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Generic high-capacity protein capture and release by pH control.

G Ferrand-Drake Del Castillo1, R L N Hailes, Z Adali-Kaya

  • 1Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden. adahlin@chalmers.se.

Chemical Communications (Cambridge, England)
|May 7, 2020
PubMed
Summary

Researchers developed a novel method for high-capacity protein immobilization using polyelectrolyte brushes and multivalent hydrogen bonds. Proteins can be fully released with preserved structure and activity by adjusting pH.

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Responsive Polyelectrolyte Brushes in Applications: Functions, Stimuli, and Design Considerations.

Advanced materials (Deerfield Beach, Fla.)·2025

Area of Science:

  • Biochemistry
  • Materials Science
  • Polymer Chemistry

Background:

  • Protein immobilization and release are crucial for various applications but technically demanding.
  • Developing efficient and gentle methods remains a significant challenge in biotechnology and materials science.

Purpose of the Study:

  • To introduce a new, high-capacity technique for protein immobilization within polyelectrolyte brushes.
  • To demonstrate the controlled release of proteins while maintaining their structural integrity and biological activity.

Main Methods:

  • Utilizing polyelectrolyte brushes functionalized with multivalent hydrogen bonds for protein capture.
  • Employing pH-triggered changes to induce protein desorption from the brush.

Main Results:

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  • Achieved high protein immobilization capacity, reaching several micrograms per square centimeter (μg cm⁻²).
  • Demonstrated complete protein release upon pH increase.
  • Confirmed that released proteins retain their original structure and biological activity.

Conclusions:

  • The developed method offers an effective strategy for high-capacity protein immobilization and controlled release.
  • This technique shows promise for applications requiring reversible protein attachment, such as biosensors and bioseparations.