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Validation of antibodies using ULBP-transfected COS7 cells. We confirmed the specificity of all antibodies against UL16-binding proteins (ULBP) using western blotting with cell lysates (A) and immunohistochemistry with a FFPE cell block (B) prepared from each ULBP transfectant, respectively. The anti-ULBP2 antibody cross-reacted with ULBP5 and ULBP6 in western blotting but only with ULBP6 in FFPE. Therefore, this antibody was used to mark ULBP2 and ULBP6. Scale, 50 μm.
