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Related Experiment Videos

D1S1171: a new highly variable short tandem repeat polymorphism.

B Reichenpfader1, E P Leinzinger, M Klintschar

  • 1Department of Forensic Medicine, Karl-Franzens-Universität, Universitätsplatz 4, 8010 Graz, Austria. barbara.reichenpfader@uni-graz.at

International Journal of Legal Medicine
|July 12, 2002
PubMed
Summary

Forensic scientists evaluated the D1S1171 short tandem repeat (STR) locus in Austrians. This STR system demonstrates high discriminating power and heterozygosity, making it valuable for forensic DNA identification.

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Area of Science:

  • Forensic Genetics
  • Molecular Biology
  • Human Population Genetics

Background:

  • Short tandem repeat (STR) loci are crucial for forensic DNA profiling.
  • The D1S1171 locus has been investigated for its potential utility in human identification.

Purpose of the Study:

  • To evaluate the forensic suitability of the STR locus D1S1171 in an Austrian population.
  • To characterize the allelic variation and genetic parameters of D1S1171.

Main Methods:

  • Polymerase chain reaction (PCR) amplification of the D1S1171 locus.
  • Native polyacrylamide gel electrophoresis for allele separation.
  • Sequence analysis to determine repeat motif and allele designation.

Main Results:

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  • The D1S1171 locus was analyzed in 141 unrelated Austrian individuals.
  • No deviations from Hardy-Weinberg equilibrium were observed.
  • High observed heterozygosity (0.853) and discriminating power (0.951) were recorded.
  • A GAAA tetranucleotide repeat motif was identified, with alleles ranging from 9 to 18.

Conclusions:

  • The STR locus D1S1171 is a robust marker for forensic applications in the Austrian population.
  • Its high genetic diversity supports its use in DNA databases and identification systems.
  • The characterized allelic ladder facilitates accurate genotype determination.