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Related Concept Videos

Immunoprecipitation01:20

Immunoprecipitation

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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...
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Related Experiment Video

Updated: Mar 2, 2026

Multimer-PAGE: A Method for Capturing and Resolving Protein Complexes in Biological Samples
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Multimer-PAGE: A Method for Capturing and Resolving Protein Complexes in Biological Samples

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Multimer-PAGE: A Method for Capturing and Resolving Protein Complexes in Biological Samples.

Tyler Rhinesmith1, Bryan A Killinger2, Akhil Sharma3

  • 1Physiology, Michigan State University.

Journal of Visualized Experiments : Jove
|May 19, 2017
PubMed
Summary

This study presents a new method to stabilize and separate native protein complexes from tissue using cross-linking and two-dimensional gel electrophoresis. This technique allows for better investigation of crucial protein networks in cellular functions.

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Last Updated: Mar 2, 2026

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Proteomics

Background:

  • Investigating native protein complexes is challenging due to their non-covalent interactions.
  • Existing purification methods can disrupt these delicate complexes.
  • Understanding protein networks is vital for cellular function.

Purpose of the Study:

  • To develop a method for stabilizing and separating native protein complexes from unmodified tissue.
  • To enable the study of protein-protein interactions within their native cellular context.

Main Methods:

  • Utilizes two-dimensional polyacrylamide gel electrophoresis (2D-PAGE).
  • Employs blue-native PAGE for initial separation under non-denaturing conditions.
  • Applies dithiobis(succinimidyl propionate) (DSP) cross-linking to stabilize complexes.
  • Further separation via sodium dodecyl sulfate-PAGE (SDS-PAGE).

Main Results:

  • Successfully stabilized and separated various native protein complexes from tissue lysates.
  • The method is cost-effective and accessible to most molecular biology labs.
  • Demonstrated capture of well-studied protein complexes.

Conclusions:

  • The described method offers a viable approach to study native protein complexes.
  • It overcomes some limitations of traditional purification techniques.
  • Applicable to diverse biological systems for protein network analysis.