Association of the Db heavy chain with beta 2-microglobulin and expression of Db and Kb at the surface of the cell are induced by specific peptides in the mutant RMA-S. Association of antigenic peptides with the binding site of class I molecules may be required for correct folding of the heavy chain, association with beta 2-microglobulin, and transport of the antigen-MHC complex to the cell surface.
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Townsend et al. (1989) studied this question.