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Related Concept Videos

Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Related Experiment Video

Updated: Apr 26, 2026

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing
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[AS-PCR assay for 20 mtDNA SNP typing and haplotype frequency].

Yan-Chai Nie, Chen Zhang, Ya-Nan Liu

    Fa Yi Xue Za Zhi
    |July 31, 2014
    PubMed
    Summary

    A new multiplex allele-specific PCR (AS-PCR) assay enables efficient mitochondrial DNA (mtDNA) SNP typing using three-color fluorescence. This method is accurate and sensitive, with potential applications in forensic science.

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    Area of Science:

    • Molecular Biology
    • Genetics

    Background:

    • Mitochondrial DNA (mtDNA) single nucleotide polymorphisms (SNPs) are valuable genetic markers.
    • Accurate and efficient mtDNA SNP typing methods are crucial for various applications, including forensics.

    Purpose of the Study:

    • To develop a multiplex allele-specific PCR (AS-PCR) assay for simultaneous typing of multiple mtDNA SNPs.
    • To employ three-color fluorescence labeling for enhanced detection and differentiation of SNP alleles.

    Main Methods:

    • Design of allele-specific primer sets for 20 mtDNA SNPs in the coding region.
    • Utilized multiplex AS-PCR with FAM and HEX fluorescence labeling.
    • Analysis of 200 blood samples using AS-PCR and capillary electrophoresis, with verification by direct sequencing.

    Main Results:

    • Successful generation of distinct electropherograms for all 200 samples.
    • AS-PCR typing results showed complete concordance with direct sequencing.
    • Demonstrated high sensitivity with a minimum detectable DNA concentration of 0.2 pg.
    • Identified 15 distinct haplotypes with a haplotype diversity of 0.906.

    Conclusions:

    • Multiplex AS-PCR is a simple, rapid, and efficient method for mtDNA SNP typing.
    • The developed assay is highly sensitive and accurate.
    • This method holds significant potential for application in forensic investigations.