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Related Experiment Videos

Recombinant barnase as a label in ELISA

S A Yazynin1, S M Deyev

  • 1Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, Moscow, Russian Federation.

FEBS Letters
|June 17, 1996
PubMed
Summary

Recombinant barnase, an enzyme, was used as a novel label in enzyme-linked immunosorbent assays (ELISA). This method successfully detected pig transferrin with high sensitivity, enabling free transferrin determination.

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Area of Science:

  • Biochemistry
  • Immunology
  • Enzyme Assays

Background:

  • Enzyme-linked immunosorbent assay (ELISA) is a widely used immunoassay technique.
  • Recombinant barnase offers potential as a sensitive enzymatic label.
  • Accurate quantification of proteins like transferrin is crucial in diagnostics.

Purpose of the Study:

  • To develop and validate a novel ELISA method using recombinant barnase as a label.
  • To assess the sensitivity and applicability of the barnase-conjugate in detecting pig transferrin.

Main Methods:

  • Preparation of barnase-conjugated pig transferrin via periodate oxidation.
  • Quantification of solid-phase bound barnase activity by monitoring RNA-ethidium bromide complex fluorescence changes.
  • Application of the conjugate in a competition ELISA for free transferrin determination.

Main Results:

  • The transferrin-barnase conjugate demonstrated high sensitivity in ELISA, with detection limits as low as 5 ng per well.
  • The developed method was successfully applied to determine free transferrin levels.

Conclusions:

  • Recombinant barnase is a viable and sensitive label for ELISA.
  • The barnase-based ELISA offers a sensitive approach for quantifying transferrin and related analytes.

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