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Related Concept Videos

Immunoprecipitation01:20

Immunoprecipitation

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
Chromatin immunoprecipitation, also known as ChIP, is used to study protein-DNA or...
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
Antibody Actions01:26

Antibody Actions

Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Chromatin Immunoprecipitation- ChIP02:36

Chromatin 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.
Types of ChIP
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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Related Experiment Video

Updated: May 23, 2026

Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography
10:50

Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography

Published on: March 9, 2010

Immunoprecipitation: purifying the immune complexes.

Ed Harlow, David Lane

    CSH Protocols
    |April 10, 2012
    PubMed
    Summary
    This summary is machine-generated.

    This protocol details immunoprecipitation, a method to isolate specific proteins from cell lysates using antibodies and Protein A/G beads. Proper controls are essential for accurate results in protein complex analysis.

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    Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography
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    Immunoprecipitation with an Anti-Epitope Tag Affinity Gel to Study Protein-Protein Interactions
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    Immunoprecipitation with an Anti-Epitope Tag Affinity Gel to Study Protein-Protein Interactions

    Published on: January 5, 2024

    Area of Science:

    • Immunology
    • Molecular Biology
    • Biochemistry

    Background:

    • Immunoprecipitation is a widely used technique for isolating specific proteins.
    • Accurate protein isolation relies on effective antibody-antigen binding and removal of non-specific interactions.
    • Proper experimental controls are critical for validating immunoprecipitation results.

    Purpose of the Study:

    • To outline a standardized protocol for immunoprecipitation.
    • To emphasize the importance of appropriate controls in immunoprecipitation experiments.
    • To guide researchers in selecting suitable control antibodies and cell lines.

    Main Methods:

    • Formation of immune complexes by adding antibodies to cell lysates.
    • Utilizing Protein A or Protein G beads for capturing antibody-antigen complexes.
    • Washing steps to remove unbound proteins and ensure specificity.

    Main Results:

    • Successful isolation of target proteins through specific antibody binding.
    • Effective removal of non-specific proteins via washing and bead capture.
    • Demonstration of how appropriate controls validate the specificity of the immunoprecipitation.

    Conclusions:

    • This protocol provides a reliable method for protein immunoprecipitation.
    • The use of well-defined controls, such as pre-immune serum or specific hybridoma lines, is crucial for data integrity.
    • Adherence to these guidelines ensures the accuracy and reproducibility of immunoprecipitation assays.