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Related Concept Videos

Introduction to Actin01:26

Introduction to Actin

Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle cells, while in non-muscle cells, it is lower and makes up around 1–5 percent of the total cell protein. Actin found in the unicellular amoebae and complex multicellular animals is around 80% similar, demonstrating their conservation over a billion years of evolution.  Actin coding genes are conserved within species and across different species.

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Meat speciation by restriction fragment length polymorphism analysis using an α-actin cDNA probe.

K S Fairbrother1, A J Hopwood, A K Lockley

  • 1Division of Nutritional Biochemistry, School of Biological Sciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD UK.

Meat Science
|November 9, 2011
PubMed
Summary

This study introduces a new DNA fingerprinting method for meat speciation using an actin gene probe. This technique reliably identifies different animal species in meat products, even after heating.

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Area of Science:

  • Molecular Biology
  • Food Science
  • Genetics

Background:

  • Classical DNA fingerprinting uses repetitive sequences, unsuitable for species identification in meat.
  • Existing methods lack specificity for differentiating meat species.

Purpose of the Study:

  • To evaluate a conserved actin gene probe for accurate meat speciation.
  • To develop a reproducible method for identifying animal species in meat products.

Main Methods:

  • Genomic DNA extraction from muscle tissue.
  • Restriction digestion with BamHI and gel electrophoresis.
  • Hybridization with a murine α-actin cDNA probe.

Main Results:

  • Characteristic DNA fingerprints were generated for beef, pork, lamb, horse, chicken, and fish.
  • The method successfully discriminated between closely related species.
  • Identical patterns were observed for fresh and heated meat (120 °C).
  • No significant differences were found between breeds within a species.

Conclusions:

  • A single actin cDNA probe and conditions enable reliable meat speciation.
  • The method is robust, reproducible, and effective for identifying diverse meat species.
  • This approach offers a simple and effective tool for meat speciation and related biological applications.