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. 1981 Dec;78(12):7684–7688. doi: 10.1073/pnas.78.12.7684

Mouse IgA heavy chain gene sequence: implications for evolution of immunoglobulin hinge axons.

P W Tucker, J L Slightom, F R Blattner
PMCID: PMC349334  PMID: 6801659

Abstract

The complete nucleotide sequence of the gene and mRNA coding for the constant (C) region of the secreted form of the BALB/c mouse IgA immunoglobulin alpha heavy (H) chain has been determined. As in other immunoglobulins, the three C region domains of the alpha protein, C alpha 1, C alpha 2, and C alpha 3 are coded in separate exons. However, the hinge region of C alpha is not coded on a separate exon as it is in other hinge-containing immunoglobulins. Instead, the alpha hinge is coded as a 5' extension of the C alpha 2 exon, and we suggest that it may have evolved by duplication leading to incorporation of an acceptor RNA splice site into the coding portion of the C alpha 2 exon. Extensions of this concept could provide an explanation for duplications in the human alpha 1 chain.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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