nucleolus

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nucleolus

A Dictionary of Plant Sciences | 1998 | | © A Dictionary of Plant Sciences 1998, originally published by Oxford University Press 1998. (Hide copyright information) Copyright

nucleolus A clearly defined, often spherical area of the eukaryotic nucleus, composed of densely packed fibrils and granules. Its composition is similar to that of chromatin, except that it is very rich in RNA and protein. It is the site of the synthesis of ribosomal RNA, which forms a major part of ribosomes. The assembly of ribosomes starts in the nucleolus, but is completed in the cytoplasm.

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MICHAEL ALLABY. "nucleolus." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 8 Nov. 2009 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "nucleolus." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (November 8, 2009). http://www.encyclopedia.com/doc/1O7-nucleolus.html

MICHAEL ALLABY. "nucleolus." A Dictionary of Plant Sciences. 1998. Retrieved November 08, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-nucleolus.html

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nucleolus

A Dictionary of Nursing | 2008 | © A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

nucleolus (new-kli-oh-lŭs) n. (pl. nucleoli) a dense spherical structure within the cell nucleus that disappears during cell division. The nucleolus contains RNA for the synthesis of ribosomes.

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nucleolus

A Dictionary of Zoology | 1999 | | © A Dictionary of Zoology 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

nucleolus A clearly defined, often spherical area of the eukaryotic nucleus, composed of densely packed fibrils and granules. Its composition is similar to that of chromatin, except that it is very rich in RNA and protein. It is the site of origin of ribosomes.

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MICHAEL ALLABY. "nucleolus." A Dictionary of Zoology. 1999. Encyclopedia.com. 8 Nov. 2009 <http://www.encyclopedia.com>.

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MICHAEL ALLABY. "nucleolus." A Dictionary of Zoology. 1999. Retrieved November 08, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-nucleolus.html

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Positioning of the NOR-Bearing Chromosomes in Relation to Nucleoli in Daughter Cells after Mitosis
Magazine article from: Physiological Research; 5/1/2008; ; 700+ words ; ...clusters termed Nucleolus Organizer Regions...chromosomes) with nucleoli, as well as the...clusters termed Nucleolus Organizer Regions...Smetana 1970). Nucleoli disintegrate during...formation of a given nucleolus (Raska, 2003...and the number of nucleoli in the nucleus are...
Assembly of a functional nucleolus involves the Cajal (Coiled) body.
Newspaper article from: Genomics & Genetics Weekly; 3/7/2003; 615 words ; ...concerning the reassembly of a functional nucleolus remain scarce. "We have examined by...bodies in the building of a functional nucleolus," Zatsepina and coauthors concluded...step-wise assembly of a functional nucleolus in preimplantation mouse embryos involves...
Genetic Linkage Map of the Nucleolus Organizer Region in the Soybean
Magazine article from: Genetics; 1/1/2008; ; 700+ words ; ...ABSTRACT Simple polymorphisms in ribosomal DNA repeats in the nucleolus organizer region (NOR) permitted the development of markers...verified that the satellite region of chromosome 13 is the nucleolus organizer region (NOR) (Griffor et al. 1991). FISH resulted...
Arabidopsis Ribosomal Proteins RPL23aA and RPL23aB Are Differentially Targeted to the Nucleolus and Are Disparately Required for Normal Development1[C][W][OA]
Magazine article from: Plant Physiology; 5/1/2008; ; 700+ words ; ...C-terminal fluorescent-protein tag demonstrated that both isoforms accumulated in the nucleolus; however, only RPL23aA was targeted to the nucleolus with an N-terminal fluorescent protein tag, suggesting divergence in targeting efficiency...
Crossover Interference on Nucleolus Organizing Region-Bearing Chromosomes in Arabidopsis
Magazine article from: Genetics; 6/1/2005; ; 700+ words ; ...short arms (COPENHAVER et al. 1995; COPENHAVER and PIKAARD 1996). DNA encoding rRNA (rDNA) is commonly referred to as a nucleolus organizing region (NOR) because of the distinct suborganellar structure that forms around rRNA genes during interphase...
Ultrastructural and autoradiographic studies of the role of nucleolar vacuoles in soybean root meristem
Magazine article from: Folia Histochemica et Cytobiologica; 1/1/2004; ; 700+ words ; ...transport outside nucleolus. Key words: Nucleolus - Nucleolar vacuole...Autoradiography Introduction Nucleoli are visible in nucleus...nucleus, only one nucleolus is present [15...ultrastructure of nucleoli and nucleolar vacuoles...
The HIV Tat protein affects processing of ribosomal RNA precursor.(Research article)(human immunodeficiency virus)
Magazine article from: BMC Cell Biology; 6/17/2008; ; 700+ words ; ...multimerizes in the nucleolus and appears to play...fibrillarin in nurse cell nucleoli, causes death and delayed...with fibrillarin in the nucleolus of Drosophila cells...each contains several nucleoli. The images in Fig...nucleoplasm and in the nucleolus, where it colocalizes...
Research results from University of Paris update knowledge of cell biology.
Newspaper article from: Life Science Weekly; 7/29/2008; 700+ words ; ...exchanges within one nucleolus and between nucleoli within the nuclear...containing two nucleoli. The traffic...the neighbouring nucleolus is measured...the neighbouring nucleolus or the CB...the Cell (In nucleoli, the steady state...
Research on plant cell research detailed by S.H. Kim and co-authors.
Newspaper article from: Science Letter; 11/3/2009; 597 words ; "The eukaryotic nucleolus is multifunctional and involved in the metabolism and...thaliana exon junction complex proteins associate with the nucleolus, suggesting a role for the nucleolus in mRNA production," scientists writing in the journal...
Studies from University of Lodz have provided new data on immunofluorescence.
Newspaper article from: Biotech Week; 4/22/2009; 700+ words ; ...of circular domains in the nucleoli of each variant may indicate...transcriptional activity of the nucleoli, with the more metabolically...numbers of active areas in the nucleolus and higher levels of nucleolar...the ultrastructure of the nucleoli in all experimental variants...
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