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Enhancement of HLA-B*5001 and HLA-B*5701 expression by tapasin. M553 cells (dotted lines) and M553(T240)tpsn cells (solid lines) were stained using the mAbs (a) w6/32, (b) TT4-A20, (c) SFR8.B6 which detect the indicated allelic products on these cells (open histograms). Staining with a control antibody is shown in the filled histograms.
