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Journal of Experimental Medicine, Vol 182, 439-447, Copyright © 1995 by Rockefeller University Press
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JP Abastado, YC Lone, A Casrouge, G Boulot and P Kourilsky
Unite de Biologie Moleculaire du Gene, Institut National de la Sante et de la Recherche Medicale U277, Paris, France.
Major histocompatibility complex (MHC) class I molecules are cell- surface proteins that present peptides to CD8+ T cells. These peptides are mostly derived from endogenously synthesized protein. Recombinant, soluble MHC class I molecules were produced, purified, and loaded homogeneously with synthetic peptide. These MHC-peptide complexes were used to activate a T cell hybridoma. While monomers of MHC-peptide bound to the T cell, they showed no stimulatory activity. Dimers fully triggered the T cell hybridoma to secrete interleukin 2. This response was followed by a state in which the T cell was refractory to restimulation as a result of defective signal transduction through the T cell receptor.
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