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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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Updated: Mar 17, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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A Multi-Domain Affinity Metal Organic Polymer-MXene Heterostructure for Superior Advanced Antibody Separation.

Haoran Wang1, Lan Liu1, Tianbao Li1

  • 1College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.

Analytical Chemistry
|March 16, 2026
PubMed
Summary

A novel FePMX material efficiently separates immunoglobulin G (IgG) antibodies using a hierarchical heterostructure. This advancement offers high selectivity and capacity for antibody purification in bioanalytics and pharmaceutical research.

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Area of Science:

  • Materials Science
  • Biochemistry
  • Analytical Chemistry

Background:

  • Accurate antibody protein acquisition is crucial for clinical therapy and biomedical applications.
  • Current antibody separation methods face challenges in specificity and efficiency.

Purpose of the Study:

  • To engineer a hierarchical heterostructure framework for enhanced antibody separation.
  • To investigate the affinity and selectivity of the novel material for IgG antibodies.

Main Methods:

  • Fabrication of a polyhedral oligomeric silsesquioxane (POSS)-based metal-organic polymer on MXene (FePMX).
  • Characterization of the FePMX heterostructure and its surface functionalities.
  • Evaluation of IgG binding affinity, selectivity, and separation efficiency.

Main Results:

  • FePMX demonstrated significantly enhanced recognition specificity and adsorption selectivity for IgG.
  • High affinity was confirmed with a dissociation constant (Kd) of 5.08 × 10^-7 M.
  • Achieved a selective enrichment factor of 193.75 and uptake capacity of 1784.2 mg g^-1, yielding ~95.4% protein purity.

Conclusions:

  • The engineered FePMX provides a reliable approach for specific antibody purification.
  • Multidomain affinity carriers show remarkable potential in bioanalytics and pharmaceutical research.