HCMV does not alter the rate of MHC class II internalization in Kasumi-3 cells. (A) Schematic showing the strategy for measuring the rate of MHC class II internalization. (B) Graph plotting the remaining surface HLA-DR levels in uninfected or infected samples at 0, 4, 8, 12, 24, and 36 h after the addition of primary antibody. Values are the means from three independent experiments.