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Estimation of avidin activity by two methods.

B Borza1, F Marcheş, R Repanovici

  • 1Faculty of Chemistry, University of Bucharest, Romania.

Revue Roumaine De Virologie (Bucharest, Romania : 1990)
|July 1, 1991
PubMed
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Two methods were used to estimate avidin biological activity. Spectrophotometry and radioisotopic determination yielded identical results, with spectrophotometry being more cost-effective and faster for avidin-biotin binding analysis.

Area of Science:

  • Biochemistry
  • Analytical Chemistry

Background:

  • Avidin is a protein with high affinity for biotin.
  • Accurate estimation of avidin's biological activity is crucial for various applications.

Purpose of the Study:

  • To compare the efficacy of two distinct methods for quantifying avidin's biological activity.
  • To determine the most convenient and cost-effective method for avidin-biotin binding assays.

Main Methods:

  • Spectrophotometric titration of avidin using biotin and 4-hydroxyazobenzen-2'-carboxylic acid as an indicator.
  • Radioisotopic determination involving titration with tritiated biotin.

Main Results:

  • Both spectrophotometric and radioisotopic methods produced comparable results for avidin activity.

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  • The spectrophotometric method demonstrated superior cost-effectiveness and speed compared to the radioisotopic approach.

    • Conclusions:

    • Spectrophotometric titration offers a practical and efficient alternative for estimating avidin biological activity.
    • This method is recommended for routine avidin-biotin binding studies due to its economic and temporal advantages.