view of the nuclear envelope. The fracture in the middle of the figure exposes the cytosolic facing membrane. This can be distinguished by a...

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

A segment of the edge of the axoneme showing the outer axonemal dynein arms that extend from the A-subfiber of a doublet to bind to the B subfiber of the...

In the case of a developing organelle, once the vesicles have grown to 1-2?m in diameter an electron-opaque crystal begins to grow at the center of the...

Quick-freeze deep-etch image of a DV-III containing paracrystalline sheets in its lumen. The sheets have parallel rows of subunits spaced at 20nm...

Monoclonal antibody, E30-2-1, was raised to antigen D6 that specifically labels acidosomes and DV-II. There was no label on the nascent vacuole membrane or...

A relatively low magnification view of the anterior end of Paramecium showing the placement and size of trichocysts relative to the cortex and cytoplasmic...

High magnification view of the curved cytopharyngeal microtubular ribbons as they pass over the cytostomal cord. They carry the discoidal vesicles to their...

A high resolution micrograph showing four parasomal sacs in longitudinal section each at the base of a surface depression. Trichocysts extend into each lateral...

High resolution view of the quadrulus membranelle (4 rows of cilia) in the buccal cavity of Paramecium tetraurelia labelled for tubulin. Microtubules of the...

At the cytopharynx the acidosomes come in contact with the carrier vesicles that are derived from early endosomes. These carrier vesicles bind to the...

Receptor mediated endocytosis is a process in which extracellular molecules are taken into the cell via coated vesicles that pinch from the plasma membrane. In...

A high magnification view of the intimate docking of acidosomes with the phagosome is particularly apparent where the P-face of the acidosome lies against the...

Quick-freeze deep-etch of an ampulla. The P-fracture face has numerous IMPs. The microtubular ribbon now forms two bands next to this ampulla. The ribbons will...

Summary: In the course of developing methods to obtain dense populations of the ciliated protozoon Paramecium aurelia with undisturbed physiology and free from...

species of unicellular ciliate

Following discharge, remnant trichocyst membrane does not appear to directly enter the trans Golgi network for reuse in new trichocyst formation. Rather the...

Details of the origins of the cytopharyngeal ribbons and the quadrulus associated ribbons. At first view the cytopharyngeal ribbons look like they might arise...

High resolution image of immunogold labeled microtubules next to the cytoproct radiate from basal bodies and also from the tip of the cytoproct. These...

Striated bands in a transverse ridge (in which kinetodesmal fibers are lacking) at high magnification. The longer band has seven stripes rather than five as in...

P. multimicronucleatum in defecation. When a spent vacuole has fused with the single membrane along the midline of the ridge the lips of the cytoproct split...

Immunogold labeled thin frozen section of P. multimicronucleatum. Gold lies over the microtubules of the basal bodies and the doublets of the cilia. Also short...

In this image a portion of the true surface of the plasma membrane is exposed where the culture medium has been etched away. The IMPs of the plates can also be...

Conjugating cells come together during or following meiosis and exchange promicronuclei. The cells actually fuse together at ridge tips and openings are formed...

Cross sections of striated bands and infraciliary lattice arms. Filaments of the striated bands are less densely packed than the infraciliary lattice....

Detail of fractured early Digestion Vacuole-III membrane showing the many IMPs on the P-fracture faces of the lysosomal membranes that had just fused with the...

Detail of the junction between the ribbed wall and the right side of the cytopharynx area. The ribbed wall is covered by alveoli and the ribs are produced by...

Cross sections of a pair of basal bodies showing the triplet makeup of the 9 fibers; only one microtubular fiber is complete in each triplet while the other...

High resolution image of a longitudinal section through one of the radial arms of the contractile vacuole complex displaying two rows of openings from the...

A cell with a flat alveolar sac system. It is not clear why some cells have expanded alveoli and others have flattened alveoli. Cacodylate buffered fixative....

Acid phosphatase is synthesized in the biosynthetic pathway in the ER and packaged in the TGN into primary lysosomes which are passed on to secondary...

A high magnification view of the above septum in planar view and the septal pores that connect adjacent alveoli. The pores always lie next to the junction of...

Learn all about Paramecium, including its characteristics, classification, and more, to ace your NEET Biology. Understand its role in the ecosystem and its...

Cytochalasin B blocks DV release from cytopharynx. In this micrograph a very large nascent vacuole has been retained at the cytopharynx of this cell that had...

In this image a portion of the true surface of the plasma membrane is exposed where the culture medium has been etched away. The IMPs of the plates can also be...

A high resolution view of the radial arm of the Contractile Vacuole Complex or CVC each contain a collecting canal enclosed by a microtubular ribbon split...

This view shows a transverse ridge cut with its sloping side lying tangentially in the section plane. The granulo-fibrillar filled peaks are prominent....

Tangential fractures through mature trichocysts. The planes in the paracrystalline stacks are exposed. The body is laced to the membrane but such associations...

In quick-freeze deep-etch preparations the plasma membrane can be seen to contain plaques or plates of intramembrane particles (IMPs) that are regularly...

The infraciliary lattice in this quick-freeze deep-etched image consists of a meshwork of branching fibers composed of many subfibers. Basal bodies and...

Food vacuole of Didinium. The food vacuole contains both exploded and unexploded trichocysts of Paramecium. Further details available at Wessenberg, H. and...