Title: Fv fragment
Long Title: IUPAC Gold Book - Fv fragment
DOI: 10.1351/goldbook.13142
Status: current

Definition
Variable (V) region fragment of an antibody heavy chain or light chain.

Related Terms
- Variable (V) region: https://goldbook.iupac.org//terms/view/13773
- heavy chain: https://goldbook.iupac.org//terms/view/13198
- light chain: https://goldbook.iupac.org//terms/view/13386

Source
- PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1165 (https://doi.org/10.1351/PAC-REC-11-06-03)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/13142/html
- json: https://goldbook.iupac.org/terms/view/13142/json
- xml: https://goldbook.iupac.org/terms/view/13142/xml

Citation: Citation: 'Fv fragment' 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.13142
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.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
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: 2026-08-03T12:12:54+00:00