Abstract
The intimate relationship between Ia antigens and immune responsiveness to a multitude of natural and synthetic antigens has been known for some time (1, 2). Recent studies using either anti-Ia antisera or monoclonal antibodies to block immune responses strongly suggest that la antigens are the products of Ir genes (3–5), but how a limited number of Ia antigens differentially regulate responses to a myriad of antigens is yet to be resolved. Presumably, their role in the presentation of antigen to immunocompetent cells is of fundamental importance and, as with other systems, Ia:antigen interactions will surely be dictated by the structures of the individual components of the la:antigen complex on the surface of the antigen-presenting cell. Primary structural alterations in the alpha and beta chains of the Class II heterodimer likely result in a failure to present antigen in a configuration appropriate for recognition and thus the failure of an animal to mount an immune response to that antigen. These alterations must also account for the multiple allelic variations recognized by both antibodies and T-cells.
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Estess, P., Begovich, A.B., Jones, P.P., McDevitt, H.O. (1986). Structure/Function Relationships Among Murine Class II Molecules: Sequence Analysis of I-A cDNA Clones. In: Feldmann, M., McMichael, A. (eds) Regulation of Immune Gene Expression. Experimental Biology and Medicine, vol 13. Humana Press. https://doi.org/10.1007/978-1-4612-5014-2_1
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DOI: https://doi.org/10.1007/978-1-4612-5014-2_1
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