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

Single slice confocal images representing one optical slice of a cell stained for the Human Protein Atlas (HPA) antibody HPA040511 (shown in green). HPA040511 is a polyclonal Anti-C11orf54 antibody ...

High resolution image of the macronucleus of Coleps hirtus. Heterochromatin and nucleoli are seen as smaller and larger stained bodies, respectively, in the macronucleus. Many nuclear pores exist in t...

Nucleoli in a macronucleus of a cell undergoing micronuclear division. The nucleolus appears to have an organized surface layer composed of parallel threads of subunits. These may be developing riboso...

A high resolution image of the micronucleus and macronucleus of Opercularia coarctata. The nuclear envelope has numerous pores, at least as many per unit length as in the macronucleus. Some areas of t...

Transmission electron micrographs showing the unusual nucleolar structures in Sertoli cells of ruminants, with varying numbers of vesicles and tubules; the upper panel illustrates such an organization...

Shown is an image of a thin section showing the ultrastructure of the nucleus and nuclaer envelope in fibroblast from a Hutchinson-Gilford Progeria syndrome patient which carries a mutation in the gen...

Transmission electron micrograph of the salivary gland of the tick Rhipicelphals appendiculatus illustrating the dramatic difference in nuclear size seen in different cell types. Here, the large (prob...

Transmission electron micrograph of nucleus showing the characteristic features of glutaraldehyde fixation introduced as a primary fixative in 1962 and since used routinely. Chromatin appears differen...

Transmission electron micrograph illustrating the accumulation of dense heterochromation that accompanies terminal differentiation in may cells. Shown here is a section through a polychromatophilic er...