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Related Experiment Videos

Solid phase extraction of the zwitterionic detergent chaps.

S W Hall1, S R VandenBerg

  • 1Department of Pathology (Neuropathology), University of Virginia School of Medicine, Charlottesville 22908.

Preparative Biochemistry
|January 1, 1989
PubMed
Summary
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Solid phase adsorption effectively removes 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS) detergent from protein solutions. Techniques using Bio-Beads and Extracti-Gel significantly reduce CHAPS below critical micellar concentration.

Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Protein Chemistry

Background:

  • 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS) is a commonly used zwitterionic detergent in biochemical research.
  • Efficient removal of CHAPS is crucial for downstream protein analysis and purification.
  • Existing methods like dialysis and gel filtration can be time-consuming and less effective for dilute solutions.

Purpose of the Study:

  • To evaluate multiple solid phase adsorption techniques for CHAPS removal from protein solutions.
  • To compare the efficacy of different matrices, including Bio-Beads and Extracti-Gel, in reducing CHAPS concentrations.
  • To assess the impact of adsorption parameters on protein recovery.

Main Methods:

  • Evaluation of porous polystyrene divinylbenzene matrices (Bio-Beads) and Extracti-Gel D for CHAPS adsorption.

Related Experiment Videos

  • Quantification of CHAPS reduction to below critical micellar concentration and detectable limits.
  • Assessment of protein recovery percentages across different methods and conditions.
  • Comparison of batch versus chromatographic processing for optimal CHAPS removal.

    • Main Results:

    • Both Bio-Beads and Extracti-Gel significantly reduced CHAPS below its critical micellar concentration.
    • Extracti-Gel removed CHAPS to below detectable limits.
    • CHAPS adsorption by Bio-Beads correlated with bead surface area, with SM-16 beads achieving ~97% removal.
    • Protein recovery ranged from 56-95% with Bio-Beads and ~97% with Extracti-Gel.
    • Chromatographic processing yielded better recoveries than batch methods.

    Conclusions:

    • Solid phase adsorption is an effective method for removing CHAPS from dilute protein solutions.
    • This technique offers significant advantages over traditional dialysis and gel filtration.
    • Optimized solid phase adsorption protocols can achieve high detergent removal with good protein recovery.