In the upper panel, transmission electron microscopy reveals a tangled mass of ~30nm diameter nuclear chromatin fibers when the contents of the nucleus from erythrocytes of the newt Notophthalmus viri...

Image shows a z-series immuno-FISH of a mouse ES cell carrying a multi-copy alpha-globin BAC insertion: HP1 gamma immunostaining (blue) is shown relative to BAC FISH signal (red) versus combined lac o...

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...

Images of negatively stained chromatin fibers prepared from tandem arrays of a nucleosome positioning sequence reconstituted with purified histones. These samples contained 61 repeats of a 197 bp DNA ...

Transmission electron micrograph of unstained cryo-section of a sperm cell of the starfish Patiria miniata. Echinoderm sperm nuclei are unusual in that chromatin fibers are clearly seen, allowing the...

Transmission electron micrograph of unstained cryo-section of a sperm cell of the starfish Patiria miniata. Echinoderm sperm nuclei are unusual in that chromatin fibers are clearly seen, allowing the...

Phosphorus has a characteristic electron energy loss with an edge at 160 eV. The Zeiss 902 electron microscope permits images to be recorded at different energy losses which can be digitized and proce...

Transmission electron micrograph of isolated HeLa cell metaphase chromosome decondensed by removal of histones with dextran sulfate and heparin, centrifuged onto a carbon film and stained with uranyl ...

Transmission electron micrographs of whole metaphase chromosomes isolated from Chinese Hamster Ovary (CHO) cells showing the characteristic paired chromatids and centromeric constrictions.

Image shows a z-series of a mouse ES cell observed using 3D immuno-FISH. The ES cells carried a multi-copy insertion of an alpha-globin BAC. H3K9me3 immunostaining (red) is shown in comparison to vec...