Tag Archive for 'Cell nucleus'

Asgard archaeon. Scale bar - 500 nm. Image credit: Imachi et al., doi: 10.1038/s41586-019-1916-6.

Human Enzyme Evolved from Ancient Single-Celled Organisms, Study Suggests

Nov 7, 2022 by Sergio Prostak

AK6, an enzyme found in the nucleus of human cells, contains clear traces of single-celled organisms called Asgard archaea, according to new research led...

Photograph and line drawing of the Caudipteryx specimen. Image credit: Zheng et al., doi: 10.1038/s42003-021-02627-8.

Paleontologists Find Chromatin Threads in Fossilized Dinosaur Cartilage

Sep 27, 2021 by Enrico de Lazaro

Paleontologists have analyzed cartilage material from Caudipteryx, an oviraptorosaurid dinosaur that lived in what in now China some 125 million years...

Left: a 3D illustration of the nucleus representing the classical theory of DNA organization at its center. Right: microscopic image of the nucleus of a fruit fly larva’s muscle cell; the long chains of DNA (red) are attached to the nuclear lamina (green) -- the inner layer of the nuclear membrane. Image credit: Weizmann Institute of Science.

New Images Reveal 3D Chromatin Organization in Live Cell Nuclei

Sep 10, 2021 by News Staff

Chromatin is a substance within a chromosome consisting of DNA and protein. The major proteins in chromatin are histones, which help package the DNA in...

Yamagata et al succeeded in observing the signs of the biological activity of 28,140-year-old mammoth nuclei in mouse oocytes. In this image, proteins that form chromosomes (red) and proteins that form dividing spindles (green) gather around a mammoth cell nucleus (upper right) in the mouse oocyte. Image credit: Yamagata et al, doi: 10.1038/s41598-019-40546-1.

Researchers ‘Revive’ Woolly Mammoth Cell Nuclei

Mar 14, 2019 by Enrico de Lazaro

In 2010, the 28,140-year-old partial carcass of a woolly mammoth (Mammuthus primigenius), nicknamed ‘Yuka,’ was found in Siberian permafrost. Now a...

Human cell nuclei with fluorescently labeled chromatin (purple) and nuclear envelope (green). Image credit: Fang-Yi Chu & Alexandra Zidovska, New York University.

Live Human Cells Have Their Own ‘Internal Clocks’

Sep 13, 2017 by News Staff

A team of researchers at New York University has found that the nucleus of a human cell exhibits subtle, but measurable, fast shape fluctuations, and that...