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Related Experiment Videos

Parentage testing using the serum protein plasminogen (PLG).

D D Dykes, M Mount, H F Polesky

    American Journal of Clinical Pathology
    |December 1, 1984
    PubMed
    Summary

    Plasminogen (PLG) isoelectric focusing identified six allotypes in a Minnesota population. This genetic marker system proved highly effective for excluding falsely accused fathers in paternity testing.

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    Area of Science:

    • Forensic Genetics
    • Population Genetics
    • Biochemistry

    Background:

    • Parentage testing relies on genetic markers to establish biological relationships.
    • Plasminogen (PLG) is a protein with known genetic variations (allotypes) that can be utilized in forensic and paternity analyses.
    • Previous studies have indicated the potential of PLG phenotyping in human identification.

    Purpose of the Study:

    • To evaluate the utility of isoelectric focusing for Plasminogen (PLG) phenotyping in a large population sample.
    • To determine the frequency of different PLG allotypes in a Minnesota Caucasian population.
    • To assess the effectiveness of PLG phenotyping as a genetic marker in routine parentage testing.

    Main Methods:

    • Isoelectric focusing (IEF) was employed to analyze Plasminogen (PLG) phenotypes.
    • A population study included 2,187 white individuals from Minnesota.
    • Paternity testing was conducted on 451 cases utilizing PLG phenotyping alongside other genetic markers.

    Main Results:

    • Six Plasminogen (PLG) allotypes were identified: PLG*1, PLG*2, PLG*3, PLG*B, PLG*D, and PLG*M.
    • Observed gene frequencies predicted a 0.2 probability of excluding falsely accused fathers.
    • The frequency of PLG exclusions in paternity cases aligned with expected values when used within a battery of 14-16 genetic markers.

    Conclusions:

    • Plasminogen (PLG) phenotyping is a valuable genetic marker system for parentage testing.
    • The observed PLG allotype frequencies support its use in paternity exclusion.
    • IEF of PLG provides a reliable method for enhancing the discriminatory power of genetic testing in legal and familial investigations.

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