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Related Experiment Videos

A modified method for the preparation of agarose.

M S Karve, N R Kale

    Preparative Biochemistry
    |January 1, 1977
    PubMed
    Summary

    This study presents a straightforward method to prepare high-quality agarose for electrophoresis. The new technique effectively removes impurities, yielding a neutral agarose ideal for precise molecular separations.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Materials Science

    Background:

    • Agarose is a crucial polysaccharide used in electrophoresis for separating nucleic acids and proteins.
    • Standard agarose preparations can contain anionic impurities that interfere with electrophoretic mobility.
    • Electroendosmosis, caused by charged groups in agarose, can negatively impact the accuracy of electrophoretic separations.

    Purpose of the Study:

    • To develop a simple and efficient method for preparing purified, neutral agarose suitable for electrophoresis.
    • To eliminate anionic polysaccharides and electroendosmosis from agarose.
    • To characterize the properties of the prepared agarose, including yield, purity, and gel-forming capabilities.

    Main Methods:

    • Extraction of agar gel-granules with a phosphate buffer containing urea.
    • Electrophoresis of the agar gel-granules in the same buffer system.
    • Alkali treatment in the presence of sodium borohydride to neutralize residual charges.

    Main Results:

    • The developed procedure yields 60-65% purified agarose.
    • The purified agarose has a low sulfur content (<0.1%).
    • The resulting agarose forms rigid, transparent gels and exhibits neutral properties, confirmed by the electrophoretic behavior of basic substances.

    Conclusions:

    • A simple and effective method for preparing neutral agarose for electrophoresis has been established.
    • The purified agarose demonstrates high quality, suitable for sensitive electrophoretic applications.
    • This method offers a reliable way to obtain consistent, high-performance agarose for molecular biology research.

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