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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...
Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
Downstream Processing01:29

Downstream Processing

Downstream processing begins once fermentation is complete and involves a series of steps to recover and purify products such as acids, vitamins, antibiotics, or proteins.Cell HarvestingFor example, for intracellular protein-based products, the first step is harvesting the cells. This is typically achieved using centrifugation or filtration to separate the cells from the liquid phase.Cell Disruption for Intracellular ProductsIf the target product is intracellular, the harvested cells must be...

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Related Experiment Video

Updated: Jun 3, 2026

Affinity Purification of a 6X-His-Tagged Protein using a Fast Protein Liquid Chromatography System
07:19

Affinity Purification of a 6X-His-Tagged Protein using a Fast Protein Liquid Chromatography System

Published on: April 26, 2024

Protein purification.

J Conner1

  • 1Department of Biological Sciences, Institute of Virology, Glasgow Caledonian University, Glasgow, Scotland, UK.

Methods in Molecular Medicine
|March 5, 2011
PubMed
Summary
This summary is machine-generated.

Purifying proteins is crucial for understanding their function and structure. This process involves separating a target protein from complex mixtures using various biochemical techniques and verifying its identity throughout.

More Related Videos

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
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Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins
11:22

GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins

Published on: October 29, 2013

Related Experiment Videos

Last Updated: Jun 3, 2026

Affinity Purification of a 6X-His-Tagged Protein using a Fast Protein Liquid Chromatography System
07:19

Affinity Purification of a 6X-His-Tagged Protein using a Fast Protein Liquid Chromatography System

Published on: April 26, 2024

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
09:35

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins
11:22

GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins

Published on: October 29, 2013

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Science

Background:

  • Protein purification is fundamental for in-depth biological research.
  • Characterizing proteins requires isolating them from complex biological samples.
  • Purified proteins enable antibody generation, functional assays, and structural studies.

Purpose of the Study:

  • To outline the essential principles and methods for isolating individual proteins.
  • To highlight the importance of protein purification in biological research.
  • To describe techniques for identifying proteins during purification.

Main Methods:

  • Protein purification leverages differences in solubility, size, charge, hydrophobicity, and specific affinities.
  • Multiple separation techniques are combined for effective fractionation.
  • Identification methods include SDS-PAGE, Western blotting, and activity assays.

Main Results:

  • Successful isolation of a target protein from a heterogeneous mix is achievable.
  • Purified proteins can be reliably characterized for various downstream applications.
  • Methods exist to unambiguously distinguish the protein of interest at all stages.

Conclusions:

  • Protein purification is a critical prerequisite for comprehensive protein characterization.
  • A combination of separation and identification techniques ensures successful isolation.
  • Understanding protein properties is key to selecting appropriate purification strategies.