Transmission electron micrographs of sections of tadpole oocyte show the potential for exchange between the nucleus and the cytoplasm at the nuclear envelope. Thin filaments that appear to traverse nu...

Transmission electron micrograph illustrating the unusually prominent fibrous nuclear lamina (arrows) seen in many invertebrates such as this leech ganglion cell. From Fawcett (1966) Am J. Anat. 119:...

Transmission electron micrograph of a thin section of the nucleus of a normal HeLa cell showing detail of a cross section of a nuclear pore - from a study of the role of the nuclear porin ALADIN. Oth...

Transmission electron micrograph of a thin section of the nucleus of a normal HeLa cell showing a tangential view of the nuclear envelope with nuclear pores. From a study of the role of the nuclear po...

Transmission electron micrograph of a thin section of the nucleus of a HeLa cell expressing a mutant of the nuclear porin ALADIN. The nuclear envelope ultrastructure is not affected by the mutation. ...

Early transmission electron micrographs showing pore details in negatively stained preparations of nuclear envelopes. Upper panel shows the pronounced 8-fold symmetry in the closely spaced pores of t...

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...

This Drosophila melanogaster early embryo (cycles 10-12) was injected with a fluorescent protein containing a nuclear localization signal (GFP-NLS). Proteins that contain a NLS are recognized by impor...

Transmission electron micrograph of section through the macronucleus of Nassula sp containing many darkly staining nucleoli.

Nuclear pores in face view of Opercularia coarctata. TEM taken on 6/13/69 by R. Allen with Philips 300 operating at 60kV. Neg. 14,800X. Bar = 0.25µm. A print of the negative was scanned and processed...