Nucleolus Organizer Region MeSH Descriptor Data 2025

MeSH Heading: Nucleolus Organizer Region
Tree Number(s): A11.284.430.106.279.345.190.160.650; G05.360.160.650; G05.360.340.024.380.875
Unique ID: D009697
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D009697
Scope Note: The chromosome region which is active in nucleolus formation and which functions in the synthesis of ribosomal RNA.
Entry Term(s): Nucleolar Organizer
NLM Classification #: QU 350
Previous Indexing: Cell Nucleolus (1966-1979); Chromosomes (1966-1979); Chromosomes, Human (1978-1979); specific human chromosome (1968-1979)
Public MeSH Note: 80
History Note: 80
Date Established: 1980/01/01
Date of Entry: 1979/05/25
Revision Date: 2009/07/06

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)

ultrastructure (UL)

virology (VI)

Cells [A11]
- Cellular Structures [A11.284]
  - Intracellular Space [A11.284.430]
    - Cell Nucleus [A11.284.430.106]
      - Cell Nucleus Structures [A11.284.430.106.279]
        
        Intranuclear Space [A11.284.430.106.279.345]
        
        Chromosomes [A11.284.430.106.279.345.190]
        
        Chromosome Structures [A11.284.430.106.279.345.190.160]
        
        Centromere [A11.284.430.106.279.345.190.160.165]
        
        Chromatids [A11.284.430.106.279.345.190.160.175]
        
        Chromatin [A11.284.430.106.279.345.190.160.180]
        
        Nucleolus Organizer Region [A11.284.430.106.279.345.190.160.650]
        
        Synaptonemal Complex [A11.284.430.106.279.345.190.160.830]
        
        Telomere [A11.284.430.106.279.345.190.160.845]

Genetic Phenomena [G05]
- Genetic Structures [G05.360]
  - Chromosome Structures [G05.360.160]

Genetic Phenomena [G05]
- Genetic Structures [G05.360]
  - Genome [G05.360.340]
    - Genome Components [G05.360.340.024]
      - Genetic Loci [G05.360.340.024.380]
        
        Achaete-Scute Complex Genome Region [G05.360.340.024.380.124]
        
        Locus Control Region [G05.360.340.024.380.249]
        
        Major Histocompatibility Complex [G05.360.340.024.380.500]
        
        Minor Histocompatibility Loci [G05.360.340.024.380.625]
        
        Minor Lymphocyte Stimulatory Loci [G05.360.340.024.380.750]
        
        Nucleolus Organizer Region [G05.360.340.024.380.875]
        
        Pseudoautosomal Regions [G05.360.340.024.380.906]
        
        Quantitative Trait Loci [G05.360.340.024.380.937]
        
        t-Complex Genome Region [G05.360.340.024.380.968]

Nucleolus Organizer Region Preferred

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