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Related Experiment Video

Updated: May 27, 2026

Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer

Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer

Published on: May 7, 2020

Technical note: A simplified procedure for myofibril hydrophobicity determination.

Ilham Chelh¹, Philippe Gatellier, Véronique Santé-Lhoutellier

¹Qualité des Produits Animaux, INRA, Centre de Theix, 63122 St Genès Champanelle, France.

|November 9, 2011

Summary

A new method accurately measures myofibril surface hydrophobicity using bromophenol blue (BPB) dye. This technique, validated by heating, quantifies protein changes relevant to food science and muscle biology.

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Area of Science:

Protein Biochemistry
Food Science
Muscle Biology

Background:

Surface hydrophobicity is a critical protein characteristic influencing functionality.
Quantifying myofibril hydrophobicity is essential for understanding muscle properties.
Existing methods for nonsolubilized proteins are often complex or unreliable.

Purpose of the Study:

To develop and validate a simple, reliable method for determining the surface hydrophobicity of nonsolubilized myofibrils.
To establish bromophenol blue (BPB) binding as an index of myofibrillar protein hydrophobicity.

Main Methods:

Developed a method utilizing the hydrophobic chromophore bromophenol blue (BPB).
Employed centrifugation to separate free and bound BPB.
Quantified bound BPB via absorption spectroscopy as an index of hydrophobicity.
Validated the method by heating myofibrils to induce controlled changes in hydrophobicity.

Main Results:

The developed method reliably determined myofibril surface hydrophobicity.
BPB fixation to myofibrils increased with heating time and temperature.
Results strongly correlate BPB binding with increased protein hydrophobicity upon heating.

Conclusions:

The BPB-based method is a simple and validated approach for assessing myofibril surface hydrophobicity.
This technique provides a valuable tool for studying protein alterations in muscle foods.
The method's sensitivity to thermal treatment highlights its utility in food processing research.