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...

Fluorescence images showing the distribution of GFP-ALADIN, a WD-repeat protein that is mutated in the human triple A syndrome (green), and the nucleoporin Nup358(red)within the nuclear envelope of He...

Transmission electron micrographs. The upper panel shows a section through a frog nucleated erythrocyte. The nucleus is largely filled with heterochromatin which appears to have a fibro-granular stru...

High resolution image of the macronucleus which contains microtubules that lie inside a seemingly intact nuclear envelope. Microtubules orient along the axis of macronuclear elongation in the form of ...

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...

The macronucleus contains microtubules that lie inside a seemingly intact nuclear envelope. Microtubules orient along the axis of macronuclear elongation in the form of small bundles. The section is i...

An image of the nucleoli of the macronucleus. Nucleoli have a core of DNA that contains the genes that are transcribed into ribosomal RNA. Assembly of the ribosomal subunits from this processed RNA an...

Phosphorylated H2AX occurs preferentially in open chromatin. Wildtype mouse embryo fibroblasts were treated with the radiomimetic drug neocarzinostatin (NCS) for 1hour prior to being fixed and immunol...

During division the micronucleus contains internal microtubules as well as a layer of b-tubulin, not in microtubular form, on or just inside the nuclear envelope. The section is immunogold labeled wit...