MeSH Browser

MeSH Heading: Cell Nucleolus
Tree Number(s): A11.284.430.106.279.345.175
Unique ID: D002466
RDF Unique Identifier: http://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)
Entry Term(s): Cell Nucleoli; Plasmosome
NLM Classification #: QU 350
See Also: Nucleolus Organizer Region
Public MeSH Note: 67
History Note: 67(65)
Date Established: 1967/01/01
Date of Entry: 1999/01/01
Revision Date: 2003/07/09

Allowable Qualifiers: chemistry (CH)

classification (CL)

drug effects (DE)

enzymology (EN)

genetics (GE)

immunology (IM)

metabolism (ME)

microbiology (MI)

parasitology (PS)

pathology (PA)

physiology (PH)

radiation effects (RE)

transplantation (TR)

ultrastructure (UL)

virology (VI)

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)
Terms: Cell Nucleolus Preferred Term
Term UI T007186
Date01/01/1999
LexicalTag NON
ThesaurusID NLM (1965); Cell Nucleoli
Term UI T007185
Date05/13/1994
LexicalTag NON
ThesaurusID NLM (1995); Plasmosome
Term UI T007187
Date03/29/1974
LexicalTag NON
ThesaurusID UNK (19XX)

Cell Nucleolus MeSH Descriptor Data 2025