Title: joining chain
Long Title: IUPAC Gold Book - joining chain
DOI: 10.1351/goldbook.13353
Status: current

Definition
Polypeptide that forms part of the polymeric structure of pentameric immunoglobulin M (IgM) and dimeric immunoglobulin A (IgA).

Related Terms
- immunoglobulin A (IgA): https://goldbook.iupac.org//terms/view/13286
- immunoglobulin M (IgM): https://goldbook.iupac.org//terms/view/13293

Source
- PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1197 (https://doi.org/10.1351/PAC-REC-11-06-03)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/13353/html
- json: https://goldbook.iupac.org/terms/view/13353/json
- xml: https://goldbook.iupac.org/terms/view/13353/xml

Citation: Citation: 'joining chain' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.13353
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-07-14T05:25:03+00:00