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The anonymous PAS45 probe detects RFLPs in 13q31.
M S Gross1, A Sefiani, M F de Tand
1Unité de Recherches de Génétique Médicale, INSERM U-12, Hôpital des Enfants Malades, Paris, France.
Annales De Genetique
|January 1, 1989
Summary
A new DNA probe, PAS45, reveals a common chromosome rearrangement on chromosome 13q31 in the French population. This genetic marker, detected via restriction fragment length polymorphism (RFLP), shows codominant inheritance.
Area of Science:
- Human Genetics
- Molecular Biology
- Cytogenetics
Background:
- Restriction Fragment Length Polymorphism (RFLP) analysis is a key tool in genetic mapping.
- Chromosome rearrangements can impact gene function and disease susceptibility.
Purpose of the Study:
- To characterize a novel anonymous DNA probe, PAS45.
- To investigate the genetic basis and population frequency of a specific RFLP and associated chromosome rearrangement.
Main Methods:
- Isolation and characterization of the PAS45 DNA probe.
- RFLP analysis using multiple restriction enzymes (Bg1II, EcoRI, HindIII, PstI, MspI, XbaI).
- Somatic cell hybrid analysis and in situ hybridization for chromosome localization.
Main Results:
- The PAS45 probe detects a two-allele RFLP (alleles 1 and 2) with codominant inheritance.
- Allele frequencies in France: allele 1 (0.875) and allele 2 (0.125) in 48 individuals.
- PAS45 was localized to chromosome 13q31, indicating a rearrangement at this locus.
- The 13q31 rearrangement is present in approximately 25% of healthy French individuals.
Conclusions:
- The PAS45 probe is a valuable tool for studying RFLP and chromosome 13q31 rearrangements.
- The identified rearrangement is a common genetic feature in the French population.
- Further research is warranted to understand the functional implications of this common 13q31 rearrangement.