Early transmission electron micrograph showing an alpha cell in the Islet of Langerhans in the guinea pig pancreas. Alpha granules are prominent among the mitochondria, and a portion of nucleus is al...

Gallery of transmission electron micrographs of ribosomes purified from a rat liver homogenate by sucrose gradient centrifugation, and negatively stained with uranyl acetate. The gallery illustrates t...

Transmission electron micrograph of a negatively stained preparation of ribosomes isolated from a 3-day old chick embryo that was maintained in a cold room for 24 hrs. The ribosome crystals seen in ...

Transmission electron micrograph of a thin section through the bacterium Diplococcus pneumoniae. The fibrous nucleoid is centrally located, surrounded by cytoplasm containing numerous ribosomes.

Electron micrograph of a thin section through a portion of the chloroplast of the unicellular green alga Chlamydomonas. Free ribosomes are seen as dark particles within the chloroplast stroma. The ima...

Transmission electron micrograph of a mitochondria and a lipid droplet from a guinea pig pancreas. The use of osmium tetroxide as a fixative for electron microscopy was first described by Dr. Palade a...

Transmission electron micrograph of mitochondria and mitochondrial granules from guinea pig pancreas. The use of osmium tetroxide as a fixative for electron microscopy was first described by Dr. Palad...

Transmission electron micrograph showing capillary mouse myocardium continuous endothelium using a hemoglobin tracer in caveolae. Hemoglobin, used as a tracer, is seen in the lumen of a capillary lin...

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

Transmission electron micrograph of rat intestinal colon showing apical microvilli. Image made available by James D. Jamieson and the Department of Cell Biology, Yale University School of Medicine.