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A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
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Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
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Gene expression and fractionation resistance.

Eric C H Chen, David Sankoff

    BMC Genomics
    |January 10, 2015
    PubMed
    Summary

    Gene functional category and expression level independently impact duplicate gene loss in plants. Unlike in Paramecium, gene expression is not the primary driver of this process in plants.

    Area of Science:

    • Genomics
    • Evolutionary Biology
    • Plant Science

    Background:

    • Whole genome doubling (WGD) in plants influences duplicate gene loss based on functional categories.
    • Studies in Paramecium suggest gene expression levels correlate with duplicate gene retention or loss.

    Purpose of the Study:

    • To investigate the combined influence of gene functional category and expression levels on duplicate gene loss in plants.
    • To compare the roles of functional category and expression in plant fractionation with findings in other organisms like Paramecium.

    Main Methods:

    • Analysis of two distinct plant datasets: rosids and asterids.
    • Simultaneous assessment of gene functional category and gene expression data.

    Main Results:

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    • Both gene functional category and expression level were found to have independent effects on duplicate gene loss.
    • Gene expression level's role in duplicate gene loss in plants is less dominant compared to its role in Paramecium.

    Conclusions:

    • Functional category and expression level are independent factors in plant duplicate gene loss.
    • The dominant role of gene expression in duplicate gene loss observed in Paramecium is not replicated in the studied plant lineages.