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A micromethod for protein assay using a light microscope
T Matsuzawa1, M Takekoshi, J Aikawa
1Laboratory of Biology, Obihiro University of Agriculture, Hokkaido, Japan.
The Journal of Veterinary Medical Science
|November 20, 1998
Summary
A new micromethod accurately measures small protein amounts using a simple protein-dye reaction and microscopy. This technique is ideal for limited biological samples, offering precise quantification.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Microscopy
Background:
- Accurate protein quantification is crucial in biological research.
- Limited sample volumes often pose challenges for traditional protein assays.
- Development of sensitive microscale methods is needed for analyzing scarce biological materials.
Purpose of the Study:
- To develop a novel micromethod for quantifying small protein quantities.
- To utilize a protein-dye binding reaction for sensitive protein measurement.
- To adapt light microscopy for precise analysis of micro-volumes of protein samples.
Main Methods:
- A micromethod employing cellulose acetate membranes (2.0 mm diameter) for protein absorption (0.5 microliter).
- Staining of protein-bound membranes with Coomassie Brilliant Blue G-250.
- Examination of stained membranes using a light microscope equipped with an automatic exposure instrument.
Main Results:
- The method successfully quantifies protein amounts ranging from 0.2-2.0 micrograms.
- A linear relationship was established between dye-binding intensity and protein concentration.
- The automatic exposure instrument ensured consistent and reproducible measurements.
Conclusions:
- The developed micromethod provides a sensitive and accurate approach for protein quantification from limited biological samples.
- This technique offers a valuable tool for researchers working with microscale biological materials.
- The protein-dye binding assay combined with automated microscopy is effective for micro-volume protein analysis.