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Class I major histocompatibility complex (MHC) expression in D7RM-1 and RM-1 prostate cancer cell lines as measured by flow cytometry. RM-1 (A) and D7RM-1 (B) cells were stained with a fluorescein isothiocyanate–conjugated class I MHC-specific antibody. The dashed lines represent samples stained with isotype control antibodies. EL4 cell line (C) and the derivative β-gal expressing E22 cell line (D) were stained as controls showing abundant class I MHC expression.
