Chemicals and Drugs

Immunoglobulin Fab Fragments

Univalent antigen-binding fragments composed of one entire IMMUNOGLOBULIN LIGHT CHAIN and the amino terminal end of one of the IMMUNOGLOBULIN HEAVY CHAINS from the hinge region, linked to each other by disulfide bonds. Fab contains the IMMUNOGLOBULIN VARIABLE REGIONS, which are part of the antigen-binding site, and the first IMMUNOGLOBULIN CONSTANT REGIONS. This fragment can be obtained by digestion of immunoglobulins with the proteolytic enzyme PAPAIN.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Univalent antigen-binding fragments composed of one entire IMMUNOGLOBULIN LIGHT CHAIN and the amino terminal end of one of the IMMUNOGLOBULIN HEAVY CHAINS from the hinge region, linked to each other by disulfide bonds. Fab contains the IMMUNOGLOBULIN VARIABLE REGIONS, which are part of the antigen-binding site, and the first IMMUNOGLOBULIN CONSTANT REGIONS. This fragment can be obtained by digestion of immunoglobulins with the proteolytic enzyme PAPAIN.

MeSH Record

Classification

Related Concepts

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

13 entry terms
  • Fab Fragment
  • Fab Fragments
  • Fab Immunoglobulin Fragments
  • Ig Fab Fragments
  • Immunoglobulin Fab Fragment
  • Immunoglobulins, Fab
  • Immunoglobulins, Fab Fragment
  • Fab Fragment Immunoglobulins
  • Fab Fragment, Immunoglobulin
  • Fab Fragments, Immunoglobulin
  • Fragment Immunoglobulins, Fab
  • Fragment, Fab
  • Immunoglobulin Fragments, Fab

MeSH Record

Aspects Covered

23 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, analysis, biosynthesis, blood, cerebrospinal fluid, chemistry, classification, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacology, physiology, poisoning, radiation effects, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

2006 (1973)

MeSH Record

Previous Indexing

  • Immunoglobulins (1970-1972)

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Immunoglobulin Fab Fragments. Medical Subject Headings (MeSH). 2026. Unique ID D007140. http://id.nlm.nih.gov/mesh/2026/D007140
  2. Immunoglobulin Fab Fragments. In: Wikipedia. https://en.wikipedia.org/wiki/Fragment_antigen-binding_region
  3. Immunoglobulin Fab Fragments. In: Wikidata. https://www.wikidata.org/wiki/Q909628