Cell Nucleolus
Within most types of eukaryotic CELL NUCLEUS, a distinct region, not delimited by a membrane, in which some species of rRNA (RNA, RIBOSOMAL) are synthesized and assembled into ribonucleoprotein subunits of ribosomes. In the nucleolus rRNA is transcribed from a nucleolar organizer, i.e., a group of tandemly repeated chromosomal genes which encode rRNA and which are transcribed by RNA polymerase I. (Singleton and Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
Year introduced: 1967(1965)
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Subheadings:
Tree Number(s): A11.284.430.106.279.345.175
MeSH Unique ID: D002466
Entry Terms:
- Cell Nucleoli
- Nucleoli, Cell
- Nucleolus, Cell
- Plasmosome
- Plasmosomes
See Also: