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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
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Size-Exclusion Chromatography01:08

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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.
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The stability and compatibility of column material with samples are crucial for efficient purification in chromatographic techniques. Various operating parameters such as pH, temperature, or solvent affect the packing of the column material, thereby determining the purification efficiency. The choice of column material also plays an essential role in deciding the operating parameters and can be modified based on the proteins that need to be purified.
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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...
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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
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Related Experiment Video

Updated: May 4, 2026

Isolation and Characterization Of Chimeric Human Fc-expressing Proteins Using Protein A Membrane Adsorbers And A Streamlined Workflow
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Chitosan-based membrane chromatography for protein adsorption and separation.

Yezhuo Liu, Zhicheng Feng, Zhengzhong Shao

    Materials Science & Engineering. C, Materials for Biological Applications
    |December 25, 2013
    PubMed
    Summary

    A novel chitosan/carboxymethylchitosan (CS/CMCS) blend membrane chromatography effectively captures proteins like lysozyme. This bioseparation method shows high capacity, reusability, and potential for future applications in purifying biomolecules.

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    Area of Science:

    • Biomaterials Science
    • Separation Science
    • Chemical Engineering

    Background:

    • Chitosan-based materials are increasingly explored for bioseparation due to their biocompatibility and functional properties.
    • Developing efficient and reusable matrices for protein chromatography is crucial for downstream bioprocessing.
    • Natural polymers offer sustainable alternatives in chromatographic applications.

    Purpose of the Study:

    • To develop and characterize a chitosan/carboxymethylchitosan (CS/CMCS) blend membrane for chromatography.
    • To investigate the dynamic adsorption properties of the CS/CMCS membrane for protein separation.
    • To evaluate the performance, reusability, and application potential of the CS/CMCS membrane chromatography.

    Main Methods:

    • Fabrication of a CS/CMCS blend membrane matrix.
    • Dynamic adsorption studies using lysozyme as a model protein.
    • Optimization of parameters including pore size, flow rate, and feed concentration.
    • Separation of lysozyme and ovalbumin from a binary mixture.

    Main Results:

    • The CS/CMCS membrane chromatography demonstrated optimal dynamic adsorption capacity for lysozyme at 15.3 mg/mL.
    • The system exhibited good repeatability and reusability, with a desorption efficiency of approximately 90%.
    • Successful separation of lysozyme and ovalbumin from a binary mixture was achieved.

    Conclusions:

    • The CS/CMCS blend membrane is a promising matrix for protein chromatography.
    • This natural chitosan-based membrane chromatography offers high efficiency and reusability.
    • The developed system shows significant potential for applications in the bioseparation field.