Mouse 3T3 fibroblast stained for the nucleolar protein nucleostemin (left, green) and 28S rRNA (right, red).

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...

Single image from a serial section electron microscopic reconstruction of the cell body of a cortical pyramidal neuron from a biopsy sample obtained from the cortex of a patient with Alzheimer's dise...

Single slice confocal images representing one optical slice of a cell stained for the Human Protein Atlas (HPA) antibody HPA038237 (shown in green). HPA038237 is a polyclonal Anti-TCOF1 antibody that...

Single image from a serial section electron microscopic reconstruction of the cell body of a cortical pyramidal neuron from a biopsy sample obtained from the cortex of a patient with Alzheimer's dise...

Transmission electron micrograph of a thin section of the nucleus of a normal HeLa cell - from a study of the role of the nuclear porin ALADIN. Other images in this group show details of nuclear pore...

The DNA replication band in macronucleus of Halteria. Like hypotrichs the macronucleus of this oligotrich has a DNA replication band where DNA is synthesized. The nucleolus is evident. TEM taken on 3/...

Transmission electron micrographs showing the unusual configuration of nucleoli in Sertoli cells, with smaller, highly dense spherical bodies flanking a large central body. Upper micrograph from guin...

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...