nucleoid


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nucleoid

[′nü·klē‚ȯid]
(cell and molecular biology)
A discrete region within mitochondria, chloroplasts, and prokaryotes that contain molecules of deoxyribonucleic acid.
(virology)
The ribonucleic acid (RNA) core that is enveloped by a protein capsid in RNA tumor viruses.
References in periodicals archive ?
Cross-strand binding of TFAM to a single mtDNA molecule forms the mitochondrial nucleoid.
Keywords: Escherichia coli, outer membrane, cytoplasmic membrane, periplasmic space, nucleoid, ribosomes, vesicles, aberrant mesosomes, betaine
humboldtianum, the frequency of these structures is high in the cytoplasm as compared with the bluefin tuna (Abascal and Medina, 2005) but similar to Fundulus (Selman and Wallace 1986) for both kind of vesicles with or without nucleoids but with fine granular materials inside.
Prokaryotic cells usually have a single, circular chromosome located in a part of the cytoplasm called the nucleoid (nuclear region).
To avoid the potential of a lethal effect from constitutive expression of an RNAi construct in Arabidopsis thaliana, a chemically inducible vector was utilized to study the effects of a gene knockout for the plastid nucleoid protein DCP68.
The nucleus of the eukaryotic cell is surrounded by a double membrane, but the prokaryotic cell has only a central body called a nucleoid, which is not surrounded by any membrane.
Paternal plastid inheritance in alfalfa: plastid nucleoid number within generative cells correlates poorly with plastid number and male plastid transmission strength.
The A type 'immature' particles about 87nm in diameter consisted of a ring-shaped nucleoid surrounded by a membrane and a submembranous electron-dense layer or shell.
Except for about 10 species of the global regulator and the bifunctional nucleoid proteins with both architectural and regulatory functions (see below), the levels of transcription factors are less than 100 molecules per cell under steady-state of cell growth under laboratory culture conditions.
On the contrary, histone-like nucleoid structuring protein (H-NS) encoded by the hns gene, a global prokaryotic gene regulator, has been shown to repress the transcription of several virulence genes including toxT, ctx and tcpA (38).
usually have a single, circular chromosome located in the nucleoid region of the cell.
EBV shares the classic structural features of the other herpes viruses: it is enveloped, contains a nucleoid and capsid, and has a linear double-stranded DNA genome, which is contained within the nucleoid structure.