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Updated: Jun 9, 2026
16:01
Immunoblot Analysis
Published on: June 20, 2008
Co-immunoprecipitation and protein blots.
Erika Isono1, Claus Schwechheimer
1Department of Plant Systems Biology, Technical University Munich-Weihenstephan, Munich, Germany.
Methods in Molecular Biology (Clifton, N.J.)
|August 25, 2010
Summary
Identifying protein interactions is key to understanding protein function. Co-immunoprecipitation and pull-down assays are effective methods for discovering and confirming these protein-protein interactions within cells.
Area of Science:
- Biochemistry
- Molecular Biology
- Cellular Biology
Background:
- Understanding protein function relies on identifying interacting partners.
- Protein-protein interactions are fundamental to cellular activities and biological processes.
Purpose of the Study:
- To describe co-immunoprecipitation and pull-down assays.
- To highlight their utility in identifying and characterizing protein-protein interactions.
Main Methods:
- Co-immunoprecipitation (Co-IP)
- Pull-down assays
Main Results:
- These methods are widely used for protein interaction studies.
- They enable the identification and characterization of protein complexes.
- Successful application requires a specific antibody or tagged protein.
Conclusions:
- Co-immunoprecipitation and pull-down are essential techniques in molecular biology.
- These methods facilitate the study of protein function through interaction analysis.
Related Concept Videos
01:20Immunoprecipitation
Immunoprecipitation, or IP, is a widely used technique that employs protein-antibody interactions to isolate proteins or protein complexes in their native state for studying protein-protein interactions, quaternary structures, or supramolecular complexes. Various modifications of the technique, including chromatin IP, cross-linking IP, and fluorescence IP, are commonly used.
Chromatin Immunoprecipitation
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Chromatin Immunoprecipitation
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Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
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02:36Chromatin Immunoprecipitation- ChIP
Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
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ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
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01:22Immunocytochemistry and Immunohistochemistry
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