At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

Transmission electron micrograph of a yeast cell exposed to 60µM antidepressant sertraline. This high-magnification zoom of CIL 39708 shows a double-membrane autophagosome. Encapsulated inside the a...

Cross fracture of cilia of the quadrulus. The basal body/cilium complexes are a little less tightly packed than in the peniculus. There are four or five rows of parasomal sacs interspersed with basal...

At cyst formation in the 'giant' unicellular green alga Acetabularia, each cyst contains a single nucleus which subsequently undergoes several rounds of mitosis prior to gamete formation. Initially t...

Vorticella convallaria fixed for EM and buffered in cacodylate. The rough ER is not vesiculated as it is in collidine buffered fixatives but appears as sheets from which Golgi dictyosomes arise. A foo...

Ancistrum is a marine ciliate that inhabits the mantle cavity of mytiliid mussels. This image shows a good view of mitochondria with tubular cristae and what are probably flask-shaped endosomes. This ...

Single tilt image of a 250 um thick section of a Drosophila S2 cell infected with flock house virus (FHV-1) imaged with intermediate voltage electron microscopy, taken at zero degree tilt. The dark sp...

Low magnification electron micrograph showing peroxisomes in several parenchymal cells in human liver, contrasted by catalase activity with DAB. A few organelles show a heterogeneous content: they are...

Transmission electron micrograph of ventricle tissue of a mouse cardiac muscle. This image shows the various areas of a muscle fiber. The Z lines are the very dark borders that link sarcomeres. Th...

Transmission electron micrograph of mitochondria from guinea pig pancreas. The use of osmium tetroxide as a fixative for electron microscopy was first described by Dr. Palade at the Rockefeller. Anot...