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MHC class I surface expression in HeLa cells expressing chimeric proteins. HeLa cells were transiently transfected with the individual cDNAs encoding chimeric proteins. After 48 h, the cell surface expression of MHC class I molecules was monitored by flow cytometry using MAb W6/32. Open areas represent the staining of mock-transfected cells, and filled areas represent the staining of cDNA-transfected cells.
