Cell nucleus

membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated

discrete opening in the nuclear envelope of a eukaryotic cell

Nuclear DNA is the DNA inside the nucleus of eukaryotic cells.

class of nuclear body enriched in small nuclear ribonucleoproteins

A macronucleus (formerly also meganucleus) is the larger type of nucleus in ciliates. Macronuclei are polyploid and undergo direct division without mitosis. It controls the non-reproductive cell functions, such as metabolism. During conjugation, the macronucleus disintegrates, and a new one is formed by karyogamy of the micronuclei.

hypothesis that the eukaryotic cell nucleus evolved from a large DNA virus in a form of endosymbiosis within a methanogenic archaeon

protein found in the nucleus of a cell

frame|An overlay of a fluorescence micrograph (green) onto a DIC image of a HeLa cell expressing a Yellow fluorescent Protein fusion of Paraspeckle Protein 1 (PSP1): 1. cytoplasm; 2. nucleus; 3. nucleolus; 4. paraspeckles In cell biology, a paraspeckle is an irregularly shaped compartment of the cell, approximately 0.2-1 μm in size, found in the nucleus' interchromatin space. First documented in HeLa cells, where there are generally 10-30 per nucleus, Paraspeckles are now known to also exist in all human primary cells, transformed cell lines and tissue sections. Their name is derived from thei

extra-nucleolar nuclear domains, usually visualized by confocal microscopy and fluorescent antibodies to specific proteins