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Human lymphocyte polymorphisms detected by quantitative two-dimensional electrophoresis.

D Goldman, C R Merril

    American Journal of Human Genetics
    |September 1, 1983
    PubMed
    Summary

    Researchers identified genetic polymorphism in 19 soluble lymphocyte proteins using two-dimensional electrophoresis. This discovery offers new genetic markers for human genome studies and gene mapping.

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    Area of Science:

    • Human Genetics
    • Molecular Biology
    • Immunology

    Background:

    • Genetic polymorphism in human proteins is crucial for understanding genetic diversity.
    • Previous studies using one-dimensional electrophoresis have estimated polymorphism rates, but limitations exist.

    Purpose of the Study:

    • To survey soluble lymphocyte proteins for genetic polymorphism using advanced electrophoresis techniques.
    • To characterize the genetic basis and inheritance patterns of observed protein variants.

    Main Methods:

    • Two-dimensional electrophoresis of 14C-labeled phytohemagglutinin (PHA)-stimulated human lymphocyte proteins.
    • Analysis of protein positional variation in a primary sample of 28 individuals.
    • Assessment of gene-dosage dependence and validation through twin and replicate sample analysis.

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    Main Results:

    • Nineteen out of 186 surveyed soluble lymphocyte proteins exhibited genetic polymorphism.
    • Observed polymorphisms showed quantitative gene-dosage dependence, with heterozygotes expressing approximately 50% of each allelic product.
    • The estimated frequency of polymorphic loci (P) was 0.102, and average heterozygosity was 0.024.

    Conclusions:

    • The study confirms the genetic basis of 19 newly identified soluble lymphocyte protein polymorphisms.
    • Two-dimensional electrophoresis reveals a higher rate of polymorphism compared to previous one-dimensional methods.
    • These polymorphisms serve as valuable genetic markers for human genome mapping and pedigree analysis.