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Related Experiment Videos

Rapid protein purification using phenylbutylamine-Eupergit: a novel method for large-scale procedures.

V Kasche1, F Löffler, T Scholzen

  • 1AB Biotechnologie II, Technical University of Hamburg-Harburg, F.R.G.

Journal of Chromatography
|June 27, 1990
PubMed
Summary

Phenylbutylamine (PBA) derivatives were evaluated for protein binding in chromatography. PBA-Eupergit demonstrated the highest capacity, enabling efficient penicillin amidase purification without organic solvents.

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Area of Science:

  • Biochemistry
  • Chromatography
  • Protein Purification

Background:

  • Hydrophobic interaction chromatography (HIC) is a common technique for protein purification.
  • Developing adsorbents with high binding capacity and selective desorption is crucial for efficient HIC.

Purpose of the Study:

  • To compare the protein binding capacities of phenylbutylamine (PBA) derivatives of Eupergit C, agarose, and Phenyl-Sepharose for low-pressure chromatography.
  • To evaluate the purification of penicillin amidase using the most effective adsorbent.

Main Methods:

  • Electrophoretic desorption was employed to assess protein binding capacities of hydrophobic adsorbents.
  • Adsorption-desorption cycles were performed using PBA-Eupergit for penicillin amidase purification from E. coli homogenates.

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Main Results:

  • The bifunctional adsorbent PBA-Eupergit exhibited the highest protein binding capacity among the tested hydrophobic adsorbents.
  • Selective desorption of hydrophobically adsorbed proteins was achieved by decreasing eluent pH, utilizing electrostatic repulsion.
  • Penicillin amidase was purified with a yield greater than 90% and a purification factor of 5.3 in 50 cycles without organic solvents.

Conclusions:

  • PBA-Eupergit is a highly effective adsorbent for hydrophobic interaction chromatography, offering superior binding capacity.
  • The developed method allows for efficient and selective purification of enzymes like penicillin amidase without the need for organic solvents.