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Descriptor English: Cell Nucleolus
Descriptor Spanish: Nucléolo Celular
Descriptor Portuguese: Nucléolo Celular
Descriptor French: Nucléole
Entry term(s): Cell Nucleoli
Nucleoli, Cell
Nucleolus, Cell
Plasmosome
Plasmosomes
Tree number(s): A11.284.430.106.279.345.175
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D002466
Scope note: 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 & Sainsbury, Dictionary of Microbiology & Molecular Biology, 2d ed)
Allowable Qualifiers: CH chemistry
CL classification
DE drug effects
EN enzymology
GE genetics
IM immunology
ME metabolism
MI microbiology
PA pathology
PH physiology
PS parasitology
RE radiation effects
TR transplantation
UL ultrastructure
VI virology
Public MeSH Note: 67
History Note: 67(65)
Related: Nucleolus Organizer Region MeSH
DeCS ID: 2501
Unique ID: D002466
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1967/01/01
Date of Entry: 1999/01/01
Revision Date: 2003/07/09
Cell Nucleolus - Preferred
Concept UI M0003766
Scope note 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 & Sainsbury, Dictionary of Microbiology & Molecular Biology, 2d ed)
Preferred term Cell Nucleolus
Entry term(s) Cell Nucleoli
Nucleoli, Cell
Nucleolus, Cell
Plasmosome
Plasmosomes



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