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Inverted repetitive sequences in the human genome

P J Dott, C R Chuang, G F Saunders

    Biochemistry
    |September 7, 1976
    PubMed
    Summary

    Inverted repetitive DNA sequences, found throughout the human genome, can fold into hairpin structures. Their precise biological function remains unknown.

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    Area of Science:

    • Genomics
    • Molecular Biology
    • DNA Structure

    Background:

    • Inverted repetitive sequences are a distinct class of DNA sequences.
    • These sequences can fold into hairpin-like structures in denatured DNA.
    • Their reassociation process is rapid and unimolecular.

    Purpose of the Study:

    • To characterize the prevalence and properties of inverted repetitive sequences in the human genome.
    • To investigate the distribution and characteristics of these sequences across different genomic contexts.

    Main Methods:

    • Analysis of DNA sequence data to identify and quantify inverted repetitive sequences.
    • Characterization of sequence length and distribution within the human genome.

    Main Results:

    • Inverted repetitive sequences constitute 6% of the human genome.
    • They exhibit heterogeneous lengths, averaging 190 nucleotides.
    • These sequences are found across all repetition frequency families and are not localized to specific chromosomal sites.
    • An estimated 2 X 10^6 inverted repeats exist per haploid human genome.

    Conclusions:

    • Inverted repetitive sequences are a significant and widespread component of the human genome.
    • Despite their abundance and structural properties, their biological function is currently unknown.

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