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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Related Experiment Video

Updated: Jun 10, 2026

Infinium Assay for Large-scale SNP Genotyping Applications
13:33

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Published on: November 19, 2013

Microarray-based STR genotyping using RecA-mediated ligation.

David Herrmann1, Emily Rose, Uwe Müller

  • 1Gene Check Inc., Greeley, CO 80634 and UWILA International Consulting, Alachua, FL 32615, USA.

Nucleic Acids Research
|August 5, 2010
PubMed
Summary
This summary is machine-generated.

We developed a new assay for precise short tandem repeat (STR) allele length determination. This RecA-mediated ligation (RML) method offers high accuracy for human DNA genotyping in forensic and diagnostic applications.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Short tandem repeat (STR) genotyping is crucial for human identification.
  • Accurate determination of STR allele lengths is essential for reliable genetic analysis.
  • Existing methods may face challenges with the inherent difficulties of analyzing repetitive DNA sequences.

Purpose of the Study:

  • To introduce a novel assay for accurate STR allele length determination.
  • To leverage RecA-mediated ligation (RML) for enhanced STR genotyping fidelity.
  • To demonstrate the utility of RML in human DNA analysis for diagnostic and forensic purposes.

Main Methods:

  • Developed a RecA-mediated ligation (RML) assay.
  • Utilized RecA to facilitate homology searching and pairing of synthetic oligonucleotides with DNA targets (PCR amplicons).
  • Employed allele-specific ligation, requiring precise base pairing of adjacent oligonucleotides to the STR region without gaps or overlaps.

Main Results:

  • The RML assay accurately determines the length of short tandem repeat (STR) alleles.
  • RecA activity was essential for overcoming challenges in annealing repeated sequences in register.
  • The assay demonstrated capability for determining STR genotypes of human samples.

Conclusions:

  • The novel RML assay provides accurate STR genotyping.
  • The method is adaptable to high-throughput and automated systems.
  • This assay has significant potential for widespread application in diagnostic and forensic science.