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The bradford method for protein quantitation.

J B Hammond1, N J Kruger

  • 1Biochemistry Department, Rothamsted Experimental Station, Hertfordshire, UK.

Methods in Molecular Biology (Clifton, N.J.)
|March 15, 2011
PubMed
Summary
This summary is machine-generated.

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Accurate protein concentration estimation is vital for biological research. While the Lowry method is common, it suffers from interference, necessitating lengthy precipitation steps for reliable results.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Analytical Chemistry

Background:

  • Protein concentration determination is crucial across various scientific disciplines.
  • The Lowry method is a widely adopted technique for protein quantification.
  • Existing methods like the Lowry assay are prone to interference from common biological sample components.

Purpose of the Study:

  • To highlight the limitations of the Lowry protein assay.
  • To emphasize the need for accurate and rapid protein estimation methods.
  • To discuss the challenges posed by interfering substances in biological extracts.

Main Methods:

  • Review of established protein quantification techniques.
  • Analysis of the Lowry method's susceptibility to chemical interference.

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  • Consideration of sample preparation techniques to mitigate interference.

    • Main Results:

    • The Lowry method, despite its prevalence, is significantly affected by various compounds found in biological samples.
    • Trichloroacetic acid (TCA) precipitation can circumvent interference but adds considerable time to the assay.
    • The need for a protein assay that balances speed, accuracy, and minimal interference is evident.

    Conclusions:

    • Standard protein estimation methods require careful consideration of potential interfering agents.
    • Sample preparation protocols, such as TCA precipitation, are effective but impact assay efficiency.
    • Developing or selecting protein assays that are robust against common biological contaminants is essential for streamlined research.