A mutant antigen-presenting cell defective in antigen presentation expresses class II MHC molecules with an altered conformation.
Dang LH, Lien LL, Benacerraf B, Rock KL. A mutant antigen-presenting cell defective in antigen presentation expresses class II MHC molecules with an altered conformation. J Immunol. 1993 May 15; 150(10):4206-17.