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    Area of Science:

    • Immunogenetics
    • Molecular Biology

    Background:

    • The major histocompatibility complex (MHC) plays a crucial role in immune responses.
    • The E alpha gene is an immune response gene within the MHC.

    Purpose of the Study:

    • To isolate and sequence cDNA and genomic clones of the murine E alpha gene.
    • To compare the murine E alpha gene with its human homolog, DR alpha.
    • To investigate the transcriptional regulation of E alpha gene expression.

    Main Methods:

    • Isolation and sequencing of cDNA and genomic clones.
    • Comparative sequence analysis between murine and human genes.
    • Analysis of gene expression patterns in different cell types.

    Main Results:

    • Identical intron-exon structure was observed between murine E alpha and human DR alpha genes.
    • Protein-coding sequences, particularly those for the immunoglobulin-like fold, are well conserved.
    • Noncoding sequences show less conservation, except for the promoter region.
    • Differential gene expression is regulated transcriptionally, without apparent need for genomic rearrangements.

    Conclusions:

    • The murine E alpha gene shares significant structural and sequence homology with the human DR alpha gene.
    • Transcriptional regulation is the primary mechanism controlling E alpha gene expression in various cell types.