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Lambda light chain constant and variable gene complements in wild-derived inbred mouse strains.

T J Kindt, C Gris, J L Guenet

    European Journal of Immunology
    |June 1, 1985
    PubMed
    Summary
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    Wild-derived inbred mouse strains exhibit significant variation in lambda light chain gene composition and expression. These genetic differences in lambda light chains suggest independent evolution of variable and constant regions.

    Area of Science:

    • Immunogenetics
    • Molecular Evolution
    • Comparative Genomics

    Background:

    • Wild-derived inbred (WDI) mouse strains show considerable diversity in serum lambda light (L) chain levels and antibody response profiles.
    • Understanding the genetic basis of this diversity is crucial for immunological research.

    Purpose of the Study:

    • To investigate the correlation between the complement of lambda genes in WDI mice and their observed lambda expression patterns.
    • To explore potential links between lambda gene organization and the taxonomic classification of these mouse strains.

    Main Methods:

    • Southern blot analysis was employed to examine V lambda, C lambda 1, and C lambda 2 genes.
    • DNA hybridization patterns were compared across a diverse panel of WDI mouse strains.

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    Main Results:

    • All WDI strains possessed two to three V lambda gene sequences, with most showing sizes comparable to BALB/c V lambda 1 and V lambda 2.
    • Extensive variations in the number and size of hybridizing fragments for C lambda 1 and C lambda 2 genes were observed among WDI strains.
    • No clear correlation was found between V lambda and C lambda gene patterns and the phylogenetic groups of the studied mouse strains.

    Conclusions:

    • The variable (V) and constant (C) regions of mouse lambda light chains appear to have evolved independently.
    • A single kappa constant region gene is conserved across diverse mouse species, contrasting with lambda chain variability.