Title: carrier protein
Long Title: IUPAC Gold Book - carrier protein
DOI: 10.1351/goldbook.CT06814
Status: current

Definition
Protein to which a specific ligand or hapten is conjugated.Unlabeled protein introduced into an assay at relatively high concentrations which distributes in a fractionation process in the same manner as labeled protein analyte, present in very low concentrations.Protein added to prevent non-specific interaction of reagents with surfaces, sample components, and each other.Protein found in cell membranes, which facilitates transport of a ligand across the membrane.

Related Terms
- assay: https://goldbook.iupac.org/terms/view/A00470
- hapten: https://goldbook.iupac.org/terms/view/H02738
- membrane: https://goldbook.iupac.org/terms/view/MT06878

Source
- PAC, 2004, 76, 1033. 'Glossary of terms used in toxicokinetics (IUPAC Recommendations 2003)' on page 1043 (https://doi.org/10.1351/pac200476051033)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/CT06814/html
- json: https://goldbook.iupac.org/terms/view/CT06814/json
- xml: https://goldbook.iupac.org/terms/view/CT06814/xml

Citation: Citation: 'carrier protein' 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.CT06814
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: 2026-06-28T21:29:39+00:00