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Updated: Jul 18, 2026

High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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Restriction fragment length polymorphism of the human C3 complement gene.

S Dandieu1, G Lucotte

  • 1Laboratoire de Génétique Moléculaire du CNTS, Paris, France.

Experimental and Clinical Immunogenetics
|January 1, 1986
PubMed
Summary

Researchers identified a common DNA marker using a human complement (C3) gene probe. This restriction fragment length polymorphism (RFLP) is useful for tracking genetic links in myotonic dystrophy families.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Human Physiology

Background:

  • The human complement system plays a crucial role in immune response.
  • Genetic variations can influence complement component function and disease susceptibility.
  • Understanding genetic markers is vital for disease gene mapping and family studies.

Purpose of the Study:

  • To identify and characterize a restriction fragment length polymorphism (RFLP) for the human complement C3 gene.
  • To assess the frequency of this RFLP in the French population.
  • To evaluate the utility of this RFLP for genetic linkage analysis in families with myotonic dystrophy.

Main Methods:

  • Hybridization of a cloned gene-specific probe for human complement (C3) to DNA samples.
  • Digestion of DNA samples with restriction endonucleases, specifically Sac I.
  • Analysis of resulting DNA fragments to detect polymorphism.

Main Results:

  • A frequent restriction fragment length polymorphism (RFLP) was detected using the C3 gene probe with Sac I digestion.
  • The identified RFLP alleles are readily distinguishable.
  • The polymorphism was observed to be prevalent in the French population.

Conclusions:

  • The C3 gene RFLP identified is a valuable genetic marker.
  • This marker can be effectively used for linkage analysis of loci on chromosome 19.
  • The RFLP is suitable for tracing genetic inheritance patterns in families affected by myotonic dystrophy.