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Related Concept Videos

Protein Complex Assembly02:41

Protein Complex Assembly

16.7K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
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Protein Complex Assembly02:41

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No description available
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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Affinity and Avidity01:41

Affinity and Avidity

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Overview
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Electron Affinity03:07

Electron Affinity

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The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
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Related Experiment Video

Updated: Jan 27, 2026

Affinity Purification of Chloroplast Translocon Protein Complexes Using the TAP Tag
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Affinity Purification of Chloroplast Translocon Protein Complexes Using the TAP Tag

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Affinity purification of protein complexes.

Ileana M Cristea, Brian T Chait

    Cold Spring Harbor Protocols
    |May 4, 2011
    PubMed
    Summary
    This summary is machine-generated.

    This study details a method for isolating protein complexes using magnetic beads and antibodies. This technique allows for rapid and efficient purification, aiding in the understanding of protein complex functions.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Cell Biology

    Background:

    • Understanding protein complex composition is crucial for elucidating cellular functions.
    • Immunoaffinity purification is a key technique for isolating and analyzing protein complexes.
    • Antibodies targeting specific proteins or tags enable targeted immunoisolation.

    Purpose of the Study:

    • To describe a protocol for the rapid and efficient purification of protein complexes.
    • To utilize immunoaffinity purification with magnetic beads for isolating protein complexes from biological samples.

    Main Methods:

    • Employing immunoaffinity purification using magnetic beads conjugated with antibodies.
    • Targeting specific proteins or protein tags for selective capture of protein complexes.
    • Applying the protocol to isolate protein complexes from cellular or tissue extracts.

    Main Results:

    • Demonstrated the rapid and efficient isolation of protein complexes.
    • Successfully purified target protein complexes from complex biological mixtures.
    • Validated the use of antibody-conjugated magnetic beads for immunoisolation.

    Conclusions:

    • The described protocol offers a robust method for protein complex purification.
    • This technique facilitates the study of protein complex composition and function.
    • Immunoaffinity purification on magnetic beads is an effective strategy for proteomic analysis.