Chemicals and Drugs

Heterogeneous Nuclear RNA

Nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesized and degraded within the cell nucleus. Some heterogeneous nuclear RNA may be a precursor to mRNA. However, the great bulk of total hnRNA hybridizes with nuclear DNA rather than with mRNA.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesized and degraded within the cell nucleus. Some heterogeneous nuclear RNA may be a precursor to mRNA. However, the great bulk of total hnRNA hybridizes with nuclear DNA rather than with mRNA.

MeSH Record

Classification

Broader headings

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MeSH Record

Synonyms

3 entry terms
  • RNA, Heterogeneous Nuclear
  • hnRNA
  • Nuclear RNA, Heterogeneous

MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

79

MeSH Record

Previous Indexing

  • RNA (1966-1978)

MeSH Hierarchy

Tree Number

AMA Style

References

  1. National Library of Medicine. Heterogeneous Nuclear RNA. Medical Subject Headings (MeSH). 2026. Unique ID D012332. http://id.nlm.nih.gov/mesh/2026/D012332
  2. Heterogeneous Nuclear RNA. In: Wikidata. https://www.wikidata.org/wiki/Q78050066