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Related Concept Videos

Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...

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Related Experiment Video

Updated: Jun 10, 2026

An Economical and Versatile High-Throughput Protein Purification System Using a Multi-Column Plate Adapter
10:08

An Economical and Versatile High-Throughput Protein Purification System Using a Multi-Column Plate Adapter

Published on: May 21, 2021

Screening optimized protein purification protocols by coupling small-scale expression and mini-size exclusion

Elisa Sala1, Ario de Marco

  • 1COGENTECH, IFOM-IEO Campus for Oncogenomics, Milano, Italy.

Protein Expression and Purification
|August 6, 2010
PubMed
Summary

Small-scale screening using mini size exclusion chromatography (SEC) columns efficiently optimizes protein purification protocols. This method quickly analyzes protein aggregation and contaminants, improving large-scale production.

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Protein Digestion, Ultrafiltration, and Size Exclusion Chromatography to Optimize the Isolation of Exosomes from Human Blood Plasma and Serum
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High-Throughput Expression and Purification of Human Solute Carriers for Structural and Biochemical Studies

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Area of Science:

  • Biochemistry
  • Protein Chemistry
  • Chromatography

Background:

  • Optimizing protein production requires efficient screening of purification conditions.
  • Traditional methods can be time-consuming and require larger sample volumes.

Purpose of the Study:

  • To evaluate a novel mini column-based size exclusion chromatography (SEC) method for small-scale protein purification screening.
  • To assess the utility of SEC in conjunction with affinity purification for aggregation analysis.

Main Methods:

  • Utilized mini columns for size exclusion chromatography (SEC).
  • Coupled SEC with magnetic bead-based affinity purification.
  • Analyzed protein aggregation and contaminants using gel filtration.

Main Results:

  • Only 35 μL of eluate is needed for parallel affinity purification and SEC.
  • Each SEC cycle, including washing and equilibration, takes approximately 30 minutes.
  • SEC effectively estimates soluble aggregates and identifies low molecular mass contaminants missed by SDS-PAGE.

Conclusions:

  • Mini SEC columns offer a rapid and efficient approach for optimizing protein purification protocols.
  • This method enhances the analysis of protein aggregation and purity in small-scale screening.
  • SEC complements SDS-PAGE by revealing soluble aggregates and low molecular weight impurities.